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Chesapeake Utilities Corp. – ‘10-K’ for 12/31/23 – ‘EX-101.SCH’

On:  Wednesday, 2/21/24, at 4:55pm ET   ·   For:  12/31/23   ·   Accession #:  1628280-24-5944   ·   File #:  1-11590

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  As Of               Filer                 Filing    For·On·As Docs:Size             Issuer                      Filing Agent

 2/21/24  Chesapeake Utilities Corp.        10-K       12/31/23  136:18M                                    Workiva Inc Wde… FA01/FA

Annual Report   —   Form 10-K   —   SEA’34

Filing Table of Contents

Document/Exhibit                   Description                      Pages   Size 

 1: 10-K        Annual Report                                       HTML   3.60M 
 2: EX-10.33    Material Contract                                   HTML     41K 
 3: EX-10.34    Material Contract                                   HTML     43K 
 4: EX-21       Subsidiaries List                                   HTML     43K 
 5: EX-23.1     Consent of Expert or Counsel                        HTML     38K 
10: EX-97       Clawback Policy re: Recovery of Erroneously         HTML     46K 
                Awarded Compensation                                             
 6: EX-31.1     Certification -- §302 - SOA'02                      HTML     42K 
 7: EX-31.2     Certification -- §302 - SOA'02                      HTML     42K 
 8: EX-32.1     Certification -- §906 - SOA'02                      HTML     38K 
 9: EX-32.2     Certification -- §906 - SOA'02                      HTML     39K 
16: R1          Document and Entity Information                     HTML    103K 
17: R2          Audit Information                                   HTML     42K 
18: R3          Consolidated Statements of Income                   HTML    131K 
19: R4          Consolidated Statements of Comprehensive Income     HTML     97K 
20: R5          Consolidated Statements of Comprehensive Income     HTML     59K 
                (Parenthetical)                                                  
21: R6          Consolidated Statements of Cash Flows               HTML    134K 
22: R7          Consolidated Balance Sheets                         HTML    232K 
23: R8          Consolidated Balance Sheets (Parenthetical)         HTML     49K 
24: R9          Consolidated Statements of Stockholders' Equity     HTML    111K 
25: R10         Consolidated Statements of Stockholders' Equity     HTML     48K 
                Consolidated Statements of Stockholders' Equity                  
                (Parenthetical)                                                  
26: R11         Summary of Significant Accounting Policies          HTML    122K 
27: R12         Earnings Per Share                                  HTML     60K 
28: R13         Acquisitions                                        HTML     75K 
29: R14         Revenue Recognition Revenue Recognition (Notes)     HTML    237K 
30: R15         Segment Information                                 HTML    106K 
31: R16         Supplemental Cash Flow Disclosures                  HTML     57K 
32: R17         Derivative Instruments                              HTML     96K 
33: R18         Fair Value of Financial Instruments                 HTML     95K 
34: R19         Goodwill and Other Intangible Assets                HTML     67K 
35: R20         Income Taxes                                        HTML    111K 
36: R21         Long-Term Debt                                      HTML     95K 
37: R22         Short-Term Borrowing                                HTML     46K 
38: R23         Leases                                              HTML     80K 
39: R24         Stockholders' Equity                                HTML     67K 
40: R25         Employee Benefit Plans                              HTML    213K 
41: R26         Share-Based Compensation Plans                      HTML     77K 
42: R27         Rates and Other Regulatory Activities               HTML    118K 
43: R28         Environmental Commitments and Contingencies         HTML     47K 
44: R29         Other Commitments and Contingencies                 HTML     53K 
45: R30         Summary of Significant Accounting Policies          HTML    164K 
                (Policies)                                                       
46: R31         Summary of Significant Accounting Policies          HTML     79K 
                (Tables)                                                         
47: R32         Earnings Per Share (Tables)                         HTML     59K 
48: R33         Acquisitions (Tables)                               HTML     57K 
49: R34         Revenue Recognition Revenue Recognition (Tables)    HTML    227K 
50: R35         Segment Information Segment Information (Tables)    HTML     98K 
51: R36         Supplemental Cash Flow Disclosures (Tables)         HTML     58K 
52: R37         Derivative Instruments (Tables)                     HTML     94K 
53: R38         Fair Value of Financial Instruments (Tables)        HTML     87K 
54: R39         Goodwill and Other Intangible Assets (Tables)       HTML     69K 
55: R40         Income Taxes (Tables)                               HTML    109K 
56: R41         Long-Term Debt (Tables)                             HTML     86K 
57: R42         Leases Leases (Tables)                              HTML     85K 
58: R43         Stockholders' Equity (Tables)                       HTML     65K 
59: R44         Employee Benefit Plans (Tables)                     HTML    208K 
60: R45         Share-Based Compensation Plans (Tables)             HTML     76K 
61: R46         Rates and Other Regulatory Activities Summary of    HTML     90K 
                Effects of Tax Reform Impact on Regulated                        
                Businesses (Tables)                                              
62: R47         Environmental Commitments and Contingencies         HTML     41K 
                Environmental Remediation Status (Tables)                        
63: R48         Other Commitments and Contingencies Other           HTML     46K 
                Commitments and Contingencies (Tables)                           
64: R49         Summary of Significant Accounting Policies -        HTML     85K 
                Summary of Property, Plant and Equipment by                      
                Classification (Detail)                                          
65: R50         Summary of Significant Accounting Policies -        HTML     65K 
                Additional Information (Detail)                                  
66: R51         Summary of Significant Accounting Policies -        HTML     52K 
                Average Depreciation Rates (Detail)                              
67: R52         Summary of Significant Accounting Policies -        HTML     64K 
                Estimated Useful Lives of Assets (Detail)                        
68: R53         Summary of Significant Accounting Policies Effects  HTML     45K 
                of New Accounting Pronouncements (Details)                       
69: R54         Earnings Per Share - Calculations of Basic and      HTML     89K 
                Diluted Earnings Per Share (Detail)                              
70: R55         Acquisitions - Additional Information (Detail)      HTML    107K 
71: R56         Acquisitions - Summary of Purchase Price            HTML     71K 
                Allocation (Details)                                             
72: R57         Acquisitions - Schedule of Pro Forma Information    HTML     43K 
                (Details)                                                        
73: R58         Revenue Recognition Contract Balances (Details)     HTML     55K 
74: R59         Revenue Recognition Disaggregation of Revenue       HTML    140K 
                (Details)                                                        
75: R60         Revenue Recognition Remaining performance           HTML     88K 
                obligations (Details)                                            
76: R61         Segment Information - Schedule of Segment           HTML    144K 
                Reporting Information by Segment (Detail)                        
77: R62         Supplemental Cash Flow Disclosures - Cash Paid for  HTML     42K 
                Interest and Income Taxes (Detail)                               
78: R63         Supplemental Cash Flow Disclosures - Non-Cash       HTML     44K 
                Investing and Financing Activities (Detail)                      
79: R64         Derivative Instruments - Additional Information     HTML     86K 
                (Detail)                                                         
80: R65         Derivative Instruments Fair Value Hedges (Details)  HTML     42K 
81: R66         Derivative Instruments - Fair Values of Derivative  HTML     58K 
                Contracts Recorded in Consolidated Balance Sheets                
                (Detail)                                                         
82: R67         Derivative Instruments - Effects of Gains and       HTML     70K 
                Losses from Derivative Instruments (Detail)                      
83: R68         Derivative Instruments Volume of Derivative         HTML     43K 
                Activity (Details)                                               
84: R69         Fair Value of Financial Instruments - Additional    HTML     43K 
                Information (Detail)                                             
85: R70         Fair Value of Financial Instruments - Financial     HTML     99K 
                Assets and Liabilities Measured at Fair Value on                 
                Recurring Basis (Detail)                                         
86: R71         Goodwill and Other Intangible Assets - Additional   HTML     74K 
                Information (Detail)                                             
87: R72         Goodwill and Other Intangible Assets - Schedule of  HTML     68K 
                Carrying Value of Goodwill (Detail)                              
88: R73         Goodwill and Other Intangible Assets - Schedule of  HTML     54K 
                Carrying Value and Accumulated Amortization of                   
                Intangible Assets (Detail)                                       
89: R74         Income Taxes - Additional Information (Detail)      HTML     53K 
90: R75         Income Taxes - Schedule of Income Tax Expense       HTML     76K 
                (Detail)                                                         
91: R76         Income Taxes - Summary of Reconciliation of         HTML     61K 
                Statutory Federal Tax and Effective Income Tax                   
                Rates (Detail)                                                   
92: R77         Income Taxes - Schedule of Accumulated Deferred     HTML     79K 
                Income Tax Assets and Liabilities (Detail)                       
93: R78         Income Taxes - Schedule of Income Tax Expense       HTML     49K 
                (Phantoms) (Detail)                                              
94: R79         Income Taxes - Summary of Reconciliation of         HTML     40K 
                Statutory Federal Tax and Effective Income Tax                   
                Rates (Phantoms) (Detail)                                        
95: R80         Income Taxes Federal Tax Reform (Details)           HTML     45K 
96: R81         Long-Term Debt - Additional Information (Detail)    HTML    115K 
97: R82         Long-Term Debt - Outstanding Long-Term Debt         HTML    119K 
                (Detail)                                                         
98: R83         Long-Term Debt - Outstanding Long-Term Debt         HTML    112K 
                (Phantoms) (Detail)                                              
99: R84         Long-Term Debt Annual Maturities (Details)          HTML     53K 
100: R85         Long-Term Debt Shelf Arrangements (Details)         HTML     77K  
101: R86         Short-Term Borrowing - Additional Information       HTML     97K  
                (Detail)                                                         
102: R87         Short-Term Borrowing Short-Term Borrowing -         HTML     48K  
                Schedule of Short-Term Debt (Details)                            
103: R88         Leases Schedule of Future Minimum Rental Payment    HTML     59K  
                for Operating Leases (Details)                                   
104: R89         Leases Lease Cost Additional (Details)              HTML     40K  
105: R90         Leases Leases - Right of Use Asset and Lease        HTML     47K  
                Liability Balance Sheet Classification (Details)                 
106: R91         Leases Weighted Average Remaining Lease Term        HTML     42K  
                Additional Information (Details)                                 
107: R92         Leases Lease Cash Flows Additional Information      HTML     42K  
                (Details)                                                        
108: R93         Stockholders' Equity Additional Details (Details)   HTML     70K  
109: R94         Stockholders' Equity Accumulated Other              HTML     67K  
                comprehensive Income (Loss) - Changes in                         
                Accumulated Other Comprehensive Loss (Details)                   
110: R95         Stockholders' Equity Accumulated Other              HTML     74K  
                Comprehensive Income (loss) - Reclassifications of               
                Accumulated Other Comprehensive Loss (Details)                   
111: R96         Employee Benefit Plans - Additional Information     HTML    111K  
                (Detail)                                                         
112: R97         Employee Benefit Plans - Schedule of Funded Status  HTML     89K  
                of Benefit Obligation and Plan Assets (Detail)                   
113: R98         Employee Benefit Plans - Schedule of Amounts Not    HTML     70K  
                Yet Reflected in Net Periodic Benefit Cost and                   
                Included in Accumulated Other Comprehensive Income               
                Loss or Regulatory Assets (Detail)                               
114: R99         Employee Benefit Plans - Schedule of Assets by      HTML     53K  
                Investment Type (Detail)                                         
115: R100        Employee Benefit Plans - Schedule of Asset          HTML     53K  
                Allocation Strategy (Detail)                                     
116: R101        Employee Benefit Plans - Summary of Pension Plan    HTML     83K  
                Assets (Detail)                                                  
117: R102        Employee Benefit Plans - Summary of Changes in      HTML     90K  
                Fair Value of Level 3 Investments (Detail)                       
118: R103        Employee Benefit Plans - Component of Net Periodic  HTML     90K  
                Pension Cost (Benefit) (Detail)                                  
119: R104        Employee Benefit Plans - Schedule of Estimated      HTML     67K  
                Future Benefit Payments (Detail)                                 
120: R105        Share-Based Compensation - Additional Information   HTML     71K  
                (Detail)                                                         
121: R106        Share-Based Compensation Plans - Share-Based        HTML     61K  
                Compensation Amounts Included in Net Income                      
                (Detail)                                                         
122: R107        Share-Based Compensation Plans - Summary of Stock   HTML     49K  
                Activity Non-employee directors (Detail)                         
123: R108        Share-Based Compensation Plans - Summary of Stock   HTML     71K  
                Activity under SICP - Key employees (Detail)                     
124: R109        Share-Based Compensation Plans Shares Withheld and  HTML     41K  
                Tax Benefits Associated With Share-Based Payments                
                (Details)                                                        
125: R110        Rates and Other Regulatory Activities - Additional  HTML    125K  
                Information (Detail)                                             
126: R111        Rates and Other Regulatory Activities Regulatory    HTML     96K  
                Assets and Liabilities (Details)                                 
127: R112        Rates and Other Regulatory Activities Federal Tax   HTML     54K  
                Reform Impact for Regulated Businesses (Details)                 
128: R113        Environmental Commitments and Contingencies -       HTML     81K  
                Additional Information (Detail)                                  
129: R114        Other Commitments and Contingencies - Additional    HTML     82K  
                Information (Detail)                                             
130: R115        Other Commitments and Contingencies Purchase        HTML     47K  
                Obligations (Details)                                            
131: R116        Schedule II - Valuation and Qualifying Accounts     HTML     46K  
                (Detail)                                                         
133: XML         IDEA XML File -- Filing Summary                      XML    250K  
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<link:definition> 0000022 - Disclosure - Long-Term Debt </link:definition>
<link:usedOn> link:presentationLink </link:usedOn>
<link:usedOn> link:calculationLink </link:usedOn>
<link:usedOn> link:definitionLink </link:usedOn>
</link:roleType>
<link:roleType id="ShortTermBorrowing" roleURI="http://www.chpk.com/role/ShortTermBorrowing">
<link:definition> 0000023 - Disclosure - Short-Term Borrowing </link:definition>
<link:usedOn> link:presentationLink </link:usedOn>
<link:usedOn> link:calculationLink </link:usedOn>
<link:usedOn> link:definitionLink </link:usedOn>
</link:roleType>
<link:roleType id="Leases" roleURI="http://www.chpk.com/role/Leases">
<link:definition> 0000024 - Disclosure - Leases </link:definition>
<link:usedOn> link:presentationLink </link:usedOn>
<link:usedOn> link:calculationLink </link:usedOn>
<link:usedOn> link:definitionLink </link:usedOn>
</link:roleType>
<link:roleType id="StockholdersEquity" roleURI="http://www.chpk.com/role/StockholdersEquity">
<link:definition> 0000025 - Disclosure - Stockholders' Equity </link:definition>
<link:usedOn> link:presentationLink </link:usedOn>
<link:usedOn> link:calculationLink </link:usedOn>
<link:usedOn> link:definitionLink </link:usedOn>
</link:roleType>
<link:roleType id="EmployeeBenefitPlans" roleURI="http://www.chpk.com/role/EmployeeBenefitPlans">
<link:definition> 0000026 - Disclosure - Employee Benefit Plans </link:definition>
<link:usedOn> link:presentationLink </link:usedOn>
<link:usedOn> link:calculationLink </link:usedOn>
<link:usedOn> link:definitionLink </link:usedOn>
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<link:roleType id="ShareBasedCompensationPlans" roleURI="http://www.chpk.com/role/ShareBasedCompensationPlans">
<link:definition> 0000027 - Disclosure - Share-Based Compensation Plans </link:definition>
<link:usedOn> link:presentationLink </link:usedOn>
<link:usedOn> link:calculationLink </link:usedOn>
<link:usedOn> link:definitionLink </link:usedOn>
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<link:definition> 0000028 - Disclosure - Rates and Other Regulatory Activities </link:definition>
<link:usedOn> link:presentationLink </link:usedOn>
<link:usedOn> link:calculationLink </link:usedOn>
<link:usedOn> link:definitionLink </link:usedOn>
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<link:definition> 0000029 - Disclosure - Environmental Commitments and Contingencies </link:definition>
<link:usedOn> link:presentationLink </link:usedOn>
<link:usedOn> link:calculationLink </link:usedOn>
<link:usedOn> link:definitionLink </link:usedOn>
</link:roleType>
<link:roleType id="OtherCommitmentsandContingencies" roleURI="http://www.chpk.com/role/OtherCommitmentsandContingencies">
<link:definition> 0000030 - Disclosure - Other Commitments and Contingencies </link:definition>
<link:usedOn> link:presentationLink </link:usedOn>
<link:usedOn> link:calculationLink </link:usedOn>
<link:usedOn> link:definitionLink </link:usedOn>
</link:roleType>
<link:roleType id="ScheduleIIValuationandQualifyingAccounts" roleURI="http://www.chpk.com/role/ScheduleIIValuationandQualifyingAccounts">
<link:definition> 0000031 - Disclosure - Schedule II Valuation and Qualifying Accounts </link:definition>
<link:usedOn> link:presentationLink </link:usedOn>
<link:usedOn> link:calculationLink </link:usedOn>
<link:usedOn> link:definitionLink </link:usedOn>
</link:roleType>
<link:roleType id="SummaryofSignificantAccountingPoliciesPolicies" roleURI="http://www.chpk.com/role/SummaryofSignificantAccountingPoliciesPolicies">
<link:definition> 9954471 - Disclosure - Summary of Significant Accounting Policies (Policies) </link:definition>
<link:usedOn> link:presentationLink </link:usedOn>
<link:usedOn> link:calculationLink </link:usedOn>
<link:usedOn> link:definitionLink </link:usedOn>
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<link:roleType id="SummaryofSignificantAccountingPoliciesTables" roleURI="http://www.chpk.com/role/SummaryofSignificantAccountingPoliciesTables">
<link:definition> 9954472 - Disclosure - Summary of Significant Accounting Policies (Tables) </link:definition>
<link:usedOn> link:presentationLink </link:usedOn>
<link:usedOn> link:calculationLink </link:usedOn>
<link:usedOn> link:definitionLink </link:usedOn>
</link:roleType>
<link:roleType id="EarningsPerShareTables" roleURI="http://www.chpk.com/role/EarningsPerShareTables">
<link:definition> 9954473 - Disclosure - Earnings Per Share (Tables) </link:definition>
<link:usedOn> link:presentationLink </link:usedOn>
<link:usedOn> link:calculationLink </link:usedOn>
<link:usedOn> link:definitionLink </link:usedOn>
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<link:roleType id="AcquisitionsTables" roleURI="http://www.chpk.com/role/AcquisitionsTables">
<link:definition> 9954474 - Disclosure - Acquisitions (Tables) </link:definition>
<link:usedOn> link:presentationLink </link:usedOn>
<link:usedOn> link:calculationLink </link:usedOn>
<link:usedOn> link:definitionLink </link:usedOn>
</link:roleType>
<link:roleType id="RevenueRecognitionRevenueRecognitionTables" roleURI="http://www.chpk.com/role/RevenueRecognitionRevenueRecognitionTables">
<link:definition> 9954475 - Disclosure - Revenue Recognition Revenue Recognition (Tables) </link:definition>
<link:usedOn> link:presentationLink </link:usedOn>
<link:usedOn> link:calculationLink </link:usedOn>
<link:usedOn> link:definitionLink </link:usedOn>
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<link:roleType id="SegmentInformationSegmentInformationTables" roleURI="http://www.chpk.com/role/SegmentInformationSegmentInformationTables">
<link:definition> 9954476 - Disclosure - Segment Information Segment Information (Tables) </link:definition>
<link:usedOn> link:presentationLink </link:usedOn>
<link:usedOn> link:calculationLink </link:usedOn>
<link:usedOn> link:definitionLink </link:usedOn>
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<link:definition> 9954477 - Disclosure - Supplemental Cash Flow Disclosures (Tables) </link:definition>
<link:usedOn> link:presentationLink </link:usedOn>
<link:usedOn> link:calculationLink </link:usedOn>
<link:usedOn> link:definitionLink </link:usedOn>
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<link:roleType id="DerivativeInstrumentsTables" roleURI="http://www.chpk.com/role/DerivativeInstrumentsTables">
<link:definition> 9954478 - Disclosure - Derivative Instruments (Tables) </link:definition>
<link:usedOn> link:presentationLink </link:usedOn>
<link:usedOn> link:calculationLink </link:usedOn>
<link:usedOn> link:definitionLink </link:usedOn>
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<link:roleType id="FairValueofFinancialInstrumentsTables" roleURI="http://www.chpk.com/role/FairValueofFinancialInstrumentsTables">
<link:definition> 9954479 - Disclosure - Fair Value of Financial Instruments (Tables) </link:definition>
<link:usedOn> link:presentationLink </link:usedOn>
<link:usedOn> link:calculationLink </link:usedOn>
<link:usedOn> link:definitionLink </link:usedOn>
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<link:definition> 9954480 - Disclosure - Goodwill and Other Intangible Assets (Tables) </link:definition>
<link:usedOn> link:presentationLink </link:usedOn>
<link:usedOn> link:calculationLink </link:usedOn>
<link:usedOn> link:definitionLink </link:usedOn>
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<link:definition> 9954481 - Disclosure - Income Taxes (Tables) </link:definition>
<link:usedOn> link:presentationLink </link:usedOn>
<link:usedOn> link:calculationLink </link:usedOn>
<link:usedOn> link:definitionLink </link:usedOn>
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<link:definition> 9954482 - Disclosure - Long-Term Debt (Tables) </link:definition>
<link:usedOn> link:presentationLink </link:usedOn>
<link:usedOn> link:calculationLink </link:usedOn>
<link:usedOn> link:definitionLink </link:usedOn>
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<link:definition> 9954483 - Disclosure - Leases Leases (Tables) </link:definition>
<link:usedOn> link:presentationLink </link:usedOn>
<link:usedOn> link:calculationLink </link:usedOn>
<link:usedOn> link:definitionLink </link:usedOn>
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<link:definition> 9954484 - Disclosure - Stockholders' Equity (Tables) </link:definition>
<link:usedOn> link:presentationLink </link:usedOn>
<link:usedOn> link:calculationLink </link:usedOn>
<link:usedOn> link:definitionLink </link:usedOn>
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<link:definition> 9954485 - Disclosure - Employee Benefit Plans (Tables) </link:definition>
<link:usedOn> link:presentationLink </link:usedOn>
<link:usedOn> link:calculationLink </link:usedOn>
<link:usedOn> link:definitionLink </link:usedOn>
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<link:definition> 9954486 - Disclosure - Share-Based Compensation Plans (Tables) </link:definition>
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<link:usedOn> link:calculationLink </link:usedOn>
<link:usedOn> link:definitionLink </link:usedOn>
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<link:definition> 9954487 - Disclosure - Rates and Other Regulatory Activities Summary of Effects of Tax Reform Impact on Regulated Businesses (Tables) </link:definition>
<link:usedOn> link:presentationLink </link:usedOn>
<link:usedOn> link:calculationLink </link:usedOn>
<link:usedOn> link:definitionLink </link:usedOn>
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<link:definition> 9954488 - Disclosure - Environmental Commitments and Contingencies Environmental Remediation Status (Tables) </link:definition>
<link:usedOn> link:presentationLink </link:usedOn>
<link:usedOn> link:calculationLink </link:usedOn>
<link:usedOn> link:definitionLink </link:usedOn>
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<link:definition> 9954489 - Disclosure - Other Commitments and Contingencies Other Commitments and Contingencies (Tables) </link:definition>
<link:usedOn> link:presentationLink </link:usedOn>
<link:usedOn> link:calculationLink </link:usedOn>
<link:usedOn> link:definitionLink </link:usedOn>
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<link:definition> 9954490 - Disclosure - Summary of Significant Accounting Policies - Summary of Property, Plant and Equipment by Classification (Detail) </link:definition>
<link:usedOn> link:presentationLink </link:usedOn>
<link:usedOn> link:calculationLink </link:usedOn>
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<link:definition> 9954491 - Disclosure - Summary of Significant Accounting Policies - Additional Information (Detail) </link:definition>
<link:usedOn> link:presentationLink </link:usedOn>
<link:usedOn> link:calculationLink </link:usedOn>
<link:usedOn> link:definitionLink </link:usedOn>
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<link:definition> 9954492 - Disclosure - Summary of Significant Accounting Policies - Average Depreciation Rates (Detail) </link:definition>
<link:usedOn> link:presentationLink </link:usedOn>
<link:usedOn> link:calculationLink </link:usedOn>
<link:usedOn> link:definitionLink </link:usedOn>
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<link:definition> 9954493 - Disclosure - Summary of Significant Accounting Policies - Estimated Useful Lives of Assets (Detail) </link:definition>
<link:usedOn> link:presentationLink </link:usedOn>
<link:usedOn> link:calculationLink </link:usedOn>
<link:usedOn> link:definitionLink </link:usedOn>
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<link:definition> 9954494 - Disclosure - Summary of Significant Accounting Policies Effects of New Accounting Pronouncements (Details) </link:definition>
<link:usedOn> link:presentationLink </link:usedOn>
<link:usedOn> link:calculationLink </link:usedOn>
<link:usedOn> link:definitionLink </link:usedOn>
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<link:definition> 9954495 - Disclosure - Earnings Per Share - Calculations of Basic and Diluted Earnings Per Share (Detail) </link:definition>
<link:usedOn> link:presentationLink </link:usedOn>
<link:usedOn> link:calculationLink </link:usedOn>
<link:usedOn> link:definitionLink </link:usedOn>
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<link:roleType id="AcquisitionsAdditionalInformationDetail" roleURI="http://www.chpk.com/role/AcquisitionsAdditionalInformationDetail">
<link:definition> 9954496 - Disclosure - Acquisitions - Additional Information (Detail) </link:definition>
<link:usedOn> link:presentationLink </link:usedOn>
<link:usedOn> link:calculationLink </link:usedOn>
<link:usedOn> link:definitionLink </link:usedOn>
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<link:definition> 9954497 - Disclosure - Acquisitions - Summary of Purchase Price Allocation (Details) </link:definition>
<link:usedOn> link:presentationLink </link:usedOn>
<link:usedOn> link:calculationLink </link:usedOn>
<link:usedOn> link:definitionLink </link:usedOn>
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<link:definition> 9954498 - Disclosure - Acquisitions - Schedule of Pro Forma Information (Details) </link:definition>
<link:usedOn> link:presentationLink </link:usedOn>
<link:usedOn> link:calculationLink </link:usedOn>
<link:usedOn> link:definitionLink </link:usedOn>
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<link:roleType id="RevenueRecognitionContractBalancesDetails" roleURI="http://www.chpk.com/role/RevenueRecognitionContractBalancesDetails">
<link:definition> 9954499 - Disclosure - Revenue Recognition Contract Balances (Details) </link:definition>
<link:usedOn> link:presentationLink </link:usedOn>
<link:usedOn> link:calculationLink </link:usedOn>
<link:usedOn> link:definitionLink </link:usedOn>
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<link:roleType id="RevenueRecognitionDisaggregationofRevenueDetails" roleURI="http://www.chpk.com/role/RevenueRecognitionDisaggregationofRevenueDetails">
<link:definition> 9954500 - Disclosure - Revenue Recognition Disaggregation of Revenue (Details) </link:definition>
<link:usedOn> link:presentationLink </link:usedOn>
<link:usedOn> link:calculationLink </link:usedOn>
<link:usedOn> link:definitionLink </link:usedOn>
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<link:roleType id="RevenueRecognitionRemainingperformanceobligationsDetails" roleURI="http://www.chpk.com/role/RevenueRecognitionRemainingperformanceobligationsDetails">
<link:definition> 9954501 - Disclosure - Revenue Recognition Remaining performance obligations (Details) </link:definition>
<link:usedOn> link:presentationLink </link:usedOn>
<link:usedOn> link:calculationLink </link:usedOn>
<link:usedOn> link:definitionLink </link:usedOn>
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<link:roleType id="RevenueRecognitionRemainingperformanceobligationsDetails_1" roleURI="http://www.chpk.com/role/RevenueRecognitionRemainingperformanceobligationsDetails_1">
<link:definition> 9954501 - Disclosure - Revenue Recognition Remaining performance obligations (Details) </link:definition>
<link:usedOn> link:presentationLink </link:usedOn>
<link:usedOn> link:calculationLink </link:usedOn>
<link:usedOn> link:definitionLink </link:usedOn>
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<link:roleType id="SegmentInformationScheduleofSegmentReportingInformationbySegmentDetail" roleURI="http://www.chpk.com/role/SegmentInformationScheduleofSegmentReportingInformationbySegmentDetail">
<link:definition> 9954502 - Disclosure - Segment Information - Schedule of Segment Reporting Information by Segment (Detail) </link:definition>
<link:usedOn> link:presentationLink </link:usedOn>
<link:usedOn> link:calculationLink </link:usedOn>
<link:usedOn> link:definitionLink </link:usedOn>
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<link:definition> 9954503 - Disclosure - Supplemental Cash Flow Disclosures - Cash Paid for Interest and Income Taxes (Detail) </link:definition>
<link:usedOn> link:presentationLink </link:usedOn>
<link:usedOn> link:calculationLink </link:usedOn>
<link:usedOn> link:definitionLink </link:usedOn>
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<link:definition> 9954504 - Disclosure - Supplemental Cash Flow Disclosures - Non-Cash Investing and Financing Activities (Detail) </link:definition>
<link:usedOn> link:presentationLink </link:usedOn>
<link:usedOn> link:calculationLink </link:usedOn>
<link:usedOn> link:definitionLink </link:usedOn>
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<link:roleType id="DerivativeInstrumentsAdditionalInformationDetail" roleURI="http://www.chpk.com/role/DerivativeInstrumentsAdditionalInformationDetail">
<link:definition> 9954505 - Disclosure - Derivative Instruments - Additional Information (Detail) </link:definition>
<link:usedOn> link:presentationLink </link:usedOn>
<link:usedOn> link:calculationLink </link:usedOn>
<link:usedOn> link:definitionLink </link:usedOn>
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<link:roleType id="DerivativeInstrumentsFairValueHedgesDetails" roleURI="http://www.chpk.com/role/DerivativeInstrumentsFairValueHedgesDetails">
<link:definition> 9954506 - Disclosure - Derivative Instruments Fair Value Hedges (Details) </link:definition>
<link:usedOn> link:presentationLink </link:usedOn>
<link:usedOn> link:calculationLink </link:usedOn>
<link:usedOn> link:definitionLink </link:usedOn>
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<link:roleType id="DerivativeInstrumentsFairValuesofDerivativeContractsRecordedinConsolidatedBalanceSheetsDetail" roleURI="http://www.chpk.com/role/DerivativeInstrumentsFairValuesofDerivativeContractsRecordedinConsolidatedBalanceSheetsDetail">
<link:definition> 9954507 - Disclosure - Derivative Instruments - Fair Values of Derivative Contracts Recorded in Consolidated Balance Sheets (Detail) </link:definition>
<link:usedOn> link:presentationLink </link:usedOn>
<link:usedOn> link:calculationLink </link:usedOn>
<link:usedOn> link:definitionLink </link:usedOn>
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<link:roleType id="DerivativeInstrumentsEffectsofGainsandLossesfromDerivativeInstrumentsDetail" roleURI="http://www.chpk.com/role/DerivativeInstrumentsEffectsofGainsandLossesfromDerivativeInstrumentsDetail">
<link:definition> 9954508 - Disclosure - Derivative Instruments - Effects of Gains and Losses from Derivative Instruments (Detail) </link:definition>
<link:usedOn> link:presentationLink </link:usedOn>
<link:usedOn> link:calculationLink </link:usedOn>
<link:usedOn> link:definitionLink </link:usedOn>
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<link:roleType id="DerivativeInstrumentsAccountsReceivableandPayableonaGrossandNetBasisDetails" roleURI="http://www.chpk.com/role/DerivativeInstrumentsAccountsReceivableandPayableonaGrossandNetBasisDetails">
<link:definition> 9954509 - Disclosure - Derivative Instruments Accounts Receivable and Payable on a Gross and Net Basis (Details) </link:definition>
<link:usedOn> link:presentationLink </link:usedOn>
<link:usedOn> link:calculationLink </link:usedOn>
<link:usedOn> link:definitionLink </link:usedOn>
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<link:roleType id="DerivativeInstrumentsVolumeofDerivativeActivityDetails" roleURI="http://www.chpk.com/role/DerivativeInstrumentsVolumeofDerivativeActivityDetails">
<link:definition> 9954510 - Disclosure - Derivative Instruments Volume of Derivative Activity (Details) </link:definition>
<link:usedOn> link:presentationLink </link:usedOn>
<link:usedOn> link:calculationLink </link:usedOn>
<link:usedOn> link:definitionLink </link:usedOn>
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<link:roleType id="FairValueofFinancialInstrumentsAdditionalInformationDetail" roleURI="http://www.chpk.com/role/FairValueofFinancialInstrumentsAdditionalInformationDetail">
<link:definition> 9954511 - Disclosure - Fair Value of Financial Instruments - Additional Information (Detail) </link:definition>
<link:usedOn> link:presentationLink </link:usedOn>
<link:usedOn> link:calculationLink </link:usedOn>
<link:usedOn> link:definitionLink </link:usedOn>
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<link:roleType id="FairValueofFinancialInstrumentsFinancialAssetsandLiabilitiesMeasuredatFairValueonRecurringBasisDetail" roleURI="http://www.chpk.com/role/FairValueofFinancialInstrumentsFinancialAssetsandLiabilitiesMeasuredatFairValueonRecurringBasisDetail">
<link:definition> 9954512 - Disclosure - Fair Value of Financial Instruments - Financial Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) </link:definition>
<link:usedOn> link:presentationLink </link:usedOn>
<link:usedOn> link:calculationLink </link:usedOn>
<link:usedOn> link:definitionLink </link:usedOn>
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<link:roleType id="FairValueofFinancialInstrumentsFairValueofFinancialInstrumentsSummaryofChangesinFairValueofInstrumentsDetails" roleURI="http://www.chpk.com/role/FairValueofFinancialInstrumentsFairValueofFinancialInstrumentsSummaryofChangesinFairValueofInstrumentsDetails">
<link:definition> 9954513 - Disclosure - Fair Value of Financial Instruments Fair Value of Financial Instruments - Summary of Changes in Fair Value of Instruments (Details) </link:definition>
<link:usedOn> link:presentationLink </link:usedOn>
<link:usedOn> link:calculationLink </link:usedOn>
<link:usedOn> link:definitionLink </link:usedOn>
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<link:roleType id="GoodwillandOtherIntangibleAssetsAdditionalInformationDetail" roleURI="http://www.chpk.com/role/GoodwillandOtherIntangibleAssetsAdditionalInformationDetail">
<link:definition> 9954514 - Disclosure - Goodwill and Other Intangible Assets - Additional Information (Detail) </link:definition>
<link:usedOn> link:presentationLink </link:usedOn>
<link:usedOn> link:calculationLink </link:usedOn>
<link:usedOn> link:definitionLink </link:usedOn>
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<link:roleType id="GoodwillandOtherIntangibleAssetsScheduleofCarryingValueofGoodwillDetail" roleURI="http://www.chpk.com/role/GoodwillandOtherIntangibleAssetsScheduleofCarryingValueofGoodwillDetail">
<link:definition> 9954515 - Disclosure - Goodwill and Other Intangible Assets - Schedule of Carrying Value of Goodwill (Detail) </link:definition>
<link:usedOn> link:presentationLink </link:usedOn>
<link:usedOn> link:calculationLink </link:usedOn>
<link:usedOn> link:definitionLink </link:usedOn>
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<link:roleType id="GoodwillandOtherIntangibleAssetsScheduleofCarryingValueandAccumulatedAmortizationofIntangibleAssetsDetail" roleURI="http://www.chpk.com/role/GoodwillandOtherIntangibleAssetsScheduleofCarryingValueandAccumulatedAmortizationofIntangibleAssetsDetail">
<link:definition> 9954516 - Disclosure - Goodwill and Other Intangible Assets - Schedule of Carrying Value and Accumulated Amortization of Intangible Assets (Detail) </link:definition>
<link:usedOn> link:presentationLink </link:usedOn>
<link:usedOn> link:calculationLink </link:usedOn>
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<link:definition> 9954524 - Disclosure - Long-Term Debt - Additional Information (Detail) </link:definition>
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<link:definition> 9954525 - Disclosure - Long-Term Debt - Outstanding Long-Term Debt (Detail) </link:definition>
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<link:definition> 9954526 - Disclosure - Long-Term Debt - Outstanding Long-Term Debt (Phantoms) (Detail) </link:definition>
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<link:definition> 9954527 - Disclosure - Long-Term Debt Annual Maturities (Details) </link:definition>
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<link:definition> 9954528 - Disclosure - Long-Term Debt Shelf Arrangements (Details) </link:definition>
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<link:definition> 9954529 - Disclosure - Short-Term Borrowing - Additional Information (Detail) </link:definition>
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<link:definition> 9954530 - Disclosure - Short-Term Borrowing Short-Term Borrowing - Schedule of Short-Term Debt (Details) </link:definition>
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<link:definition> 9954531 - Disclosure - Leases Schedule of Future Minimum Rental Payment for Operating Leases (Details) </link:definition>
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<link:definition> 9954532 - Disclosure - Leases Lease Cost Additional (Details) </link:definition>
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<link:definition> 9954533 - Disclosure - Leases Leases - Right of Use Asset and Lease Liability Balance Sheet Classification (Details) </link:definition>
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<link:definition> 9954534 - Disclosure - Leases Weighted Average Remaining Lease Term Additional Information (Details) </link:definition>
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<link:definition> 9954535 - Disclosure - Leases Lease Cash Flows Additional Information (Details) </link:definition>
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<link:definition> 9954536 - Disclosure - Stockholders' Equity Additional Details (Details) </link:definition>
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<link:definition> 9954537 - Disclosure - Stockholders' Equity Accumulated Other comprehensive Income (Loss) - Changes in Accumulated Other Comprehensive Loss (Details) </link:definition>
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<link:definition> 9954544 - Disclosure - Employee Benefit Plans - Schedule of Asset Allocation Strategy (Detail) </link:definition>
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<link:definition> 9954545 - Disclosure - Employee Benefit Plans - Summary of Pension Plan Assets (Detail) </link:definition>
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<xs:element id="cpk_EasternShoreandPeninsulaPipelineMember" abstract="true" name="EasternShoreandPeninsulaPipelineMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_UnregulatedEnergyAndOtherCostOfSales" abstract="false" name="UnregulatedEnergyAndOtherCostOfSales" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
<xs:element id="cpk_StormCostRecoveryInterestMember" abstract="true" name="StormCostRecoveryInterestMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_UncollateralizedSeniorNoteDueAprilTwoThousandThirtyTwoMember" abstract="true" name="UncollateralizedSeniorNoteDueAprilTwoThousandThirtyTwoMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_DisclosureLongTermDebtAdditionalInformationAbstract" abstract="true" name="DisclosureLongTermDebtAdditionalInformationAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
<xs:element id="cpk_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsExpirationsWeightedAverageGrantDateFairValue" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsExpirationsWeightedAverageGrantDateFairValue" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:perShareItemType"/>
<xs:element id="cpk_BorrowingsOutstandingSustainableInvesting" abstract="false" name="BorrowingsOutstandingSustainableInvesting" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
<xs:element id="cpk_COVID19SettlementAmount" abstract="false" name="COVID19SettlementAmount" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
<xs:element id="cpk_EliminationsMember" abstract="true" name="EliminationsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_OtherDeferredIncomeTaxExpenseMember" abstract="true" name="OtherDeferredIncomeTaxExpenseMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_DeferredIncomeTaxLiabilityDeferredGasCosts" abstract="false" name="DeferredIncomeTaxLiabilityDeferredGasCosts" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
<xs:element id="cpk_GasUtilityAccessAndReplacementDirectiveRelatedCapitalExpenditures" abstract="false" name="GasUtilityAccessAndReplacementDirectiveRelatedCapitalExpenditures" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
<xs:element id="cpk_UncollateralizedSeniorNoteDueDecember2027Member" abstract="true" name="UncollateralizedSeniorNoteDueDecember2027Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
<xs:element id="cpk_MergerRelatedTransactionCostsMember" abstract="true" name="MergerRelatedTransactionCostsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_NumberOfMilesOfTransmissionPipe" abstract="false" name="NumberOfMilesOfTransmissionPipe" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
<xs:element id="cpk_FPUElectricDistributionMember" abstract="true" name="FPUElectricDistributionMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_AspireEnergyExpressMember" abstract="true" name="AspireEnergyExpressMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_DefinedContributionPlanMaximumEmployerContributionAsPercentageOfEligibleCompensation" abstract="false" name="DefinedContributionPlanMaximumEmployerContributionAsPercentageOfEligibleCompensation" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
<xs:element id="cpk_DeferredIncomeTaxDuetoRateChangeMember" abstract="true" name="DeferredIncomeTaxDuetoRateChangeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_PutOrCallOptionMember" abstract="true" name="PutOrCallOptionMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_ExpectedAmortizationOfPreMergerRegulatoryAsset" abstract="false" name="ExpectedAmortizationOfPreMergerRegulatoryAsset" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
<xs:element id="cpk_DelMarPathwayProjectDomain" abstract="true" name="DelMarPathwayProjectDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_LeasesWeightedAverageRemainingLeaseTermTableTextBlock" abstract="false" name="LeasesWeightedAverageRemainingLeaseTermTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
<xs:element id="cpk_ElktonGasMember" abstract="true" name="ElktonGasMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_OtherComprehensiveIncomeLossAdjustmentsAOCISwapAgreements" abstract="false" name="OtherComprehensiveIncomeLossAdjustmentsAOCISwapAgreements" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
<xs:element id="cpk_UnregulatedEnergyMember" abstract="true" name="UnregulatedEnergyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_PeriodofRemainingPerformanceObligationsDomain" abstract="true" name="PeriodofRemainingPerformanceObligationsDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_DeferredRateCaseExpensesCurrentMember" abstract="true" name="DeferredRateCaseExpensesCurrentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
<xs:element id="cpk_EquipmentSecurityNoteMember" abstract="true" name="EquipmentSecurityNoteMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_PropertyPlantAndEquipmentAxis" abstract="true" name="PropertyPlantAndEquipmentAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
<xs:element id="cpk_NumberOfUnsecuredBankCreditFacilities" abstract="false" name="NumberOfUnsecuredBankCreditFacilities" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
<xs:element id="cpk_AnnualDepreciationRatesTableTableTextBlock" abstract="false" name="AnnualDepreciationRatesTableTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
<xs:element id="cpk_StandbyLettersOfCredit" abstract="false" name="StandbyLettersOfCredit" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
<xs:element id="cpk_DisclosureShareBasedCompensationPlansShareBasedCompensationAmountsIncludedInNetIncomeAbstract" abstract="true" name="DisclosureShareBasedCompensationPlansShareBasedCompensationAmountsIncludedInNetIncomeAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
<xs:element id="cpk_LongtermDebtandCapitalLeaseObligationsNetofCurrentMaturities" abstract="false" name="LongtermDebtandCapitalLeaseObligationsNetofCurrentMaturities" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
<xs:element id="cpk_FloridaCityGasPurchasPriceAllocationTableTextBlock" abstract="false" name="FloridaCityGasPurchasPriceAllocationTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
<xs:element id="cpk_TonsOfPoultryLitter" abstract="false" name="TonsOfPoultryLitter" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
<xs:element id="cpk_DisclosureEmployeeBenefitPlansScheduleOfEstimatedFutureBenefitPaymentsAbstract" abstract="true" name="DisclosureEmployeeBenefitPlansScheduleOfEstimatedFutureBenefitPaymentsAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
<xs:element id="cpk_PropaneOperationsMember" abstract="true" name="PropaneOperationsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_DisclosureShareBasedCompensationPlansSummaryOfStockActivityNonemployeedirectorsAbstract" abstract="true" name="DisclosureShareBasedCompensationPlansSummaryOfStockActivityNonemployeedirectorsAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
<xs:element id="cpk_CommittedLineofCreditFacilityOneMember" abstract="true" name="CommittedLineofCreditFacilityOneMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_DelmarvaMember" abstract="true" name="DelmarvaMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_SummaryofEffectsofFederalTaxReformonRegulatedBusinessesAbstract" abstract="true" name="SummaryofEffectsofFederalTaxReformonRegulatedBusinessesAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
<xs:element id="cpk_FloridaPublicUtilitiesCompanyMember" abstract="true" name="FloridaPublicUtilitiesCompanyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_IntersegmentRevenuesAbstract" abstract="true" name="IntersegmentRevenuesAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
<xs:element id="cpk_UncollateralizedSeniorNoteDueMarch152042Member" abstract="true" name="UncollateralizedSeniorNoteDueMarch152042Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_BusinessAcquisitionPremiumPaid" abstract="false" name="BusinessAcquisitionPremiumPaid" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
<xs:element id="cpk_DeferredIncomeTaxLiabilityStormReserve" abstract="false" name="DeferredIncomeTaxLiabilityStormReserve" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
<xs:element id="cpk_OtherRegulatoryAssetMember" abstract="true" name="OtherRegulatoryAssetMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_DisclosureEmployeeBenefitPlansScheduleOfFundedStatusOfBenefitObligationAndPlanAssetsAbstract" abstract="true" name="DisclosureEmployeeBenefitPlansScheduleOfFundedStatusOfBenefitObligationAndPlanAssetsAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
<xs:element id="cpk_BeachsideExpansionMember" abstract="true" name="BeachsideExpansionMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetsRegulatoryAssetsNoncurrent" abstract="false" name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetsRegulatoryAssetsNoncurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
<xs:element id="cpk_RatesandOtherRegulatoryActivitiesLineItems" abstract="true" name="RatesandOtherRegulatoryActivitiesLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
<xs:element id="cpk_TermNoteDueJanuaryTwoThousandTwentyMember" abstract="true" name="TermNoteDueJanuaryTwoThousandTwentyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_DisclosureFairValueOfFinancialInstrumentsFinancialAssetsAndLiabilitiesMeasuredAtFairValueOnRecurringBasisAbstract" abstract="true" name="DisclosureFairValueOfFinancialInstrumentsFinancialAssetsAndLiabilitiesMeasuredAtFairValueOnRecurringBasisAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
<xs:element id="cpk_UncollateralizedSeniorNoteDueMayTwoThousandThirtyEightMember" abstract="true" name="UncollateralizedSeniorNoteDueMayTwoThousandThirtyEightMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_FloridaCityGasMember" abstract="true" name="FloridaCityGasMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
<xs:element id="cpk_ConstructionWorkInProgress" abstract="false" name="ConstructionWorkInProgress" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
<xs:element id="cpk_DisclosureGoodwillAndOtherIntangibleAssetsScheduleOfCarryingValueAndAccumulatedAmortizationOfIntangibleAssetsAbstract" abstract="true" name="DisclosureGoodwillAndOtherIntangibleAssetsScheduleOfCarryingValueAndAccumulatedAmortizationOfIntangibleAssetsAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
<xs:element id="cpk_UnderrecoveredGRIPRevenueMember" abstract="true" name="UnderrecoveredGRIPRevenueMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_VariousMember" abstract="true" name="VariousMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_DiscontinuedOperationGainLossonDisposalofDiscontinuedOperationNetofLossfromDiscontinuedOperationsNetofTax" abstract="false" name="DiscontinuedOperationGainLossonDisposalofDiscontinuedOperationNetofLossfromDiscontinuedOperationsNetofTax" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
<xs:element id="cpk_RateCaseMember" abstract="true" name="RateCaseMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_MetLifeMember" abstract="true" name="MetLifeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_LeasesCashFlowsAbstract" abstract="true" name="LeasesCashFlowsAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
<xs:element id="cpk_OperatingRevenuesUnaffiliatedCustomersAbstract" abstract="true" name="OperatingRevenuesUnaffiliatedCustomersAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
<xs:element id="cpk_AccumulatedOtherComprehensiveIncomeLossTaxEffect" abstract="false" name="AccumulatedOtherComprehensiveIncomeLossTaxEffect" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
<xs:element id="cpk_GuaranteeTypeDomain" abstract="true" name="GuaranteeTypeDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_StockIssuedValueDuringThePeriodSharesRetirementSavingsPlanAndDividendReinvestmentPlan" abstract="false" name="StockIssuedValueDuringThePeriodSharesRetirementSavingsPlanAndDividendReinvestmentPlan" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
<xs:element id="cpk_UnrestrictedPayment" abstract="false" name="UnrestrictedPayment" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
<xs:element id="cpk_AmountsSpenttoRestoreService" abstract="false" name="AmountsSpenttoRestoreService" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
<xs:element id="cpk_UnregulatedEnergyPropertyPlantAndEquipment" abstract="false" name="UnregulatedEnergyPropertyPlantAndEquipment" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
<xs:element id="cpk_MobileCNGUtilityandPipelineSolutionsMember" abstract="true" name="MobileCNGUtilityandPipelineSolutionsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_TotalOperatingandFinanceLeaseLiabilities" abstract="false" name="TotalOperatingandFinanceLeaseLiabilities" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
<xs:element id="cpk_PermanentRateRelief" abstract="false" name="PermanentRateRelief" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
<xs:element id="cpk_NaturalgasprocessingequipmentMember" abstract="true" name="NaturalgasprocessingequipmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_MarylandNaturalGasDistributionBusinessesMember" abstract="true" name="MarylandNaturalGasDistributionBusinessesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
<xs:element id="cpk_RegulatoryAssetsRelatedToEnvironmentalCosts" abstract="false" name="RegulatoryAssetsRelatedToEnvironmentalCosts" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
<xs:element id="cpk_IntangibleAssetsAmortizationPeriod" abstract="false" name="IntangibleAssetsAmortizationPeriod" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
<xs:element id="cpk_WestPalmBeachFloridaMember" abstract="true" name="WestPalmBeachFloridaMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_DefinedBenefitPlanFairValueofPlanAssetsExcludingNetAssetValueInvestments" abstract="false" name="DefinedBenefitPlanFairValueofPlanAssetsExcludingNetAssetValueInvestments" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
<xs:element id="cpk_FortMeadeandIndiantownDivisionsMember" abstract="true" name="FortMeadeandIndiantownDivisionsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_NYLUnsecuredDebtMember" abstract="true" name="NYLUnsecuredDebtMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_SandpiperMember" abstract="true" name="SandpiperMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_NumberofPlans" abstract="false" name="NumberofPlans" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
<xs:element id="cpk_DelMarPathwayProjectMember" abstract="true" name="DelMarPathwayProjectMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_NonCashPerformanceIncentivePlanRetirement" abstract="false" name="NonCashPerformanceIncentivePlanRetirement" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
<xs:element id="cpk_RequiredFixedChargeCoverageRatio" abstract="false" name="RequiredFixedChargeCoverageRatio" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:decimalItemType"/>
<xs:element id="cpk_OverrecoveredGasAndFuelCostsMember" abstract="true" name="OverrecoveredGasAndFuelCostsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_MidAtlanticandFloridaMember" abstract="true" name="MidAtlanticandFloridaMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_FloridaPublicUtilitiesCompanyMedicalPlanMember" abstract="true" name="FloridaPublicUtilitiesCompanyMedicalPlanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_BouldenMember" abstract="true" name="BouldenMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_CommonStockSharesIssuedAtTheMarket" abstract="false" name="CommonStockSharesIssuedAtTheMarket" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
<xs:element id="cpk_DivisionorBusinessUnitAxis" abstract="true" name="DivisionorBusinessUnitAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
<xs:element id="cpk_InterestRateSwapRateHighRangeMember" abstract="true" name="InterestRateSwapRateHighRangeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_RegulatoryLiabilitiesRelatedtotheFederalTaxReformImpactLineItems" abstract="true" name="RegulatoryLiabilitiesRelatedtotheFederalTaxReformImpactLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
<xs:element id="cpk_LeaseCashFlowTableTextBlock" abstract="false" name="LeaseCashFlowTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
<xs:element id="cpk_FirstMortgageBondDueOnTwoThousandTwentyTwoMember" abstract="true" name="FirstMortgageBondDueOnTwoThousandTwentyTwoMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_Firmnaturalgastransportationdeliverability" abstract="false" name="Firmnaturalgastransportationdeliverability" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:decimalItemType"/>
<xs:element id="cpk_DisclosureSupplementalCashFlowDisclosuresCashPaidForInterestAndIncomeTaxesAbstract" abstract="true" name="DisclosureSupplementalCashFlowDisclosuresCashPaidForInterestAndIncomeTaxesAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
<xs:element id="cpk_RatesandOtherRegulatoryActivitiesTable" abstract="true" name="RatesandOtherRegulatoryActivitiesTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
<xs:element id="cpk_RabbiTrustAssociatedWithDeferredCompensationMember" abstract="true" name="RabbiTrustAssociatedWithDeferredCompensationMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_OtherMember" abstract="true" name="OtherMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_CommittedLineofCreditFacilityThreeMember" abstract="true" name="CommittedLineofCreditFacilityThreeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_DebtServiceCoverageRatio" abstract="false" name="DebtServiceCoverageRatio" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
<xs:element id="cpk_NetOperatingLossesAndTaxCarryforwardsRecovered" abstract="false" name="NetOperatingLossesAndTaxCarryforwardsRecovered" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
<xs:element id="cpk_DisclosureEmployeeBenefitPlansScheduleOfAssetAllocationStrategyAbstract" abstract="true" name="DisclosureEmployeeBenefitPlansScheduleOfAssetAllocationStrategyAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
<xs:element id="cpk_OtherUnregulatedEnergyMember" abstract="true" name="OtherUnregulatedEnergyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_DelmarvaandFloridaMember" abstract="true" name="DelmarvaandFloridaMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_ProceedsFromIssuanceOfCommonStockAtTheMarket" abstract="false" name="ProceedsFromIssuanceOfCommonStockAtTheMarket" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
<xs:element id="cpk_UncollateralizedSeniorNoteDueOnMay2TwoThousandTwentyEightMember" abstract="true" name="UncollateralizedSeniorNoteDueOnMay2TwoThousandTwentyEightMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_NewAccountingPronouncementOrChangeInAccountingPrincipleEffectOfAdoptionQuantificationPrincipleEffectOfAdoptionQuantification" abstract="false" name="NewAccountingPronouncementOrChangeInAccountingPrincipleEffectOfAdoptionQuantificationPrincipleEffectOfAdoptionQuantification" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
<xs:element id="cpk_EightFlagsMember" abstract="true" name="EightFlagsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_AggregatedUnfundedCommitmentsMember" abstract="true" name="AggregatedUnfundedCommitmentsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_SwapSalesMember" abstract="true" name="SwapSalesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_UncollateralizedSeniorNoteTwoDueonDecemberTwoThousandTwentyEightMember" abstract="true" name="UncollateralizedSeniorNoteTwoDueonDecemberTwoThousandTwentyEightMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_EnergyTransmissionMember" abstract="true" name="EnergyTransmissionMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_DisclosureFairValueOfFinancialInstrumentsAdditionalInformationAbstract" abstract="true" name="DisclosureFairValueOfFinancialInstrumentsAdditionalInformationAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
<xs:element id="cpk_DiameterAxis" abstract="true" name="DiameterAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
<xs:element id="cpk_DeferredIncomeTaxOnAcquisitionAdjustment" abstract="false" name="DeferredIncomeTaxOnAcquisitionAdjustment" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
<xs:element id="cpk_UncollateralizedSeniorNoteDueNovemberTwoThousandThirtyFourMember" abstract="true" name="UncollateralizedSeniorNoteDueNovemberTwoThousandThirtyFourMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_COVID19RegulatoryAsset" abstract="false" name="COVID19RegulatoryAsset" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
<xs:element id="cpk_OverRecoveredGRIPRevenueMember" abstract="true" name="OverRecoveredGRIPRevenueMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
<xs:element id="cpk_IncomeTaxReformAbstract" abstract="true" name="IncomeTaxReformAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
<xs:element id="cpk_NewberryExpansionMember" abstract="true" name="NewberryExpansionMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
<xs:element id="cpk_DeferredTaxAssetsOperatingLossCarryforwardsTotal" abstract="false" name="DeferredTaxAssetsOperatingLossCarryforwardsTotal" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
<xs:element id="cpk_BusinessCombinationWorkingCapital" abstract="false" name="BusinessCombinationWorkingCapital" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
<xs:element id="cpk_DefinedBenefitPlanAccruedPensionCostsAccruedExpensesEmploymentBenefits" abstract="false" name="DefinedBenefitPlanAccruedPensionCostsAccruedExpensesEmploymentBenefits" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
<xs:element id="cpk_StormReserveMember" abstract="true" name="StormReserveMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_UncollateralizedSeniorNoteOneDueOnTwoThousandSeventeenMember" abstract="true" name="UncollateralizedSeniorNoteOneDueOnTwoThousandSeventeenMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_NaturalGasSwapsMember" abstract="true" name="NaturalGasSwapsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_UncollateralizedSeniorNoteDueOnTwoThousandTwentySixMember" abstract="true" name="UncollateralizedSeniorNoteDueOnTwoThousandTwentySixMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_HighYieldAssetBackedSecuritiesMember" abstract="true" name="HighYieldAssetBackedSecuritiesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_FixedSwapRate" abstract="false" name="FixedSwapRate" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
<xs:element id="cpk_NewYorkLifeMember" abstract="true" name="NewYorkLifeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_UnrealizedGainLossOnCashFlowHedgingInstrumentsTax" abstract="false" name="UnrealizedGainLossOnCashFlowHedgingInstrumentsTax" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
<xs:element id="cpk_MarylandNaturalGasMember" abstract="true" name="MarylandNaturalGasMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_DeferredCompensationEmployerMatchingContributionRate" abstract="false" name="DeferredCompensationEmployerMatchingContributionRate" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
<xs:element id="cpk_NumberofMonthstoEstablishROUAssetandLiability" abstract="false" name="NumberofMonthstoEstablishROUAssetandLiability" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
<xs:element id="cpk_FloridaPublicUtilitiesCompanyPensionPlanMember" abstract="true" name="FloridaPublicUtilitiesCompanyPensionPlanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_AlternativeInvestmentMember" abstract="true" name="AlternativeInvestmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_MarkToMarketEnergyAssetsMember" abstract="true" name="MarkToMarketEnergyAssetsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_AwardstononemployeedirectorMember" abstract="true" name="AwardstononemployeedirectorMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_DisclosureIncomeTaxesScheduleOfAccumulatedDeferredIncomeTaxAssetsAndLiabilitiesAbstract" abstract="true" name="DisclosureIncomeTaxesScheduleOfAccumulatedDeferredIncomeTaxAssetsAndLiabilitiesAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
<xs:element id="cpk_RegulatoryLiabilitiesRelatedtotheFederalTaxReformImpactTable" abstract="true" name="RegulatoryLiabilitiesRelatedtotheFederalTaxReformImpactTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
<xs:element id="cpk_DeferredConversionAndDevelopmentCostsMember" abstract="true" name="DeferredConversionAndDevelopmentCostsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_UncollateralizedSeniorNoteDueDecember2026Member" abstract="true" name="UncollateralizedSeniorNoteDueDecember2026Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
<xs:element id="cpk_EnvironmentalCommitmentsAndContingenciesLineItems" abstract="true" name="EnvironmentalCommitmentsAndContingenciesLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
<xs:element id="cpk_DisclosureEmployeeBenefitPlansAdditionalInformationAbstract" abstract="true" name="DisclosureEmployeeBenefitPlansAdditionalInformationAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
<xs:element id="cpk_NetOperatingLossesAndTaxCarrybackTotal" abstract="false" name="NetOperatingLossesAndTaxCarrybackTotal" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
<xs:element id="cpk_TotalBaseRateIncrease" abstract="false" name="TotalBaseRateIncrease" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
<xs:element id="cpk_MarlinGasServicesMember" abstract="true" name="MarlinGasServicesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_NaturalgaspipelinesMember" abstract="true" name="NaturalgaspipelinesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_EnergyServicesMember" abstract="true" name="EnergyServicesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_DeferredChargesAndOtherAssets" abstract="false" name="DeferredChargesAndOtherAssets" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
<xs:element id="cpk_InterestRateCreditAdjustment" abstract="false" name="InterestRateCreditAdjustment" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
<xs:element id="cpk_ComponentsOfIncomeTaxExpenseBenefitLineItems" abstract="true" name="ComponentsOfIncomeTaxExpenseBenefitLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
<xs:element id="cpk_CommittedLineofCreditFacilityTwoMember" abstract="true" name="CommittedLineofCreditFacilityTwoMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_RegulatedEnergyMember" abstract="true" name="RegulatedEnergyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_IncrementalRevenueStormCostRecovery" abstract="false" name="IncrementalRevenueStormCostRecovery" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
<xs:element id="cpk_UnitedStatesEquitySmallCapMember" abstract="true" name="UnitedStatesEquitySmallCapMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_CentralFloridaGasDivisionMember" abstract="true" name="CentralFloridaGasDivisionMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_RegulatoryLiabilityAmortizationPeriodRevised" abstract="false" name="RegulatoryLiabilityAmortizationPeriodRevised" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
<xs:element id="cpk_WesternNaturalGasMember" abstract="true" name="WesternNaturalGasMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_NumberofMainlinePipelineMiles" abstract="false" name="NumberofMainlinePipelineMiles" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types1:lengthItemType"/>
<xs:element id="cpk_MinimumInterestCoverageRatioUnderAgreementTwo" abstract="false" name="MinimumInterestCoverageRatioUnderAgreementTwo" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
<xs:element id="cpk_OtherPropertyPlantAndEquipmentMember" abstract="true" name="OtherPropertyPlantAndEquipmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_RetirementMedicalBenefitsPlansMember" abstract="true" name="RetirementMedicalBenefitsPlansMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_OwnershipInterest" abstract="false" name="OwnershipInterest" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
<xs:element id="cpk_PaymentsForEnvironmentalExpenditures" abstract="false" name="PaymentsForEnvironmentalExpenditures" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
<xs:element id="cpk_SharesHeldInTrustForDeferredCompensationPlan" abstract="false" name="SharesHeldInTrustForDeferredCompensationPlan" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
<xs:element id="cpk_DisclosureRatesAndOtherRegulatoryActivitiesAdditionalInformationAbstract" abstract="true" name="DisclosureRatesAndOtherRegulatoryActivitiesAdditionalInformationAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
<xs:element id="cpk_UsMidCapEquitySecuritiesMember" abstract="true" name="UsMidCapEquitySecuritiesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_SpecificPurposeMember" abstract="true" name="SpecificPurposeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_OtherRegulatoryLiabilityMember" abstract="true" name="OtherRegulatoryLiabilityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_PrudentialMember" abstract="true" name="PrudentialMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_TermNoteDueFebruaryTwoThousandTwentyMember" abstract="true" name="TermNoteDueFebruaryTwoThousandTwentyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_InterimRates" abstract="false" name="InterimRates" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
<xs:element id="cpk_NumberofSubPlans" abstract="false" name="NumberofSubPlans" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
<xs:element id="cpk_AggregateShelfAgreementsMember" abstract="true" name="AggregateShelfAgreementsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_CHPPlantMember" abstract="true" name="CHPPlantMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_UncollateralizedSeniorNoteDueJanuaryTwoThousandThirtySevenMember" abstract="true" name="UncollateralizedSeniorNoteDueJanuaryTwoThousandThirtySevenMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_DeferredChargesAndOtherAssetsAbstract" abstract="true" name="DeferredChargesAndOtherAssetsAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
<xs:element id="cpk_J.T.LeeAndSonsMember" abstract="true" name="J.T.LeeAndSonsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
<xs:element id="cpk_TCJAImpactDomain" abstract="true" name="TCJAImpactDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_TotalforSegmentsMember" abstract="true" name="TotalforSegmentsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_DelayofRevenueRecognitionDueToImplementationofNewStandard" abstract="false" name="DelayofRevenueRecognitionDueToImplementationofNewStandard" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
<xs:element id="cpk_EnvironmentalRegulatoryAssetsAndExpendituresMember" abstract="true" name="EnvironmentalRegulatoryAssetsAndExpendituresMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_DeferredIncomeTaxLiabilityNaturalGasConversionCosts" abstract="false" name="DeferredIncomeTaxLiabilityNaturalGasConversionCosts" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
<xs:element id="cpk_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedRegulatoryAssetsCurrent" abstract="false" name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedRegulatoryAssetsCurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
<xs:element id="cpk_AcceleratedVestedSharesMember" abstract="true" name="AcceleratedVestedSharesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_DavenportEnergyMember" abstract="true" name="DavenportEnergyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_MarylandNaturalGasDistributionBusinessesDomain" abstract="true" name="MarylandNaturalGasDistributionBusinessesDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
<xs:element id="cpk_DeferralsRatesAfterDeferralPeriodEndsMinimum" abstract="false" name="DeferralsRatesAfterDeferralPeriodEndsMinimum" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
<xs:element id="cpk_DeferredPostRetirementBenefitsMember" abstract="true" name="DeferredPostRetirementBenefitsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_GuaranteedIncomeFundMember" abstract="true" name="GuaranteedIncomeFundMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_SelfInsuredLiabilitiesMember" abstract="true" name="SelfInsuredLiabilitiesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_PeninsulaPipelineMember" abstract="true" name="PeninsulaPipelineMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_PropaneSwapAgreementMember" abstract="true" name="PropaneSwapAgreementMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_DisclosureEmployeeBenefitPlansScheduleOfAmountsNotYetReflectedInNetPeriodicBenefitCostAndIncludedInAccumulatedOtherComprehensiveIncomeLossOrRegulatoryAssetsAbstract" abstract="true" name="DisclosureEmployeeBenefitPlansScheduleOfAmountsNotYetReflectedInNetPeriodicBenefitCostAndIncludedInAccumulatedOtherComprehensiveIncomeLossOrRegulatoryAssetsAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
<xs:element id="cpk_EmployeeDeferralRate" abstract="false" name="EmployeeDeferralRate" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
<xs:element id="cpk_DisclosureEmployeeBenefitPlansComponentOfNetPeriodicPensionCostBenefitAbstract" abstract="true" name="DisclosureEmployeeBenefitPlansComponentOfNetPeriodicPensionCostBenefitAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
<xs:element id="cpk_UncollateralizedSeniorNoteDueDecemberTwoThousandThirtyFourMember" abstract="true" name="UncollateralizedSeniorNoteDueDecemberTwoThousandThirtyFourMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_DivisionOrBusinessUnit1Domain" abstract="true" name="DivisionOrBusinessUnit1Domain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_DisclosureEarningsPerShareCalculationsOfBasicAndDilutedEarningsPerShareAbstract" abstract="true" name="DisclosureEarningsPerShareCalculationsOfBasicAndDilutedEarningsPerShareAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
<xs:element id="cpk_PlanetFoundMember" abstract="true" name="PlanetFoundMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeLossafterTaxRollForward" abstract="true" name="DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeLossafterTaxRollForward" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
<xs:element id="cpk_AmortizationOfPreMergerRegulatoryAsset" abstract="false" name="AmortizationOfPreMergerRegulatoryAsset" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
<xs:element id="cpk_NumberOfMilesOfDistributionMains" abstract="false" name="NumberOfMilesOfDistributionMains" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
<xs:element id="cpk_UncollateralizedSeniorNoteDueMarch142038Abstract" abstract="true" name="UncollateralizedSeniorNoteDueMarch142038Abstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
<xs:element id="cpk_ScheduleOfSegmentReportingInformationBySegmentTableTextBlock" abstract="false" name="ScheduleOfSegmentReportingInformationBySegmentTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
<xs:element id="cpk_RestrictedPayment" abstract="false" name="RestrictedPayment" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
<xs:element id="cpk_LiquefiedPetroleumGasEquipmentMember" abstract="true" name="LiquefiedPetroleumGasEquipmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_PeriodForAmortizationOfShareBasedExpenses" abstract="false" name="PeriodForAmortizationOfShareBasedExpenses" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
<xs:element id="cpk_AccumulatedGainLossfromCommodityContractsCashFlowsHedgesMember" abstract="true" name="AccumulatedGainLossfromCommodityContractsCashFlowsHedgesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_DefinedBenefitPlanReconciliationOfFundedStatusAbstract" abstract="true" name="DefinedBenefitPlanReconciliationOfFundedStatusAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
<xs:element id="cpk_COVID19DeferredCostsMember" abstract="true" name="COVID19DeferredCostsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_ElectricLimitedProceedingsMember" abstract="true" name="ElectricLimitedProceedingsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_OtherComprehensiveIncomeLossUnrealizedGainLossOnInterestRateSwapsDuringPeriodTax" abstract="false" name="OtherComprehensiveIncomeLossUnrealizedGainLossOnInterestRateSwapsDuringPeriodTax" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
<xs:element id="cpk_EstimatedUsefulLifeOfAssetsTableTableTextBlock" abstract="false" name="EstimatedUsefulLifeOfAssetsTableTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
<xs:element id="cpk_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsExpiredInPeriod" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsExpiredInPeriod" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
<xs:element id="cpk_CostRecoveryStormProtectionPlan" abstract="false" name="CostRecoveryStormProtectionPlan" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
<xs:element id="cpk_NonCashPerformanceIncentivePlanExpenses" abstract="false" name="NonCashPerformanceIncentivePlanExpenses" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
<xs:element id="cpk_MeasuringAndRegulatingStationEquipmentMember" abstract="true" name="MeasuringAndRegulatingStationEquipmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_ComponentsOfIncomeTaxExpenseBenefitTable" abstract="true" name="ComponentsOfIncomeTaxExpenseBenefitTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
<xs:element id="cpk_SummaryOfAccountingPoliciesLineItems" abstract="true" name="SummaryOfAccountingPoliciesLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
<xs:element id="cpk_Numberofcustomers" abstract="false" name="Numberofcustomers" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
<xs:element id="cpk_DisclosureScheduleiiValuationAndQualifyingAccountsAbstract" abstract="true" name="DisclosureScheduleiiValuationAndQualifyingAccountsAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
<xs:element id="cpk_DiversifiedInstrumentsMember" abstract="true" name="DiversifiedInstrumentsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_DisclosureEmployeeBenefitPlansScheduleOfAssetsByInvestmentTypeAbstract" abstract="true" name="DisclosureEmployeeBenefitPlansScheduleOfAssetsByInvestmentTypeAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
<xs:element id="cpk_EastCoastReinforcementProjectsBoyntonBeachMember" abstract="true" name="EastCoastReinforcementProjectsBoyntonBeachMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
<xs:element id="cpk_StockIssuedDuringThePeriodValueRetirementSavingsPlanAndDividendReinvestmentPlan" abstract="false" name="StockIssuedDuringThePeriodValueRetirementSavingsPlanAndDividendReinvestmentPlan" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
<xs:element id="cpk_MarylandDivisionMember" abstract="true" name="MarylandDivisionMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_Operations" abstract="false" name="Operations" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
<xs:element id="cpk_GallonsAcquiredThroughAcquisition" abstract="false" name="GallonsAcquiredThroughAcquisition" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
<xs:element id="cpk_DisclosureGoodwillAndOtherIntangibleAssetsScheduleOfCarryingValueOfGoodwillAbstract" abstract="true" name="DisclosureGoodwillAndOtherIntangibleAssetsScheduleOfCarryingValueOfGoodwillAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
<xs:element id="cpk_EnergyMarketingContractLiabilitiesTotal" abstract="false" name="EnergyMarketingContractLiabilitiesTotal" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
<xs:element id="cpk_AwardstononemployeedirectorsMember" abstract="true" name="AwardstononemployeedirectorsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_ReceivablesAndOtherDeferredCharges" abstract="false" name="ReceivablesAndOtherDeferredCharges" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
<xs:element id="cpk_DisclosureShareBasedCompensationAdditionalInformationAbstract" abstract="true" name="DisclosureShareBasedCompensationAdditionalInformationAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
<xs:element id="cpk_AssetAllocationRangeTableTableTextBlock" abstract="false" name="AssetAllocationRangeTableTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
<xs:element id="cpk_DelawarenaturalgasdivisionMember" abstract="true" name="DelawarenaturalgasdivisionMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_BaseRateIncreaseBaseSAFEInvestmentsTransferToBaseRates" abstract="false" name="BaseRateIncreaseBaseSAFEInvestmentsTransferToBaseRates" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
<xs:element id="cpk_PropertyPlantAndEquipmentDomain" abstract="true" name="PropertyPlantAndEquipmentDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_NaturalGasTransmissionMember" abstract="true" name="NaturalGasTransmissionMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_DisclosureGoodwillAndOtherIntangibleAssetsAdditionalInformationAbstract" abstract="true" name="DisclosureGoodwillAndOtherIntangibleAssetsAdditionalInformationAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
<xs:element id="cpk_UncollateralizedSeniorNoteDueNovemberTwoThousandThirtyNineMember" abstract="true" name="UncollateralizedSeniorNoteDueNovemberTwoThousandThirtyNineMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_UncollateralizedSeniorNoteDueAugustTwoThousandThirtyFiveMember" abstract="true" name="UncollateralizedSeniorNoteDueAugustTwoThousandThirtyFiveMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_DisclosureDerivativeInstrumentsEffectsOfGainsAndLossesFromDerivativeInstrumentsAbstract" abstract="true" name="DisclosureDerivativeInstrumentsEffectsOfGainsAndLossesFromDerivativeInstrumentsAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
<xs:element id="cpk_DisclosureLongTermDebtOutstandingLongTermDebtAbstract" abstract="true" name="DisclosureLongTermDebtOutstandingLongTermDebtAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
<xs:element id="cpk_DeferredPensionSettlementExpense" abstract="false" name="DeferredPensionSettlementExpense" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
<xs:element id="cpk_CumulativeConsolidatedNetIncome" abstract="false" name="CumulativeConsolidatedNetIncome" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
<xs:element id="cpk_DeferredTaxAssetsEnvironmental" abstract="false" name="DeferredTaxAssetsEnvironmental" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
<xs:element id="cpk_AccruedRevenue" abstract="false" name="AccruedRevenue" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
<xs:element id="cpk_OperationsAndMaintenanceExpensePolicyTextBlock" abstract="false" name="OperationsAndMaintenanceExpensePolicyTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
<xs:element id="cpk_CommittedLineofCreditFacilityFourMember" abstract="true" name="CommittedLineofCreditFacilityFourMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_DisclosureShareBasedCompensationPlansSummaryofStockActivityunderSICPKeyemployeesAbstract" abstract="true" name="DisclosureShareBasedCompensationPlansSummaryofStockActivityunderSICPKeyemployeesAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
<xs:element id="cpk_LongTermDebtTotal" abstract="false" name="LongTermDebtTotal" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
<xs:element id="cpk_NaturalGasOperationsMember" abstract="true" name="NaturalGasOperationsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_DiscontinuedOperationGainLossFromDisposalOfDiscontinuedOperationBeforeIncomeTaxIncremental" abstract="false" name="DiscontinuedOperationGainLossFromDisposalOfDiscontinuedOperationBeforeIncomeTaxIncremental" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
<xs:element id="cpk_PermanentRates" abstract="false" name="PermanentRates" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
<xs:element id="cpk_PropaneDeliveryMember" abstract="true" name="PropaneDeliveryMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_DisclosureSupplementalCashFlowDisclosuresNoncashInvestingAndFinancingActivitiesAbstract" abstract="true" name="DisclosureSupplementalCashFlowDisclosuresNoncashInvestingAndFinancingActivitiesAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
<xs:element id="cpk_LineOfCreditFacilityInterestRateDescription1" abstract="false" name="LineOfCreditFacilityInterestRateDescription1" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
<xs:element id="cpk_NetPeriodicCostBenefit" abstract="false" name="NetPeriodicCostBenefit" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
<xs:element id="cpk_AOCIChangesForDefinedBenefitPensionAndPostretirementPlansMember" abstract="true" name="AOCIChangesForDefinedBenefitPensionAndPostretirementPlansMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_DomesticEquitiesMember" abstract="true" name="DomesticEquitiesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_MaturityPeriodToBeConsideredCashEquivalents" abstract="false" name="MaturityPeriodToBeConsideredCashEquivalents" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
<xs:element id="cpk_DefinedBenefitPlanPercentageOfPlanAssetsByInvestmentType" abstract="false" name="DefinedBenefitPlanPercentageOfPlanAssetsByInvestmentType" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
<xs:element id="cpk_NewAccountingPronouncementOfChangeInAccountingPrincipleEffectOfAdoption" abstract="false" name="NewAccountingPronouncementOfChangeInAccountingPrincipleEffectOfAdoption" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
<xs:element id="cpk_DisclosureEmployeeBenefitPlansSummaryOfChangesInFairValueOfLevel3InvestmentsAbstract" abstract="true" name="DisclosureEmployeeBenefitPlansSummaryOfChangesInFairValueOfLevel3InvestmentsAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
<xs:element id="cpk_DeferredStormCostsMember" abstract="true" name="DeferredStormCostsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_IndiantownGasCompanyMember" abstract="true" name="IndiantownGasCompanyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_ProceedsFromDivestitureOfBusinessesIncremental" abstract="false" name="ProceedsFromDivestitureOfBusinessesIncremental" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
<xs:element id="cpk_SharesIssuedPricePerShareAtTheMarket" abstract="false" name="SharesIssuedPricePerShareAtTheMarket" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types1:perShareItemType"/>
<xs:element id="cpk_CompanysExposureInNumberOfFormerManufacturedGasPlantSites" abstract="false" name="CompanysExposureInNumberOfFormerManufacturedGasPlantSites" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
<xs:element id="cpk_DiameterDomain" abstract="true" name="DiameterDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_CostRecoveryCapital" abstract="false" name="CostRecoveryCapital" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
<xs:element id="cpk_DiscontinuedOperationsSupplementalCashFlowsScheduleTableTextBlock" abstract="false" name="DiscontinuedOperationsSupplementalCashFlowsScheduleTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
<xs:element id="cpk_CorporateAndEliminationsMember" abstract="true" name="CorporateAndEliminationsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_UncollateralizedSeniorNoteDueJulyTwoThousandThirtyFiveMember" abstract="true" name="UncollateralizedSeniorNoteDueJulyTwoThousandThirtyFiveMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_RevolvingLineOfCreditShortTermMember" abstract="true" name="RevolvingLineOfCreditShortTermMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_StructuresAndImprovementsMember" abstract="true" name="StructuresAndImprovementsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_DisclosureDerivativeInstrumentsAdditionalInformationAbstract" abstract="true" name="DisclosureDerivativeInstrumentsAdditionalInformationAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
<xs:element id="cpk_BaseRateIncreaseLiquefiedNaturalGasFacility" abstract="false" name="BaseRateIncreaseLiquefiedNaturalGasFacility" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
<xs:element id="cpk_UncollateralizedSeniorNoteDueDecember2033Member" abstract="true" name="UncollateralizedSeniorNoteDueDecember2033Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
<xs:element id="cpk_AggregateInvestmentMaximum" abstract="false" name="AggregateInvestmentMaximum" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
<xs:element id="cpk_DefinedBenefitPlanExpectedFutureBenefitPaymentsMaturityTable" abstract="true" name="DefinedBenefitPlanExpectedFutureBenefitPaymentsMaturityTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
<xs:element id="cpk_UsLargeCapEquitySecuritiesMember" abstract="true" name="UsLargeCapEquitySecuritiesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_LakeWalesPipelineAcquisitionMember" abstract="true" name="LakeWalesPipelineAcquisitionMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_DisclosureOtherCommitmentsAndContingenciesAdditionalInformationAbstract" abstract="true" name="DisclosureOtherCommitmentsAndContingenciesAdditionalInformationAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
<xs:element id="cpk_BaseRateIncrease" abstract="false" name="BaseRateIncrease" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
<xs:element id="cpk_Ratiobasedonaveragenumberofpriorquarters" abstract="false" name="Ratiobasedonaveragenumberofpriorquarters" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
<xs:element id="cpk_ManufacturedGasPlantMember" abstract="true" name="ManufacturedGasPlantMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_NotePurchaseAgreementMember" abstract="true" name="NotePurchaseAgreementMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_MaximumDebtToNetCapitalRatioUnderAgreementTwo" abstract="false" name="MaximumDebtToNetCapitalRatioUnderAgreementTwo" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
<xs:element id="cpk_DisclosureEmployeeBenefitPlansSummaryOfPensionPlanAssetsAbstract" abstract="true" name="DisclosureEmployeeBenefitPlansSummaryOfPensionPlanAssetsAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
<xs:element id="cpk_ReconciliationOfDenominatorAbstract" abstract="true" name="ReconciliationOfDenominatorAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
<xs:element id="cpk_MaximumDaysToMakeDefaultGood" abstract="false" name="MaximumDaysToMakeDefaultGood" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
<xs:element id="cpk_WinterHavenExpansionMember" abstract="true" name="WinterHavenExpansionMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_FloridaNaturalGasDistributionMember" abstract="true" name="FloridaNaturalGasDistributionMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_EnergyMarketingContractsAssetsTotal" abstract="false" name="EnergyMarketingContractsAssetsTotal" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
<xs:element id="cpk_DebtInstrumentRestrictiveCovenantsRequiredNetBookValueofRegulatedBusinessAssetsPercentageofConsolidatedTotalAssets" abstract="false" name="DebtInstrumentRestrictiveCovenantsRequiredNetBookValueofRegulatedBusinessAssetsPercentageofConsolidatedTotalAssets" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
<xs:element id="cpk_TwinLakesExpansionMember" abstract="true" name="TwinLakesExpansionMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_DisclosureDerivativeInstrumentsFairValuesOfDerivativeContractsRecordedInConsolidatedBalanceSheetsAbstract" abstract="true" name="DisclosureDerivativeInstrumentsFairValuesOfDerivativeContractsRecordedInConsolidatedBalanceSheetsAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
<xs:element id="cpk_DeferredCostsMember" abstract="true" name="DeferredCostsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_NetOperatingLossCarryforwardsMember" abstract="true" name="NetOperatingLossCarryforwardsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_UncollateralizedSeniorNoteDueDecember2038Member" abstract="true" name="UncollateralizedSeniorNoteDueDecember2038Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
<xs:element id="cpk_LongtermDebtDebtCovenantsMaximumAllowableAmountofRestrictedPayments" abstract="false" name="LongtermDebtDebtCovenantsMaximumAllowableAmountofRestrictedPayments" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
<xs:element id="cpk_ExtentofCustomersLosingService" abstract="false" name="ExtentofCustomersLosingService" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
<xs:element id="cpk_UnderrecoveredGasAndFuelCostsMember" abstract="true" name="UnderrecoveredGasAndFuelCostsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_BulkPlantStorageAcquiredThroughAcquisition" abstract="false" name="BulkPlantStorageAcquiredThroughAcquisition" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
<xs:element id="cpk_Covid19EffectsTextBlock" abstract="false" name="Covid19EffectsTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
<xs:element id="cpk_SharesIssuedUnderPerformanceIncentivePlanWithheldForEmployeeTaxes" abstract="false" name="SharesIssuedUnderPerformanceIncentivePlanWithheldForEmployeeTaxes" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
<xs:element id="cpk_MetersAndMeterInstallationsMember" abstract="true" name="MetersAndMeterInstallationsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_AnnualRateCaseRecovery" abstract="false" name="AnnualRateCaseRecovery" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
<xs:element id="cpk_UncollateralizedSeniorNoteDueDecember2030Member" abstract="true" name="UncollateralizedSeniorNoteDueDecember2030Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
<xs:element id="cpk_DeferredTaxLiabilitiesLossOnReacquiredDebt" abstract="false" name="DeferredTaxLiabilitiesLossOnReacquiredDebt" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
<xs:element id="cpk_SurchargeStormCostRecovery" abstract="false" name="SurchargeStormCostRecovery" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
<xs:element id="cpk_ChesapeakePensionSerpMember" abstract="true" name="ChesapeakePensionSerpMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_UncollateralizedSeniorNoteDueMarch142038Member" abstract="true" name="UncollateralizedSeniorNoteDueMarch142038Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_PESCOMember" abstract="true" name="PESCOMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_DefinedBenefitPlanExpectedFutureBenefitPaymentsMaturityLineItems" abstract="true" name="DefinedBenefitPlanExpectedFutureBenefitPaymentsMaturityLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
<xs:element id="cpk_AcquisitionresultsTableTextBlock" abstract="false" name="AcquisitionresultsTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
<xs:element id="cpk_RevolvingLineOfCreditLongTermMember" abstract="true" name="RevolvingLineOfCreditLongTermMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_DelmarvaPeninsulaPennsylvaniaandFloridaMember" abstract="true" name="DelmarvaPeninsulaPennsylvaniaandFloridaMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_RegulatoryAssetStormCostRecovery" abstract="false" name="RegulatoryAssetStormCostRecovery" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
<xs:element id="cpk_ProceedsFromPaymentForIssuanceOfCommonStockDividendReinvestmentPlan" abstract="false" name="ProceedsFromPaymentForIssuanceOfCommonStockDividendReinvestmentPlan" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
<xs:element id="cpk_NumberofYearsforAssetManagementAgreement" abstract="false" name="NumberofYearsforAssetManagementAgreement" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
<xs:element id="cpk_TreasuryStockActivityAndDeferredCompensationPlanActivityDuringPeriodValue" abstract="false" name="TreasuryStockActivityAndDeferredCompensationPlanActivityDuringPeriodValue" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
<xs:element id="cpk_TCJAImpactAxis" abstract="true" name="TCJAImpactAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
<xs:element id="cpk_UncollateralizedSeniorNoteDueNovemberTwoThousandThirtyEightMember" abstract="true" name="UncollateralizedSeniorNoteDueNovemberTwoThousandThirtyEightMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_AcquisitionsFloridaCityGasProFormaTableTextBlock" abstract="false" name="AcquisitionsFloridaCityGasProFormaTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
<xs:element id="cpk_AdditionalFirmNaturalGasTransportationDeliverability" abstract="false" name="AdditionalFirmNaturalGasTransportationDeliverability" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
<xs:element id="cpk_JointlyOwnedPipelineMember" abstract="true" name="JointlyOwnedPipelineMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_NaturalGasFuturesMember" abstract="true" name="NaturalGasFuturesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_AccountsReceivableAllowanceForCreditLossesCurrentDisclosure" abstract="false" name="AccountsReceivableAllowanceForCreditLossesCurrentDisclosure" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
<xs:element id="cpk_ForeignEquitiesMember" abstract="true" name="ForeignEquitiesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_CommittedLineofCreditFacilityFiveMember" abstract="true" name="CommittedLineofCreditFacilityFiveMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_DisclosureEnvironmentalCommitmentsAndContingenciesAdditionalInformationAbstract" abstract="true" name="DisclosureEnvironmentalCommitmentsAndContingenciesAdditionalInformationAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
<xs:element id="cpk_CommodityContractCashFlowHedgesAbstract" abstract="true" name="CommodityContractCashFlowHedgesAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
<xs:element id="cpk_RSAM" abstract="false" name="RSAM" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
<xs:element id="cpk_Numberofcustomersacquiredthroughacquisition" abstract="false" name="Numberofcustomersacquiredthroughacquisition" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
<xs:element id="cpk_NumberOfYearstoCollectBenefits" abstract="false" name="NumberOfYearstoCollectBenefits" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
<xs:element id="cpk_FloridaPropaneMember" abstract="true" name="FloridaPropaneMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_GuaranteeTypeAxis" abstract="true" name="GuaranteeTypeAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
<xs:element id="cpk_ChesapeakePensionPlanMember" abstract="true" name="ChesapeakePensionPlanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_MaximumAmountOfEnvironmentalCostsThatCanBeRecoveredFromInsuranceAndCustomers" abstract="false" name="MaximumAmountOfEnvironmentalCostsThatCanBeRecoveredFromInsuranceAndCustomers" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
<xs:element id="cpk_ScheduleofLeasesReportedonConsolidatedStatementofFinancialPositionTableTextBlock" abstract="false" name="ScheduleofLeasesReportedonConsolidatedStatementofFinancialPositionTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
<xs:element id="cpk_AspireMember" abstract="true" name="AspireMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_PeriodofRemainingPerformanceObligationsAxis" abstract="true" name="PeriodofRemainingPerformanceObligationsAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
<xs:element id="cpk_UnderrecoveredGasFuelCosts" abstract="false" name="UnderrecoveredGasFuelCosts" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
<xs:element id="cpk_EnergyDistributionMember" abstract="true" name="EnergyDistributionMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_MilesOfNaturalGasPipeline" abstract="false" name="MilesOfNaturalGasPipeline" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types1:lengthItemType"/>
<xs:element id="cpk_DisclosureSegmentInformationScheduleOfSegmentReportingInformationBySegmentAbstract" abstract="true" name="DisclosureSegmentInformationScheduleOfSegmentReportingInformationBySegmentAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
<xs:element id="cpk_PropaneDistributionMainsMember" abstract="true" name="PropaneDistributionMainsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_AcquisitionAdjustmentMember" abstract="true" name="AcquisitionAdjustmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_DisclosureEmployeeBenefitPlansAmountsInAccumulatedOtherComprehensiveIncomeLossAndRegulatoryAssetAbstract" abstract="true" name="DisclosureEmployeeBenefitPlansAmountsInAccumulatedOtherComprehensiveIncomeLossAndRegulatoryAssetAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
<xs:element id="cpk_AccumulatedGainLossFromInterestRateSwapCashFlowsHedgesMember" abstract="true" name="AccumulatedGainLossFromInterestRateSwapCashFlowsHedgesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_SummaryofEffectsofFederalTaxReformonRegulatedBusinessesTableTextBlock" abstract="false" name="SummaryofEffectsofFederalTaxReformonRegulatedBusinessesTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
<xs:element id="cpk_LesseeFutureOperatingLeaseOptionPayments" abstract="false" name="LesseeFutureOperatingLeaseOptionPayments" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
<xs:element id="cpk_DepreciationAndAccretionIncludedInOtherCosts" abstract="false" name="DepreciationAndAccretionIncludedInOtherCosts" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
<xs:element id="cpk_PrudentialUnfundedCommitmentsMember" abstract="true" name="PrudentialUnfundedCommitmentsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_UncollateralizedSeniorNoteDueOnTwoThousandTwentyMember" abstract="true" name="UncollateralizedSeniorNoteDueOnTwoThousandTwentyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_OtherOperatingRevenue" abstract="false" name="OtherOperatingRevenue" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
<xs:element id="cpk_CapitalExpenditureAbstract" abstract="true" name="CapitalExpenditureAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
<xs:element id="cpk_DeferredTaxAssetSelfInsuranceAccruals" abstract="false" name="DeferredTaxAssetSelfInsuranceAccruals" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
<xs:element id="cpk_EmployeeMinimumAgeToParticipateUnderDefinedContributionPlan" abstract="false" name="EmployeeMinimumAgeToParticipateUnderDefinedContributionPlan" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
<xs:element id="cpk_OtherSegmentsAndIntersegmentsEliminationsMember" abstract="true" name="OtherSegmentsAndIntersegmentsEliminationsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_ScheduleOfAssetAllocationByAssetCategoryTableTableTextBlock" abstract="false" name="ScheduleOfAssetAllocationByAssetCategoryTableTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
<xs:element id="cpk_FPUMedicalPlanandChesapeakeOPRBMember" abstract="true" name="FPUMedicalPlanandChesapeakeOPRBMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_SharpEnergyIncMember" abstract="true" name="SharpEnergyIncMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_UncollateralizedSeniorNotesDueOnTwoThousandTwentyNineMember" abstract="true" name="UncollateralizedSeniorNotesDueOnTwoThousandTwentyNineMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_Lengthoftimeuntildeferredamountsrecoveredorrefunded" abstract="false" name="Lengthoftimeuntildeferredamountsrecoveredorrefunded" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
<xs:element id="cpk_FPUelectricdivisionMember" abstract="true" name="FPUelectricdivisionMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_EastCoastReinforcementProjectsNewSmyrnaBeachMember" abstract="true" name="EastCoastReinforcementProjectsNewSmyrnaBeachMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
<xs:element id="cpk_NaturalgasdistributionoperationsMember" abstract="true" name="NaturalgasdistributionoperationsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_ScheduleOfMaturitiesOfLTDTableTextBlock" abstract="false" name="ScheduleOfMaturitiesOfLTDTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
<xs:element id="cpk_PropaneBulkPlantsAndTanksMember" abstract="true" name="PropaneBulkPlantsAndTanksMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_EnvironmentalCommitmentsAndContingenciesTable" abstract="true" name="EnvironmentalCommitmentsAndContingenciesTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
<xs:element id="cpk_NetOperatingLossesAndTaxCarryforwards" abstract="false" name="NetOperatingLossesAndTaxCarryforwards" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
<xs:element id="cpk_TotalFutureRepayments" abstract="false" name="TotalFutureRepayments" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
<xs:element id="cpk_LongTermDebtAnnualMaturitiesAbstract" abstract="true" name="LongTermDebtAnnualMaturitiesAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
<xs:element id="cpk_TotalMember" abstract="true" name="TotalMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_DisclosureShortTermBorrowingAdditionalInformationAbstract" abstract="true" name="DisclosureShortTermBorrowingAdditionalInformationAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
<xs:element id="cpk_LineOfCreditFacilityInterestRateDescription2" abstract="false" name="LineOfCreditFacilityInterestRateDescription2" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
<xs:element id="cpk_DiversifiedEnergyMember" abstract="true" name="DiversifiedEnergyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_DisclosureIncomeTaxesAdditionalInformationAbstract" abstract="true" name="DisclosureIncomeTaxesAdditionalInformationAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
<xs:element id="cpk_NumberOfShortTermLinesOfCreditRateSwap" abstract="false" name="NumberOfShortTermLinesOfCreditRateSwap" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
<xs:element id="cpk_MarkToMarketEnergyAssetsIncludingPutOptionMember" abstract="true" name="MarkToMarketEnergyAssetsIncludingPutOptionMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedRegulatoryLiabilitiesNoncurrent" abstract="false" name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedRegulatoryLiabilitiesNoncurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
<xs:element id="cpk_CommonStockEquityToTotalCapitalization" abstract="false" name="CommonStockEquityToTotalCapitalization" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
<xs:element id="cpk_DefinedBenefitPlanAlternativeInvestmentsFairValueofPlanAssets" abstract="false" name="DefinedBenefitPlanAlternativeInvestmentsFairValueofPlanAssets" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
<xs:element id="cpk_DisclosureIncomeTaxesSummaryOfReconciliationOfStatutoryFederalTaxAndEffectiveIncomeTaxRatesAbstract" abstract="true" name="DisclosureIncomeTaxesSummaryOfReconciliationOfStatutoryFederalTaxAndEffectiveIncomeTaxRatesAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
<xs:element id="cpk_UnderRecoveredGRIPRevenuesMember" abstract="true" name="UnderRecoveredGRIPRevenuesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_NetOperatingLossesAndTaxCarryback" abstract="false" name="NetOperatingLossesAndTaxCarryback" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
<xs:element id="cpk_FeesOnEquityIssuanceAtTheMarket" abstract="false" name="FeesOnEquityIssuanceAtTheMarket" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
<xs:element id="cpk_DisclosureIncomeTaxesScheduleOfIncomeTaxExpenseAbstract" abstract="true" name="DisclosureIncomeTaxesScheduleOfIncomeTaxExpenseAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
<xs:element id="cpk_DefinedBenefitPlanPostMergerRegulatoryAssets" abstract="false" name="DefinedBenefitPlanPostMergerRegulatoryAssets" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
<xs:element id="cpk_SummaryOfAccountingPoliciesTable" abstract="true" name="SummaryOfAccountingPoliciesTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
<xs:element id="cpk_UncollateralizedSeniorNoteDueDecember2028Member" abstract="true" name="UncollateralizedSeniorNoteDueDecember2028Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
<xs:element id="cpk_PeninsulaPipelineCompanyMember" abstract="true" name="PeninsulaPipelineCompanyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_NumberOfBusinessDays" abstract="false" name="NumberOfBusinessDays" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
<xs:element id="cpk_SeafordMember" abstract="true" name="SeafordMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_RabbiTrustAssociatedWithDeferredCompensationPlanMember" abstract="true" name="RabbiTrustAssociatedWithDeferredCompensationPlanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_AuditorInformationAbstract" abstract="true" name="AuditorInformationAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
<xs:element id="cpk_AwardtokeyemployeesMember" abstract="true" name="AwardtokeyemployeesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_DefinedContributionPlanEligibilityThresholdRequisiteServicePeriod" abstract="false" name="DefinedContributionPlanEligibilityThresholdRequisiteServicePeriod" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
<xs:element id="cpk_AccruedAssetRemovalCostMember" abstract="true" name="AccruedAssetRemovalCostMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_UncollateralizedSeniorNoteDueOnTwoThousandTwentyThreeMember" abstract="true" name="UncollateralizedSeniorNoteDueOnTwoThousandTwentyThreeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_OceanCityMarylandReinforcementMember" abstract="true" name="OceanCityMarylandReinforcementMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
<xs:element id="cpk_InterestRateSwapRateLowRangeMember" abstract="true" name="InterestRateSwapRateLowRangeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_NaturalGasDistributionMember" abstract="true" name="NaturalGasDistributionMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_PensionSettlementExpense" abstract="false" name="PensionSettlementExpense" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
<xs:element id="cpk_PensionAndOtherPostretirementBenefitsMember" abstract="true" name="PensionAndOtherPostretirementBenefitsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
<xs:element id="cpk_StockIssuedDuringThePeriodSharesRetirementSavingsPlanAndDividendReinvestmentPlan" abstract="false" name="StockIssuedDuringThePeriodSharesRetirementSavingsPlanAndDividendReinvestmentPlan" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
<xs:element id="cpk_EasternShoreGasCompanyMember" abstract="true" name="EasternShoreGasCompanyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
</xs:schema>


25 Previous Filings that this Filing References

  As Of               Filer                 Filing    For·On·As Docs:Size             Issuer                      Filing Agent

11/21/23  Chesapeake Utilities Corp.        8-K:1,2,9  11/20/23   11:668K                                   Donnelley … Solutions/FA
11/02/23  Chesapeake Utilities Corp.        10-Q        9/30/23   87:13M                                    Workiva Inc Wde… FA01/FA
 9/27/23  Chesapeake Utilities Corp.        8-K:1,7,9   9/26/23   13:3.5M                                   Donnelley … Solutions/FA
 5/03/23  Chesapeake Utilities Corp.        S-8         5/03/23    5:191K                                   Donnelley … Solutions/FA
 5/03/23  Chesapeake Utilities Corp.        8-K:5,9     5/03/23   11:259K                                   Donnelley … Solutions/FA
 2/22/23  Chesapeake Utilities Corp.        10-K       12/31/22  139:21M                                    Workiva Inc Wde… FA01/FA
 2/23/22  Chesapeake Utilities Corp.        10-K       12/31/21  145:23M                                    Workiva Inc Wde… FA01/FA
12/20/21  Chesapeake Utilities Corp.        8-K:5,7,8,912/16/21   16:792K                                   Donnelley … Solutions/FA
11/03/21  Chesapeake Utilities Corp.        10-Q        9/30/21   93:16M                                    Workiva Inc Wde… FA01/FA
11/05/20  Chesapeake Utilities Corp.        10-Q        9/30/20   96:55M                                    Workiva Inc Wde… FA01/FA
 8/05/20  Chesapeake Utilities Corp.        10-Q        6/30/20  100:18M                                    Workiva Inc Wde… FA01/FA
 5/06/20  Chesapeake Utilities Corp.        10-Q        3/31/20  104:14M                                    Workiva Inc Wde… FA01/FA
 2/26/20  Chesapeake Utilities Corp.        10-K       12/31/19  151:25M                                    Workiva Inc Wde… FA01/FA
11/20/19  Chesapeake Utilities Corp.        8-K:1,2    11/19/19   10:143K                                   Donnelley … Solutions/FA
11/07/19  Chesapeake Utilities Corp.        10-Q        9/30/19   96:17M                                    Workiva Inc Wde… FA01/FA
 2/27/19  Chesapeake Utilities Corp.        10-K       12/31/18  145:21M                                    Workiva Inc Wde… FA01/FA
 3/01/18  Chesapeake Utilities Corp.        10-K       12/31/17  131:19M                                    Workiva Inc Wde… FA01/FA
 5/09/17  Chesapeake Utilities Corp.        8-K:5       5/03/17    2:46K                                    Workiva Inc Wde… FA01/FA
 2/29/16  Chesapeake Utilities Corp.        10-K       12/31/15  128:19M                                    Workiva Inc Wde… FA01/FA
11/05/15  Chesapeake Utilities Corp.        10-Q        9/30/15   83:67M                                    Workiva Inc Wde… FA01/FA
 3/31/15  Chesapeake Utilities Corp.        DEF 14A     5/06/15    1:1.9M                                   DG3/FA
 3/06/14  Chesapeake Utilities Corp.        10-K       12/31/13  131:24M                                    Workiva Inc.
 3/08/11  Chesapeake Utilities Corp.        10-K       12/31/10   18:1.8M                                   Donnelley … Solutions/FA
 8/05/10  Chesapeake Utilities Corp.        10-Q        6/30/10    6:750K                                   Bowne - BPC/FA
 3/09/09  Chesapeake Utilities Corp.        10-K       12/31/08   20:2M                                     Bowne - BPC/FA
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Filing Submission 0001628280-24-005944   –   Alternative Formats (Word / Rich Text, HTML, Plain Text, et al.)

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