"You are an auditor for XBRL filings. \nGiven two concepts and the provided filing (schema, presentation, calculation, definition, label, instance, and US GAAP taxonomy),\ndetermine which one of the following erroneous relationship types best describes the relationship between the two concepts:\n\n(1) Reversal  \n    Definition: A relationship is flagged as Reversal when the filer\u2019s extension taxonomy redefines element hierarchy inconsistently with the US GAAP taxonomy. Specifically, this occurs when an element that should be a sibling in the US GAAP taxonomy is instead defined as a child of another element (or vice versa, a child element is incorrectly redefined as a sibling).\n\n(2) Inappropriateness  \n    Definition: A relationship is flagged as Inappropriateness when elements appear under an abstract category where they do not belong, contrary to the US GAAP taxonomy.\n\n(3) CombinationErr  \n    Definition: A relationship is flagged as CombinationErr when an axis in the filer\u2019s extension taxonomy is associated with inappropriate members not permitted by the US GAAP taxonomy.\n\nYou must reference the US GAAP taxonomy to retrieve and check the two concepts across the entire filing.\nOutput only one of the following labels exactly, chosen strictly from:\n[\"Reversal\", \"Inappropriateness\", \"CombinationErr\"].\n\nNo explanations. No extra text. Only the label.\n\n    \n##Schema document\nNone\n\n##Presentation linkbase document\n<?xml version='1.0' encoding='US-ASCII'?>\n<link:linkbase xmlns:link=\"http://www.xbrl.org/2003/linkbase\" xmlns:xlink=\"http://www.w3.org/1999/xlink\" xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" xsi:schemaLocation=\"http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd\"><link:roleRef roleURI=\"http://www.chpk.com/role/SegmentInformationScheduleofSegmentReportingInformationbySegmentDetail\" xlink:type=\"simple\" xlink:href=\"cpk-20221231.xsd#SegmentInformationScheduleofSegmentReportingInformationbySegmentDetail\"/>\n  <link:presentationLink xlink:role=\"http://www.chpk.com/role/SegmentInformationScheduleofSegmentReportingInformationbySegmentDetail\" xlink:type=\"extended\">\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_cpk_DisclosureSegmentInformationScheduleOfSegmentReportingInformationBySegmentAbstract_411330e4-c01a-4436-aa9d-19a4f04ec34e\" 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xlink:to=\"loc_us-gaap_IncomeLossFromContinuingOperations_34dfbd6e-3dc8-45e2-a919-84f90105392f\" xlink:type=\"arc\" preferredLabel=\"http://www.xbrl.org/2003/role/terseLabel\"/>\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_us-gaap_NetIncomeLoss_90f0ed9a-c836-4df9-8b4c-be0d315f1381\" xlink:href=\"https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_NetIncomeLoss\"/>\n    <link:presentationArc order=\"9\" xlink:arcrole=\"http://www.xbrl.org/2003/arcrole/parent-child\" xlink:from=\"loc_us-gaap_SegmentReportingInformationLineItems_6c28c897-b31f-4034-a63e-c595e2299874\" xlink:to=\"loc_us-gaap_NetIncomeLoss_90f0ed9a-c836-4df9-8b4c-be0d315f1381\" xlink:type=\"arc\" preferredLabel=\"http://www.xbrl.org/2003/role/terseLabel\"/>\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity_a556dc07-2f0b-453d-b210-fe5b33f3f1e5\" 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xlink:arcrole=\"http://www.xbrl.org/2003/arcrole/parent-child\" xlink:from=\"loc_us-gaap_SegmentReportingInformationLineItems_6c28c897-b31f-4034-a63e-c595e2299874\" xlink:to=\"loc_us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax_6d4e9afb-df72-4e1d-90ad-b71af1f390ee\" xlink:type=\"arc\" preferredLabel=\"http://www.xbrl.org/2003/role/terseLabel\"/>\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_us-gaap_DepreciationAndAmortizationAbstract_00c5d47a-79a6-4943-ba1c-c51c797ddbbb\" xlink:href=\"https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DepreciationAndAmortizationAbstract\"/>\n    <link:presentationArc order=\"12\" xlink:arcrole=\"http://www.xbrl.org/2003/arcrole/parent-child\" xlink:from=\"loc_us-gaap_SegmentReportingInformationLineItems_6c28c897-b31f-4034-a63e-c595e2299874\" xlink:to=\"loc_us-gaap_DepreciationAndAmortizationAbstract_00c5d47a-79a6-4943-ba1c-c51c797ddbbb\" xlink:type=\"arc\" preferredLabel=\"http://www.xbrl.org/2003/role/terseLabel\"/>\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_us-gaap_DepreciationDepletionAndAmortization_200f5ba2-2dbc-46c7-9f54-99a1daf27b8a\" xlink:href=\"https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DepreciationDepletionAndAmortization\"/>\n    <link:presentationArc order=\"1\" xlink:arcrole=\"http://www.xbrl.org/2003/arcrole/parent-child\" xlink:from=\"loc_us-gaap_DepreciationAndAmortizationAbstract_00c5d47a-79a6-4943-ba1c-c51c797ddbbb\" xlink:to=\"loc_us-gaap_DepreciationDepletionAndAmortization_200f5ba2-2dbc-46c7-9f54-99a1daf27b8a\" xlink:type=\"arc\" preferredLabel=\"http://www.xbrl.org/2003/role/verboseLabel\"/>\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_us-gaap_PaymentsToAcquireProductiveAssets_2a5ca38f-0653-400d-9182-6cc1b58a8fcb\" xlink:href=\"https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PaymentsToAcquireProductiveAssets\"/>\n    <link:presentationArc order=\"13\" xlink:arcrole=\"http://www.xbrl.org/2003/arcrole/parent-child\" xlink:from=\"loc_us-gaap_SegmentReportingInformationLineItems_6c28c897-b31f-4034-a63e-c595e2299874\" xlink:to=\"loc_us-gaap_PaymentsToAcquireProductiveAssets_2a5ca38f-0653-400d-9182-6cc1b58a8fcb\" xlink:type=\"arc\" preferredLabel=\"http://www.xbrl.org/2003/role/terseLabel\"/>\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_cpk_CapitalExpenditureAbstract_1a076682-b2d7-4517-a3da-c66851902b06\" xlink:href=\"cpk-20221231.xsd#cpk_CapitalExpenditureAbstract\"/>\n    <link:presentationArc order=\"14\" xlink:arcrole=\"http://www.xbrl.org/2003/arcrole/parent-child\" xlink:from=\"loc_us-gaap_SegmentReportingInformationLineItems_6c28c897-b31f-4034-a63e-c595e2299874\" xlink:to=\"loc_cpk_CapitalExpenditureAbstract_1a076682-b2d7-4517-a3da-c66851902b06\" xlink:type=\"arc\" preferredLabel=\"http://www.xbrl.org/2003/role/terseLabel\"/>\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_us-gaap_AssetsAbstract_03307882-9835-4801-a5e1-4ecc26e67148\" xlink:href=\"https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AssetsAbstract\"/>\n    <link:presentationArc order=\"15\" xlink:arcrole=\"http://www.xbrl.org/2003/arcrole/parent-child\" xlink:from=\"loc_us-gaap_SegmentReportingInformationLineItems_6c28c897-b31f-4034-a63e-c595e2299874\" xlink:to=\"loc_us-gaap_AssetsAbstract_03307882-9835-4801-a5e1-4ecc26e67148\" xlink:type=\"arc\" preferredLabel=\"http://www.xbrl.org/2003/role/terseLabel\"/>\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_us-gaap_Assets_ac414f07-fb65-4da1-a0ce-3794e630fdf9\" xlink:href=\"https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_Assets\"/>\n    <link:presentationArc order=\"1\" xlink:arcrole=\"http://www.xbrl.org/2003/arcrole/parent-child\" xlink:from=\"loc_us-gaap_AssetsAbstract_03307882-9835-4801-a5e1-4ecc26e67148\" xlink:to=\"loc_us-gaap_Assets_ac414f07-fb65-4da1-a0ce-3794e630fdf9\" 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xlink:role=\"http://www.chpk.com/role/SegmentInformationScheduleofSegmentReportingInformationbySegmentDetail\" xlink:type=\"extended\" id=\"ic5bdc165a63e43b1929882a1f1e118e3_SegmentInformationScheduleofSegmentReportingInformationbySegmentDetail\">\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_us-gaap_SegmentReportingInformationLineItems_6c28c897-b31f-4034-a63e-c595e2299874\" xlink:href=\"https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SegmentReportingInformationLineItems\"/>\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_cpk_OperatingRevenuesUnaffiliatedCustomersAbstract_e10036d7-a193-49b6-8f10-7c37c9c652fa\" xlink:href=\"cpk-20221231.xsd#cpk_OperatingRevenuesUnaffiliatedCustomersAbstract\"/>\n    <link:definitionArc xlink:arcrole=\"http://xbrl.org/int/dim/arcrole/domain-member\" xlink:from=\"loc_us-gaap_SegmentReportingInformationLineItems_6c28c897-b31f-4034-a63e-c595e2299874\" 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xlink:from=\"loc_us-gaap_AssetsAbstract_03307882-9835-4801-a5e1-4ecc26e67148\" xlink:to=\"loc_us-gaap_Assets_ac414f07-fb65-4da1-a0ce-3794e630fdf9\" xlink:type=\"arc\" order=\"1\"/>\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax_ee19a0a8-6b1f-41cb-854b-24ff9c5ddfe8\" xlink:href=\"https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax\"/>\n    <link:definitionArc xlink:arcrole=\"http://xbrl.org/int/dim/arcrole/domain-member\" xlink:from=\"loc_us-gaap_SegmentReportingInformationLineItems_6c28c897-b31f-4034-a63e-c595e2299874\" xlink:to=\"loc_us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax_ee19a0a8-6b1f-41cb-854b-24ff9c5ddfe8\" xlink:type=\"arc\" order=\"15\"/>\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_a20a6b02-0a12-4f22-ad9f-1fe6c15a438e\" xlink:href=\"https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable\"/>\n    <link:definitionArc xlink:arcrole=\"http://xbrl.org/int/dim/arcrole/all\" xlink:from=\"loc_us-gaap_SegmentReportingInformationLineItems_6c28c897-b31f-4034-a63e-c595e2299874\" xlink:to=\"loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_a20a6b02-0a12-4f22-ad9f-1fe6c15a438e\" xlink:type=\"arc\" order=\"1\" xbrldt:closed=\"true\" xbrldt:contextElement=\"segment\"/>\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_srt_ConsolidationItemsAxis_09579f8b-f428-4b98-be21-688a32ea1530\" xlink:href=\"https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_ConsolidationItemsAxis\"/>\n    <link:definitionArc xlink:arcrole=\"http://xbrl.org/int/dim/arcrole/hypercube-dimension\" 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xlink:href=\"https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IntersegmentEliminationMember\"/>\n    <link:definitionArc xlink:arcrole=\"http://xbrl.org/int/dim/arcrole/domain-member\" xlink:from=\"loc_srt_ConsolidationItemsDomain_2e34c8c0-d158-42a1-a6b7-ff01055530f2\" xlink:to=\"loc_us-gaap_IntersegmentEliminationMember_a4793dc3-adac-4f3d-a056-fd77962dede4\" xlink:type=\"arc\" order=\"1\"/>\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_cpk_CorporateAndEliminationsMember_fa22f009-582d-40af-8434-74bcb05bd56b\" xlink:href=\"cpk-20221231.xsd#cpk_CorporateAndEliminationsMember\"/>\n    <link:definitionArc xlink:arcrole=\"http://xbrl.org/int/dim/arcrole/domain-member\" xlink:from=\"loc_srt_ConsolidationItemsDomain_2e34c8c0-d158-42a1-a6b7-ff01055530f2\" xlink:to=\"loc_cpk_CorporateAndEliminationsMember_fa22f009-582d-40af-8434-74bcb05bd56b\" xlink:type=\"arc\" order=\"2\"/>\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_us-gaap_StatementBusinessSegmentsAxis_a4a22c50-44bb-485c-b8b3-13c180e16104\" xlink:href=\"https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StatementBusinessSegmentsAxis\"/>\n    <link:definitionArc xlink:arcrole=\"http://xbrl.org/int/dim/arcrole/hypercube-dimension\" xlink:from=\"loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_a20a6b02-0a12-4f22-ad9f-1fe6c15a438e\" xlink:to=\"loc_us-gaap_StatementBusinessSegmentsAxis_a4a22c50-44bb-485c-b8b3-13c180e16104\" xlink:type=\"arc\" order=\"2\"/>\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_us-gaap_SegmentDomain_a4a22c50-44bb-485c-b8b3-13c180e16104_default\" xlink:href=\"https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SegmentDomain\"/>\n    <link:definitionArc xlink:arcrole=\"http://xbrl.org/int/dim/arcrole/dimension-default\" xlink:from=\"loc_us-gaap_StatementBusinessSegmentsAxis_a4a22c50-44bb-485c-b8b3-13c180e16104\" xlink:to=\"loc_us-gaap_SegmentDomain_a4a22c50-44bb-485c-b8b3-13c180e16104_default\" xlink:type=\"arc\" order=\"1\"/>\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_us-gaap_SegmentDomain_1d7484da-eea2-4962-9bae-53c510f731b5\" xlink:href=\"https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SegmentDomain\"/>\n    <link:definitionArc xlink:arcrole=\"http://xbrl.org/int/dim/arcrole/dimension-domain\" xlink:from=\"loc_us-gaap_StatementBusinessSegmentsAxis_a4a22c50-44bb-485c-b8b3-13c180e16104\" xlink:to=\"loc_us-gaap_SegmentDomain_1d7484da-eea2-4962-9bae-53c510f731b5\" xlink:type=\"arc\" order=\"1\"/>\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_cpk_RegulatedEnergyMember_de8ef61b-e1e6-4810-9084-6fb0e0dd15dd\" xlink:href=\"cpk-20221231.xsd#cpk_RegulatedEnergyMember\"/>\n    <link:definitionArc xlink:arcrole=\"http://xbrl.org/int/dim/arcrole/domain-member\" xlink:from=\"loc_us-gaap_SegmentDomain_1d7484da-eea2-4962-9bae-53c510f731b5\" 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xlink:to=\"loc_us-gaap_AllOtherSegmentsMember_be7df8ee-f46a-4597-a261-3a6e089646f2\" xlink:type=\"arc\" order=\"2\"/>\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_cpk_OtherSegmentsAndIntersegmentsEliminationsMember_5b320863-78ef-4428-8d08-265c3a48bbef\" xlink:href=\"cpk-20221231.xsd#cpk_OtherSegmentsAndIntersegmentsEliminationsMember\"/>\n    <link:definitionArc xlink:arcrole=\"http://xbrl.org/int/dim/arcrole/domain-member\" xlink:from=\"loc_us-gaap_SegmentDomain_1d7484da-eea2-4962-9bae-53c510f731b5\" xlink:to=\"loc_cpk_OtherSegmentsAndIntersegmentsEliminationsMember_5b320863-78ef-4428-8d08-265c3a48bbef\" xlink:type=\"arc\" order=\"3\"/>\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_cpk_TotalforSegmentsMember_59347376-8b52-4630-8828-fb9fcda97665\" xlink:href=\"cpk-20221231.xsd#cpk_TotalforSegmentsMember\"/>\n    <link:definitionArc xlink:arcrole=\"http://xbrl.org/int/dim/arcrole/domain-member\" 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xlink:href=\"http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedPeriodEndLabel\"/>\n  <link:roleRef roleURI=\"http://www.xbrl.org/2009/role/negatedLabel\" xlink:type=\"simple\" xlink:href=\"http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedLabel\"/>\n  <link:roleRef roleURI=\"http://www.xbrl.org/2009/role/negatedTotalLabel\" xlink:type=\"simple\" xlink:href=\"http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedTotalLabel\"/>\n  <link:labelLink xlink:role=\"http://www.xbrl.org/2003/role/link\" xlink:type=\"extended\"><link:loc xlink:type=\"locator\" xlink:label=\"loc_us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax\" xlink:href=\"https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax\"/>\n    <link:labelArc xlink:arcrole=\"http://www.xbrl.org/2003/arcrole/concept-label\" xlink:from=\"loc_us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax\" xlink:to=\"lab_us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax\" xlink:type=\"arc\" order=\"1\"/>\n    <link:label id=\"lab_us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax_edebf3b5-ddc3-409c-a21d-12f84b236793_terseLabel_en-US\" xlink:label=\"lab_us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax\" xlink:role=\"http://www.xbrl.org/2003/role/terseLabel\" xlink:type=\"resource\" xml:lang=\"en-US\">Discontinued Operation, Income (Loss) from Discontinued Operation During Phase-out Period, Net of Tax</link:label>\n    <link:label id=\"lab_us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax_label_en-US\" 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xlink:href=\"https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OperatingIncomeLoss\"/>\n    <link:labelArc xlink:arcrole=\"http://www.xbrl.org/2003/arcrole/concept-label\" xlink:from=\"loc_us-gaap_OperatingIncomeLoss\" xlink:to=\"lab_us-gaap_OperatingIncomeLoss\" xlink:type=\"arc\" order=\"1\"/>\n    <link:label id=\"lab_us-gaap_OperatingIncomeLoss_66ef4b2e-2c48-4813-a526-b364720e054c_totalLabel_en-US\" xlink:label=\"lab_us-gaap_OperatingIncomeLoss\" xlink:role=\"http://www.xbrl.org/2003/role/totalLabel\" xlink:type=\"resource\" xml:lang=\"en-US\">Operating Income</link:label>\n    <link:label id=\"lab_us-gaap_OperatingIncomeLoss_4c0173e7-8605-4f6a-978e-66c8a82802b5_verboseLabel_en-US\" xlink:label=\"lab_us-gaap_OperatingIncomeLoss\" xlink:role=\"http://www.xbrl.org/2003/role/verboseLabel\" xlink:type=\"resource\" xml:lang=\"en-US\">Operating Income (Loss)</link:label>\n    <link:label id=\"lab_us-gaap_OperatingIncomeLoss_b5ecaca1-19ad-4994-8e01-a3b7e8c19b23_terseLabel_en-US\" xlink:label=\"lab_us-gaap_OperatingIncomeLoss\" xlink:role=\"http://www.xbrl.org/2003/role/terseLabel\" xlink:type=\"resource\" xml:lang=\"en-US\">Operating Income</link:label>\n    <link:label id=\"lab_us-gaap_OperatingIncomeLoss_label_en-US\" xlink:label=\"lab_us-gaap_OperatingIncomeLoss\" xlink:role=\"http://www.xbrl.org/2003/role/label\" xlink:type=\"resource\" xml:lang=\"en-US\">Operating Income (Loss)</link:label>\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_cpk_OtherMember\" xlink:href=\"cpk-20221231.xsd#cpk_OtherMember\"/>\n    <link:labelArc xlink:arcrole=\"http://www.xbrl.org/2003/arcrole/concept-label\" xlink:from=\"loc_cpk_OtherMember\" xlink:to=\"lab_cpk_OtherMember\" xlink:type=\"arc\" order=\"1\"/>\n    <link:label id=\"lab_cpk_OtherMember_171bb4c8-c959-4930-91a1-4b1946d262a5_terseLabel_en-US\" xlink:label=\"lab_cpk_OtherMember\" xlink:role=\"http://www.xbrl.org/2003/role/terseLabel\" xlink:type=\"resource\" xml:lang=\"en-US\">Other [Member]</link:label>\n    <link:label id=\"lab_cpk_OtherMember_label_en-US\" xlink:label=\"lab_cpk_OtherMember\" xlink:role=\"http://www.xbrl.org/2003/role/label\" xlink:type=\"resource\" xml:lang=\"en-US\">Other [Member]</link:label>\n    <link:label id=\"lab_cpk_OtherMember_documentation_en-US\" xlink:label=\"lab_cpk_OtherMember\" xlink:role=\"http://www.xbrl.org/2003/role/documentation\" xlink:type=\"resource\" xml:lang=\"en-US\">Other [Member]</link:label>\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_cpk_RegulatedEnergyMember\" xlink:href=\"cpk-20221231.xsd#cpk_RegulatedEnergyMember\"/>\n    <link:labelArc xlink:arcrole=\"http://www.xbrl.org/2003/arcrole/concept-label\" xlink:from=\"loc_cpk_RegulatedEnergyMember\" xlink:to=\"lab_cpk_RegulatedEnergyMember\" xlink:type=\"arc\" order=\"1\"/>\n    <link:label id=\"lab_cpk_RegulatedEnergyMember_b7d01a4a-85fc-4295-a682-69098597a31d_terseLabel_en-US\" xlink:label=\"lab_cpk_RegulatedEnergyMember\" xlink:role=\"http://www.xbrl.org/2003/role/terseLabel\" xlink:type=\"resource\" xml:lang=\"en-US\">Regulated Energy [Member]</link:label>\n    <link:label id=\"lab_cpk_RegulatedEnergyMember_9359efef-9439-43d4-b9d6-bba7e97ba678_netLabel_en-US\" xlink:label=\"lab_cpk_RegulatedEnergyMember\" xlink:role=\"http://www.xbrl.org/2009/role/netLabel\" xlink:type=\"resource\" xml:lang=\"en-US\">Regulated Energy</link:label>\n    <link:label id=\"lab_cpk_RegulatedEnergyMember_232b691d-16c9-41fc-be6c-e0c52fd0dbfd_verboseLabel_en-US\" xlink:label=\"lab_cpk_RegulatedEnergyMember\" xlink:role=\"http://www.xbrl.org/2003/role/verboseLabel\" xlink:type=\"resource\" xml:lang=\"en-US\">Regulated Energy</link:label>\n    <link:label id=\"lab_cpk_RegulatedEnergyMember_label_en-US\" xlink:label=\"lab_cpk_RegulatedEnergyMember\" xlink:role=\"http://www.xbrl.org/2003/role/label\" xlink:type=\"resource\" xml:lang=\"en-US\">Regulated Energy [Member]</link:label>\n    <link:label id=\"lab_cpk_RegulatedEnergyMember_documentation_en-US\" xlink:label=\"lab_cpk_RegulatedEnergyMember\" xlink:role=\"http://www.xbrl.org/2003/role/documentation\" xlink:type=\"resource\" xml:lang=\"en-US\">Regulated energy.</link:label>\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_us-gaap_SegmentDomain\" xlink:href=\"https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SegmentDomain\"/>\n    <link:labelArc xlink:arcrole=\"http://www.xbrl.org/2003/arcrole/concept-label\" xlink:from=\"loc_us-gaap_SegmentDomain\" xlink:to=\"lab_us-gaap_SegmentDomain\" xlink:type=\"arc\" order=\"1\"/>\n    <link:label id=\"lab_us-gaap_SegmentDomain_e1b2c73a-9f0a-4761-9aef-436b56fe8d04_terseLabel_en-US\" xlink:label=\"lab_us-gaap_SegmentDomain\" xlink:role=\"http://www.xbrl.org/2003/role/terseLabel\" xlink:type=\"resource\" xml:lang=\"en-US\">Segments [Domain]</link:label>\n    <link:label id=\"lab_us-gaap_SegmentDomain_828c6e3e-6732-48a5-8c47-e897ea6a1563_verboseLabel_en-US\" xlink:label=\"lab_us-gaap_SegmentDomain\" xlink:role=\"http://www.xbrl.org/2003/role/verboseLabel\" xlink:type=\"resource\" xml:lang=\"en-US\">Segment [Domain]</link:label>\n    <link:label id=\"lab_us-gaap_SegmentDomain_label_en-US\" xlink:label=\"lab_us-gaap_SegmentDomain\" xlink:role=\"http://www.xbrl.org/2003/role/label\" xlink:type=\"resource\" xml:lang=\"en-US\">Segments [Domain]</link:label>\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_cpk_CapitalExpenditureAbstract\" xlink:href=\"cpk-20221231.xsd#cpk_CapitalExpenditureAbstract\"/>\n    <link:labelArc xlink:arcrole=\"http://www.xbrl.org/2003/arcrole/concept-label\" xlink:from=\"loc_cpk_CapitalExpenditureAbstract\" xlink:to=\"lab_cpk_CapitalExpenditureAbstract\" xlink:type=\"arc\" order=\"1\"/>\n    <link:label id=\"lab_cpk_CapitalExpenditureAbstract_f5ce5e43-22d0-4c9f-9657-a2152d36a178_terseLabel_en-US\" xlink:label=\"lab_cpk_CapitalExpenditureAbstract\" xlink:role=\"http://www.xbrl.org/2003/role/terseLabel\" xlink:type=\"resource\" xml:lang=\"en-US\">Capital Expenditures</link:label>\n    <link:label id=\"lab_cpk_CapitalExpenditureAbstract_label_en-US\" xlink:label=\"lab_cpk_CapitalExpenditureAbstract\" xlink:role=\"http://www.xbrl.org/2003/role/label\" xlink:type=\"resource\" xml:lang=\"en-US\">Capital Expenditure [Abstract]</link:label>\n    <link:label id=\"lab_cpk_CapitalExpenditureAbstract_documentation_en-US\" xlink:label=\"lab_cpk_CapitalExpenditureAbstract\" xlink:role=\"http://www.xbrl.org/2003/role/documentation\" xlink:type=\"resource\" xml:lang=\"en-US\">Capital Expenditure [Abstract]</link:label>\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_us-gaap_NetIncomeLoss\" xlink:href=\"https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_NetIncomeLoss\"/>\n    <link:labelArc xlink:arcrole=\"http://www.xbrl.org/2003/arcrole/concept-label\" xlink:from=\"loc_us-gaap_NetIncomeLoss\" xlink:to=\"lab_us-gaap_NetIncomeLoss\" xlink:type=\"arc\" order=\"1\"/>\n    <link:label id=\"lab_us-gaap_NetIncomeLoss_92c42202-a1ad-45c0-8373-f6bdb5f9454c_totalLabel_en-US\" xlink:label=\"lab_us-gaap_NetIncomeLoss\" xlink:role=\"http://www.xbrl.org/2003/role/totalLabel\" xlink:type=\"resource\" xml:lang=\"en-US\">Net Income (Loss) Attributable to Parent</link:label>\n    <link:label id=\"lab_us-gaap_NetIncomeLoss_525f7536-1a0c-4bbe-9da1-8a1c8403ce34_terseLabel_en-US\" xlink:label=\"lab_us-gaap_NetIncomeLoss\" xlink:role=\"http://www.xbrl.org/2003/role/terseLabel\" xlink:type=\"resource\" xml:lang=\"en-US\">Net Income</link:label>\n    <link:label id=\"lab_us-gaap_NetIncomeLoss_label_en-US\" xlink:label=\"lab_us-gaap_NetIncomeLoss\" xlink:role=\"http://www.xbrl.org/2003/role/label\" xlink:type=\"resource\" xml:lang=\"en-US\">Net Income (Loss) Attributable to Parent</link:label>\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax\" xlink:href=\"https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax\"/>\n    <link:labelArc xlink:arcrole=\"http://www.xbrl.org/2003/arcrole/concept-label\" xlink:from=\"loc_us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax\" xlink:to=\"lab_us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax\" xlink:type=\"arc\" order=\"1\"/>\n    <link:label id=\"lab_us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax_02319130-9065-4171-8c17-fba33cd43142_terseLabel_en-US\" xlink:label=\"lab_us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax\" xlink:role=\"http://www.xbrl.org/2003/role/terseLabel\" xlink:type=\"resource\" xml:lang=\"en-US\">Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax</link:label>\n    <link:label id=\"lab_us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax_label_en-US\" xlink:label=\"lab_us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax\" xlink:role=\"http://www.xbrl.org/2003/role/label\" xlink:type=\"resource\" xml:lang=\"en-US\">Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax</link:label>\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_us-gaap_IntersegmentEliminationMember\" xlink:href=\"https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IntersegmentEliminationMember\"/>\n    <link:labelArc xlink:arcrole=\"http://www.xbrl.org/2003/arcrole/concept-label\" xlink:from=\"loc_us-gaap_IntersegmentEliminationMember\" xlink:to=\"lab_us-gaap_IntersegmentEliminationMember\" xlink:type=\"arc\" order=\"1\"/>\n    <link:label id=\"lab_us-gaap_IntersegmentEliminationMember_9316bb12-0895-4ac6-9375-a393ecc48514_terseLabel_en-US\" xlink:label=\"lab_us-gaap_IntersegmentEliminationMember\" xlink:role=\"http://www.xbrl.org/2003/role/terseLabel\" xlink:type=\"resource\" xml:lang=\"en-US\">Intersegment Eliminations</link:label>\n    <link:label id=\"lab_us-gaap_IntersegmentEliminationMember_label_en-US\" xlink:label=\"lab_us-gaap_IntersegmentEliminationMember\" xlink:role=\"http://www.xbrl.org/2003/role/label\" xlink:type=\"resource\" xml:lang=\"en-US\">Intersegment Eliminations [Member]</link:label>\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_us-gaap_UnregulatedOperationMember\" xlink:href=\"https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_UnregulatedOperationMember\"/>\n    <link:labelArc xlink:arcrole=\"http://www.xbrl.org/2003/arcrole/concept-label\" xlink:from=\"loc_us-gaap_UnregulatedOperationMember\" xlink:to=\"lab_us-gaap_UnregulatedOperationMember\" xlink:type=\"arc\" order=\"1\"/>\n    <link:label id=\"lab_us-gaap_UnregulatedOperationMember_da797666-9c13-4dd6-bc3d-8ebd146b962f_terseLabel_en-US\" xlink:label=\"lab_us-gaap_UnregulatedOperationMember\" xlink:role=\"http://www.xbrl.org/2003/role/terseLabel\" xlink:type=\"resource\" xml:lang=\"en-US\">Unregulated Operation</link:label>\n    <link:label id=\"lab_us-gaap_UnregulatedOperationMember_label_en-US\" xlink:label=\"lab_us-gaap_UnregulatedOperationMember\" xlink:role=\"http://www.xbrl.org/2003/role/label\" xlink:type=\"resource\" xml:lang=\"en-US\">Unregulated Operation [Member]</link:label>\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_cpk_OtherSegmentsAndIntersegmentsEliminationsMember\" xlink:href=\"cpk-20221231.xsd#cpk_OtherSegmentsAndIntersegmentsEliminationsMember\"/>\n    <link:labelArc xlink:arcrole=\"http://www.xbrl.org/2003/arcrole/concept-label\" xlink:from=\"loc_cpk_OtherSegmentsAndIntersegmentsEliminationsMember\" xlink:to=\"lab_cpk_OtherSegmentsAndIntersegmentsEliminationsMember\" xlink:type=\"arc\" order=\"1\"/>\n    <link:label id=\"lab_cpk_OtherSegmentsAndIntersegmentsEliminationsMember_e665bcc0-59d7-469d-9ded-5581da43b445_terseLabel_en-US\" xlink:label=\"lab_cpk_OtherSegmentsAndIntersegmentsEliminationsMember\" xlink:role=\"http://www.xbrl.org/2003/role/terseLabel\" xlink:type=\"resource\" xml:lang=\"en-US\">Other Segments And Intersegments Eliminations [Member]</link:label>\n    <link:label id=\"lab_cpk_OtherSegmentsAndIntersegmentsEliminationsMember_b53a2c7b-a3e9-4027-89e9-2bcb78e181f1_verboseLabel_en-US\" xlink:label=\"lab_cpk_OtherSegmentsAndIntersegmentsEliminationsMember\" xlink:role=\"http://www.xbrl.org/2003/role/verboseLabel\" xlink:type=\"resource\" xml:lang=\"en-US\">Other and eliminations</link:label>\n    <link:label id=\"lab_cpk_OtherSegmentsAndIntersegmentsEliminationsMember_label_en-US\" xlink:label=\"lab_cpk_OtherSegmentsAndIntersegmentsEliminationsMember\" xlink:role=\"http://www.xbrl.org/2003/role/label\" xlink:type=\"resource\" xml:lang=\"en-US\">Other Segments And Intersegments Eliminations [Member]</link:label>\n    <link:label id=\"lab_cpk_OtherSegmentsAndIntersegmentsEliminationsMember_documentation_en-US\" xlink:label=\"lab_cpk_OtherSegmentsAndIntersegmentsEliminationsMember\" xlink:role=\"http://www.xbrl.org/2003/role/documentation\" xlink:type=\"resource\" xml:lang=\"en-US\">Other segments and intersegments eliminations.</link:label>\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments\" xlink:href=\"https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments\"/>\n    <link:labelArc xlink:arcrole=\"http://www.xbrl.org/2003/arcrole/concept-label\" xlink:from=\"loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments\" xlink:to=\"lab_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments\" xlink:type=\"arc\" order=\"1\"/>\n    <link:label id=\"lab_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_a175eb8d-a101-4db6-ab33-cf4b82af2b30_totalLabel_en-US\" xlink:label=\"lab_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments\" xlink:role=\"http://www.xbrl.org/2003/role/totalLabel\" xlink:type=\"resource\" xml:lang=\"en-US\">Income from Continuing Operations Before Income Taxes</link:label>\n    <link:label id=\"lab_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_176ecde5-f5bb-4579-91e8-16d3f505c90b_terseLabel_en-US\" xlink:label=\"lab_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments\" xlink:role=\"http://www.xbrl.org/2003/role/terseLabel\" xlink:type=\"resource\" xml:lang=\"en-US\">Income Before Income taxes</link:label>\n    <link:label id=\"lab_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_label_en-US\" xlink:label=\"lab_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments\" xlink:role=\"http://www.xbrl.org/2003/role/label\" xlink:type=\"resource\" xml:lang=\"en-US\">Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest</link:label>\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_us-gaap_SegmentReportingInformationLineItems\" xlink:href=\"https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SegmentReportingInformationLineItems\"/>\n    <link:labelArc xlink:arcrole=\"http://www.xbrl.org/2003/arcrole/concept-label\" xlink:from=\"loc_us-gaap_SegmentReportingInformationLineItems\" xlink:to=\"lab_us-gaap_SegmentReportingInformationLineItems\" xlink:type=\"arc\" order=\"1\"/>\n    <link:label id=\"lab_us-gaap_SegmentReportingInformationLineItems_da44928a-bba6-40c5-a91f-769e90a7826d_terseLabel_en-US\" xlink:label=\"lab_us-gaap_SegmentReportingInformationLineItems\" xlink:role=\"http://www.xbrl.org/2003/role/terseLabel\" xlink:type=\"resource\" xml:lang=\"en-US\">Segment Reporting Information [Line Items]</link:label>\n    <link:label id=\"lab_us-gaap_SegmentReportingInformationLineItems_label_en-US\" xlink:label=\"lab_us-gaap_SegmentReportingInformationLineItems\" xlink:role=\"http://www.xbrl.org/2003/role/label\" xlink:type=\"resource\" xml:lang=\"en-US\">Segment Reporting Information [Line Items]</link:label>\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_us-gaap_IncomeLossFromContinuingOperations\" xlink:href=\"https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncomeLossFromContinuingOperations\"/>\n    <link:labelArc xlink:arcrole=\"http://www.xbrl.org/2003/arcrole/concept-label\" xlink:from=\"loc_us-gaap_IncomeLossFromContinuingOperations\" xlink:to=\"lab_us-gaap_IncomeLossFromContinuingOperations\" xlink:type=\"arc\" order=\"1\"/>\n    <link:label id=\"lab_us-gaap_IncomeLossFromContinuingOperations_7836af39-bd11-458b-9b6a-439c897ccca5_totalLabel_en-US\" xlink:label=\"lab_us-gaap_IncomeLossFromContinuingOperations\" xlink:role=\"http://www.xbrl.org/2003/role/totalLabel\" xlink:type=\"resource\" xml:lang=\"en-US\">Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent</link:label>\n    <link:label id=\"lab_us-gaap_IncomeLossFromContinuingOperations_84d12955-4e43-4bdc-a420-529e2328569b_terseLabel_en-US\" xlink:label=\"lab_us-gaap_IncomeLossFromContinuingOperations\" xlink:role=\"http://www.xbrl.org/2003/role/terseLabel\" xlink:type=\"resource\" xml:lang=\"en-US\">Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent</link:label>\n    <link:label id=\"lab_us-gaap_IncomeLossFromContinuingOperations_label_en-US\" xlink:label=\"lab_us-gaap_IncomeLossFromContinuingOperations\" xlink:role=\"http://www.xbrl.org/2003/role/label\" xlink:type=\"resource\" xml:lang=\"en-US\">Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent</link:label>\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_us-gaap_RetainedEarningsMember\" xlink:href=\"https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RetainedEarningsMember\"/>\n    <link:labelArc xlink:arcrole=\"http://www.xbrl.org/2003/arcrole/concept-label\" xlink:from=\"loc_us-gaap_RetainedEarningsMember\" xlink:to=\"lab_us-gaap_RetainedEarningsMember\" xlink:type=\"arc\" order=\"1\"/>\n    <link:label id=\"lab_us-gaap_RetainedEarningsMember_183137a2-add5-4c05-9212-d845aa0202c8_terseLabel_en-US\" xlink:label=\"lab_us-gaap_RetainedEarningsMember\" xlink:role=\"http://www.xbrl.org/2003/role/terseLabel\" xlink:type=\"resource\" xml:lang=\"en-US\">Retained Earnings [Member]</link:label>\n    <link:label id=\"lab_us-gaap_RetainedEarningsMember_label_en-US\" xlink:label=\"lab_us-gaap_RetainedEarningsMember\" xlink:role=\"http://www.xbrl.org/2003/role/label\" xlink:type=\"resource\" xml:lang=\"en-US\">Retained Earnings [Member]</link:label>\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_us-gaap_OperatingSegmentsMember\" xlink:href=\"https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OperatingSegmentsMember\"/>\n    <link:labelArc xlink:arcrole=\"http://www.xbrl.org/2003/arcrole/concept-label\" xlink:from=\"loc_us-gaap_OperatingSegmentsMember\" xlink:to=\"lab_us-gaap_OperatingSegmentsMember\" xlink:type=\"arc\" order=\"1\"/>\n    <link:label id=\"lab_us-gaap_OperatingSegmentsMember_2a5efb5b-54f7-46a7-86b3-ea878a4a2ff3_terseLabel_en-US\" xlink:label=\"lab_us-gaap_OperatingSegmentsMember\" xlink:role=\"http://www.xbrl.org/2003/role/terseLabel\" xlink:type=\"resource\" xml:lang=\"en-US\">Operating Segments</link:label>\n    <link:label id=\"lab_us-gaap_OperatingSegmentsMember_label_en-US\" xlink:label=\"lab_us-gaap_OperatingSegmentsMember\" xlink:role=\"http://www.xbrl.org/2003/role/label\" xlink:type=\"resource\" xml:lang=\"en-US\">Operating Segments [Member]</link:label>\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_cpk_TotalforSegmentsMember\" xlink:href=\"cpk-20221231.xsd#cpk_TotalforSegmentsMember\"/>\n    <link:labelArc xlink:arcrole=\"http://www.xbrl.org/2003/arcrole/concept-label\" xlink:from=\"loc_cpk_TotalforSegmentsMember\" xlink:to=\"lab_cpk_TotalforSegmentsMember\" xlink:type=\"arc\" order=\"1\"/>\n    <link:label id=\"lab_cpk_TotalforSegmentsMember_5fef4052-ebde-492d-9a0b-1dba2de508b9_terseLabel_en-US\" xlink:label=\"lab_cpk_TotalforSegmentsMember\" xlink:role=\"http://www.xbrl.org/2003/role/terseLabel\" xlink:type=\"resource\" xml:lang=\"en-US\">Total for Segments [Member]</link:label>\n    <link:label id=\"lab_cpk_TotalforSegmentsMember_label_en-US\" xlink:label=\"lab_cpk_TotalforSegmentsMember\" xlink:role=\"http://www.xbrl.org/2003/role/label\" xlink:type=\"resource\" xml:lang=\"en-US\">Total for Segments [Member]</link:label>\n    <link:label id=\"lab_cpk_TotalforSegmentsMember_documentation_en-US\" xlink:label=\"lab_cpk_TotalforSegmentsMember\" xlink:role=\"http://www.xbrl.org/2003/role/documentation\" xlink:type=\"resource\" xml:lang=\"en-US\">Total for Segments [Member]</link:label>\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_us-gaap_BusinessAcquisitionAxis\" xlink:href=\"https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BusinessAcquisitionAxis\"/>\n    <link:labelArc xlink:arcrole=\"http://www.xbrl.org/2003/arcrole/concept-label\" xlink:from=\"loc_us-gaap_BusinessAcquisitionAxis\" xlink:to=\"lab_us-gaap_BusinessAcquisitionAxis\" xlink:type=\"arc\" order=\"1\"/>\n    <link:label id=\"lab_us-gaap_BusinessAcquisitionAxis_69f14fdd-e005-4897-8e27-e8e82ca6b3af_terseLabel_en-US\" xlink:label=\"lab_us-gaap_BusinessAcquisitionAxis\" xlink:role=\"http://www.xbrl.org/2003/role/terseLabel\" xlink:type=\"resource\" xml:lang=\"en-US\">Business Acquisition [Axis]</link:label>\n    <link:label id=\"lab_us-gaap_BusinessAcquisitionAxis_label_en-US\" xlink:label=\"lab_us-gaap_BusinessAcquisitionAxis\" xlink:role=\"http://www.xbrl.org/2003/role/label\" xlink:type=\"resource\" xml:lang=\"en-US\">Business Acquisition [Axis]</link:label>\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_cpk_AccumulatedGainLossFromInterestRateSwapCashFlowsHedgesMember\" xlink:href=\"cpk-20221231.xsd#cpk_AccumulatedGainLossFromInterestRateSwapCashFlowsHedgesMember\"/>\n    <link:labelArc xlink:arcrole=\"http://www.xbrl.org/2003/arcrole/concept-label\" xlink:from=\"loc_cpk_AccumulatedGainLossFromInterestRateSwapCashFlowsHedgesMember\" xlink:to=\"lab_cpk_AccumulatedGainLossFromInterestRateSwapCashFlowsHedgesMember\" xlink:type=\"arc\" order=\"1\"/>\n    <link:label id=\"lab_cpk_AccumulatedGainLossFromInterestRateSwapCashFlowsHedgesMember_a378c559-f3f1-4e2c-8b35-c4cc05fd2da9_terseLabel_en-US\" xlink:label=\"lab_cpk_AccumulatedGainLossFromInterestRateSwapCashFlowsHedgesMember\" xlink:role=\"http://www.xbrl.org/2003/role/terseLabel\" xlink:type=\"resource\" xml:lang=\"en-US\">Accumulated (Gain) Loss from Interest Rate Swap Cash Flows Hedges</link:label>\n    <link:label id=\"lab_cpk_AccumulatedGainLossFromInterestRateSwapCashFlowsHedgesMember_label_en-US\" xlink:label=\"lab_cpk_AccumulatedGainLossFromInterestRateSwapCashFlowsHedgesMember\" xlink:role=\"http://www.xbrl.org/2003/role/label\" xlink:type=\"resource\" xml:lang=\"en-US\">Accumulated (Gain) Loss from Interest Rate Swap Cash Flows Hedges [Member]</link:label>\n    <link:label id=\"lab_cpk_AccumulatedGainLossFromInterestRateSwapCashFlowsHedgesMember_documentation_en-US\" xlink:label=\"lab_cpk_AccumulatedGainLossFromInterestRateSwapCashFlowsHedgesMember\" xlink:role=\"http://www.xbrl.org/2003/role/documentation\" xlink:type=\"resource\" xml:lang=\"en-US\">Accumulated (Gain) Loss from Interest Rate Swap Cash Flows Hedges</link:label>\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_us-gaap_OtherNonoperatingIncomeExpense\" xlink:href=\"https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OtherNonoperatingIncomeExpense\"/>\n    <link:labelArc xlink:arcrole=\"http://www.xbrl.org/2003/arcrole/concept-label\" xlink:from=\"loc_us-gaap_OtherNonoperatingIncomeExpense\" xlink:to=\"lab_us-gaap_OtherNonoperatingIncomeExpense\" xlink:type=\"arc\" order=\"1\"/>\n    <link:label id=\"lab_us-gaap_OtherNonoperatingIncomeExpense_b551b60d-189e-46b0-bea3-c9124ed0caae_verboseLabel_en-US\" xlink:label=\"lab_us-gaap_OtherNonoperatingIncomeExpense\" xlink:role=\"http://www.xbrl.org/2003/role/verboseLabel\" xlink:type=\"resource\" xml:lang=\"en-US\">Other income, net</link:label>\n    <link:label id=\"lab_us-gaap_OtherNonoperatingIncomeExpense_014e0372-81c7-45cb-bb60-05c12bee7506_terseLabel_en-US\" xlink:label=\"lab_us-gaap_OtherNonoperatingIncomeExpense\" xlink:role=\"http://www.xbrl.org/2003/role/terseLabel\" xlink:type=\"resource\" xml:lang=\"en-US\">Other income</link:label>\n    <link:label id=\"lab_us-gaap_OtherNonoperatingIncomeExpense_label_en-US\" xlink:label=\"lab_us-gaap_OtherNonoperatingIncomeExpense\" xlink:role=\"http://www.xbrl.org/2003/role/label\" xlink:type=\"resource\" xml:lang=\"en-US\">Other Nonoperating Income (Expense)</link:label>\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_us-gaap_DepreciationDepletionAndAmortization\" xlink:href=\"https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DepreciationDepletionAndAmortization\"/>\n    <link:labelArc xlink:arcrole=\"http://www.xbrl.org/2003/arcrole/concept-label\" xlink:from=\"loc_us-gaap_DepreciationDepletionAndAmortization\" xlink:to=\"lab_us-gaap_DepreciationDepletionAndAmortization\" xlink:type=\"arc\" order=\"1\"/>\n    <link:label id=\"lab_us-gaap_DepreciationDepletionAndAmortization_4c0df82a-01ba-4f16-81f1-d6b8f21c9ba9_terseLabel_en-US\" xlink:label=\"lab_us-gaap_DepreciationDepletionAndAmortization\" xlink:role=\"http://www.xbrl.org/2003/role/terseLabel\" xlink:type=\"resource\" xml:lang=\"en-US\">Depreciation and amortization</link:label>\n    <link:label id=\"lab_us-gaap_DepreciationDepletionAndAmortization_e8b258c0-f4c1-4dd9-bee2-cc0393fce5fb_verboseLabel_en-US\" xlink:label=\"lab_us-gaap_DepreciationDepletionAndAmortization\" xlink:role=\"http://www.xbrl.org/2003/role/verboseLabel\" xlink:type=\"resource\" xml:lang=\"en-US\">Total depreciation and amortization</link:label>\n    <link:label id=\"lab_us-gaap_DepreciationDepletionAndAmortization_label_en-US\" xlink:label=\"lab_us-gaap_DepreciationDepletionAndAmortization\" xlink:role=\"http://www.xbrl.org/2003/role/label\" xlink:type=\"resource\" xml:lang=\"en-US\">Depreciation, Depletion and Amortization</link:label>\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_cpk_UnregulatedEnergyMember\" xlink:href=\"cpk-20221231.xsd#cpk_UnregulatedEnergyMember\"/>\n    <link:labelArc xlink:arcrole=\"http://www.xbrl.org/2003/arcrole/concept-label\" xlink:from=\"loc_cpk_UnregulatedEnergyMember\" xlink:to=\"lab_cpk_UnregulatedEnergyMember\" xlink:type=\"arc\" order=\"1\"/>\n    <link:label id=\"lab_cpk_UnregulatedEnergyMember_04d97adf-1871-4794-aaec-ba89a76be07c_terseLabel_en-US\" xlink:label=\"lab_cpk_UnregulatedEnergyMember\" xlink:role=\"http://www.xbrl.org/2003/role/terseLabel\" xlink:type=\"resource\" xml:lang=\"en-US\">Unregulated Energy</link:label>\n    <link:label id=\"lab_cpk_UnregulatedEnergyMember_label_en-US\" xlink:label=\"lab_cpk_UnregulatedEnergyMember\" xlink:role=\"http://www.xbrl.org/2003/role/label\" xlink:type=\"resource\" xml:lang=\"en-US\">Unregulated Energy [Member]</link:label>\n    <link:label id=\"lab_cpk_UnregulatedEnergyMember_documentation_en-US\" xlink:label=\"lab_cpk_UnregulatedEnergyMember\" xlink:role=\"http://www.xbrl.org/2003/role/documentation\" xlink:type=\"resource\" xml:lang=\"en-US\">Unregulated energy.</link:label>\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_us-gaap_Revenues\" xlink:href=\"https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_Revenues\"/>\n    <link:labelArc xlink:arcrole=\"http://www.xbrl.org/2003/arcrole/concept-label\" xlink:from=\"loc_us-gaap_Revenues\" xlink:to=\"lab_us-gaap_Revenues\" xlink:type=\"arc\" order=\"1\"/>\n    <link:label id=\"lab_us-gaap_Revenues_a2ea4048-a051-4037-9e6b-5a7b0a03f1da_totalLabel_en-US\" xlink:label=\"lab_us-gaap_Revenues\" xlink:role=\"http://www.xbrl.org/2003/role/totalLabel\" xlink:type=\"resource\" xml:lang=\"en-US\">Total operating revenues</link:label>\n    <link:label id=\"lab_us-gaap_Revenues_f4b9fba6-b1a6-4452-9a09-e26a6812742c_terseLabel_en-US\" xlink:label=\"lab_us-gaap_Revenues\" xlink:role=\"http://www.xbrl.org/2003/role/terseLabel\" xlink:type=\"resource\" xml:lang=\"en-US\">Revenues</link:label>\n    <link:label id=\"lab_us-gaap_Revenues_96e95d83-0ecd-4a12-8955-9af18c527674_verboseLabel_en-US\" xlink:label=\"lab_us-gaap_Revenues\" xlink:role=\"http://www.xbrl.org/2003/role/verboseLabel\" xlink:type=\"resource\" xml:lang=\"en-US\">Total intersegment revenues</link:label>\n    <link:label id=\"lab_us-gaap_Revenues_label_en-US\" xlink:label=\"lab_us-gaap_Revenues\" xlink:role=\"http://www.xbrl.org/2003/role/label\" xlink:type=\"resource\" xml:lang=\"en-US\">Revenues</link:label>\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_us-gaap_PaymentsToAcquireProductiveAssets\" xlink:href=\"https://xbrl.fasb.org/us-gaap/2022/e\n\n##Instance document\n<?xml version='1.0' encoding='UTF-8'?>\n<xbrl xmlns=\"http://www.xbrl.org/2003/instance\" xmlns:cpk=\"http://www.chpk.com/20221231\" xmlns:dei=\"http://xbrl.sec.gov/dei/2022\" xmlns:iso4217=\"http://www.xbrl.org/2003/iso4217\" xmlns:link=\"http://www.xbrl.org/2003/linkbase\" xmlns:srt=\"http://fasb.org/srt/2022\" xmlns:stpr=\"http://xbrl.sec.gov/stpr/2022\" xmlns:us-gaap=\"http://fasb.org/us-gaap/2022\" xmlns:utr=\"http://www.xbrl.org/2009/utr\" xmlns:xbrldi=\"http://xbrl.org/2006/xbrldi\" xmlns:xhtml=\"http://www.w3.org/1999/xhtml\" xmlns:xlink=\"http://www.w3.org/1999/xlink\" xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" xml:lang=\"en-US\"><link:schemaRef xlink:href=\"cpk-20221231.xsd\" xlink:type=\"simple\"/>\n\t<context id=\"if0abdb951df14ec8a25718fcc566aa49_D20220101-20221231\">\n        <entity>\n            <identifier scheme=\"http://www.sec.gov/CIK\">0000019745</identifier>\n        </entity>\n        <period>\n            <startDate>2022-01-01</startDate>\n            <endDate>2022-12-31</endDate>\n        </period>\n    </context>\n\t<context id=\"i7e80f7cffa944e08b2e03645eb4b71d9_D20210101-20211231\">\n        <entity>\n            <identifier scheme=\"http://www.sec.gov/CIK\">0000019745</identifier>\n        </entity>\n        <period>\n            <startDate>2021-01-01</startDate>\n            <endDate>2021-12-31</endDate>\n        </period>\n    </context>\n\t<context id=\"i8b67478240c1452a8ce6b85a5946ce94_D20200101-20201231\">\n        <entity>\n            <identifier scheme=\"http://www.sec.gov/CIK\">0000019745</identifier>\n        </entity>\n        <period>\n            <startDate>2020-01-01</startDate>\n            <endDate>2020-12-31</endDate>\n        </period>\n    </context>\n\t<context id=\"i534041f96dbe4c84af2ec973809f9974_D20220101-20221231\">\n        <entity>\n            <identifier scheme=\"http://www.sec.gov/CIK\">0000019745</identifier>\n            <segment>\n                <xbrldi:explicitMember dimension=\"us-gaap:BusinessAcquisitionAxis\">cpk:DiversifiedEnergyMember</xbrldi:explicitMember>\n                <xbrldi:explicitMember dimension=\"us-gaap:StatementBusinessSegmentsAxis\">cpk:UnregulatedEnergyMember</xbrldi:explicitMember>\n            </segment>\n        </entity>\n        <period>\n            <startDate>2022-01-01</startDate>\n            <endDate>2022-12-31</endDate>\n        </period>\n    </context>\n\t<context id=\"iffb86749c4224d9f8ac05e50d8d5aa8c_D20210101-20211231\">\n        <entity>\n            <identifier scheme=\"http://www.sec.gov/CIK\">0000019745</identifier>\n            <segment>\n                <xbrldi:explicitMember dimension=\"us-gaap:BusinessAcquisitionAxis\">cpk:DiversifiedEnergyMember</xbrldi:explicitMember>\n                <xbrldi:explicitMember dimension=\"us-gaap:StatementBusinessSegmentsAxis\">cpk:UnregulatedEnergyMember</xbrldi:explicitMember>\n            </segment>\n        </entity>\n        <period>\n            <startDate>2021-01-01</startDate>\n            <endDate>2021-12-31</endDate>\n        </period>\n    </context>\n\t<context id=\"i49d6d8fff3cd4a43b040940a8d0c51ea_D20220101-20221231\">\n        <entity>\n            <identifier scheme=\"http://www.sec.gov/CIK\">0000019745</identifier>\n            <segment>\n                <xbrldi:explicitMember dimension=\"us-gaap:StatementBusinessSegmentsAxis\">cpk:RegulatedEnergyMember</xbrldi:explicitMember>\n                <xbrldi:explicitMember dimension=\"dei:LegalEntityAxis\">cpk:OtherMember</xbrldi:explicitMember>\n            </segment>\n        </entity>\n        <period>\n            <startDate>2022-01-01</startDate>\n            <endDate>2022-12-31</endDate>\n        </period>\n    </context>\n\t<context id=\"i1a2a60e3504445b997f005e02fbaf751_D20220101-20221231\">\n        <entity>\n            <identifier scheme=\"http://www.sec.gov/CIK\">0000019745</identifier>\n            <segment>\n                <xbrldi:explicitMember dimension=\"us-gaap:StatementBusinessSegmentsAxis\">cpk:UnregulatedEnergyMember</xbrldi:explicitMember>\n                <xbrldi:explicitMember dimension=\"dei:LegalEntityAxis\">cpk:OtherMember</xbrldi:explicitMember>\n            </segment>\n        </entity>\n        <period>\n            <startDate>2022-01-01</startDate>\n            <endDate>2022-12-31</endDate>\n        </period>\n    </context>\n\t<context id=\"i4d040449242b4b4f83fd01c96e5b4905_D20210101-20211231\">\n        <entity>\n            <identifier scheme=\"http://www.sec.gov/CIK\">0000019745</identifier>\n            <segment>\n                <xbrldi:explicitMember 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<endDate>2021-12-31</endDate>\n        </period>\n    </context>\n\t<context id=\"i5884d933379942d593e49e113afb110a_D20200101-20201231\">\n        <entity>\n            <identifier scheme=\"http://www.sec.gov/CIK\">0000019745</identifier>\n            <segment>\n                <xbrldi:explicitMember dimension=\"us-gaap:StatementBusinessSegmentsAxis\">cpk:RegulatedEnergyMember</xbrldi:explicitMember>\n                <xbrldi:explicitMember dimension=\"dei:LegalEntityAxis\">cpk:OtherMember</xbrldi:explicitMember>\n            </segment>\n        </entity>\n        <period>\n            <startDate>2020-01-01</startDate>\n            <endDate>2020-12-31</endDate>\n        </period>\n    </context>\n\t<context id=\"i6f8ec09bec0949698b3944ab882c4e38_D20200101-20201231\">\n        <entity>\n            <identifier scheme=\"http://www.sec.gov/CIK\">0000019745</identifier>\n            <segment>\n                <xbrldi:explicitMember dimension=\"us-gaap:StatementBusinessSegmentsAxis\">cpk:UnregulatedEnergyMember</xbrldi:explicitMember>\n                <xbrldi:explicitMember dimension=\"dei:LegalEntityAxis\">cpk:OtherMember</xbrldi:explicitMember>\n            </segment>\n        </entity>\n        <period>\n            <startDate>2020-01-01</startDate>\n            <endDate>2020-12-31</endDate>\n        </period>\n    </context>\n\t<context id=\"i517f146daaee435989b62da31d3db903_D20220101-20221231\">\n        <entity>\n            <identifier scheme=\"http://www.sec.gov/CIK\">0000019745</identifier>\n            <segment>\n                <xbrldi:explicitMember dimension=\"srt:ConsolidationItemsAxis\">us-gaap:OperatingSegmentsMember</xbrldi:explicitMember>\n                <xbrldi:explicitMember dimension=\"us-gaap:StatementBusinessSegmentsAxis\">cpk:RegulatedEnergyMember</xbrldi:explicitMember>\n            </segment>\n        </entity>\n        <period>\n            <startDate>2022-01-01</startDate>\n            <endDate>2022-12-31</endDate>\n        </period>\n    </context>\n\t<context id=\"i7a445f81659743369b1016cc179db01a_D20210101-20211231\">\n        <entity>\n            <identifier scheme=\"http://www.sec.gov/CIK\">0000019745</identifier>\n            <segment>\n                <xbrldi:explicitMember dimension=\"srt:ConsolidationItemsAxis\">us-gaap:OperatingSegmentsMember</xbrldi:explicitMember>\n                <xbrldi:explicitMember dimension=\"us-gaap:StatementBusinessSegmentsAxis\">cpk:RegulatedEnergyMember</xbrldi:explicitMember>\n            </segment>\n        </entity>\n        <period>\n            <startDate>2021-01-01</startDate>\n            <endDate>2021-12-31</endDate>\n        </period>\n    </context>\n\t<context id=\"i3695e24a122044f5a27c2e6bf984c109_D20200101-20201231\">\n        <entity>\n            <identifier scheme=\"http://www.sec.gov/CIK\">0000019745</identifier>\n            <segment>\n                <xbrldi:explicitMember 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<startDate>2022-01-01</startDate>\n            <endDate>2022-12-31</endDate>\n        </period>\n    </context>\n\t<context id=\"i9c513a917cea4c57b1696c703098a477_D20210101-20211231\">\n        <entity>\n            <identifier scheme=\"http://www.sec.gov/CIK\">0000019745</identifier>\n            <segment>\n                <xbrldi:explicitMember dimension=\"srt:ConsolidationItemsAxis\">us-gaap:OperatingSegmentsMember</xbrldi:explicitMember>\n                <xbrldi:explicitMember dimension=\"us-gaap:StatementBusinessSegmentsAxis\">cpk:UnregulatedEnergyMember</xbrldi:explicitMember>\n            </segment>\n        </entity>\n        <period>\n            <startDate>2021-01-01</startDate>\n            <endDate>2021-12-31</endDate>\n        </period>\n    </context>\n\t<context id=\"i6cb5b325e9674a65af81ddd1b4ee3d86_D20200101-20201231\">\n        <entity>\n            <identifier scheme=\"http://www.sec.gov/CIK\">0000019745</identifier>\n            <segment>\n                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<startDate>2021-01-01</startDate>\n \n\n##US GAAP Taxonomy\nNone\n\nQuestion: What erroneous relationship type exists between StatementBusinessSegmentsAxis and UnregulatedOperationMember, based on the provided XBRL filing and the US GAAP taxonomy?\nAnswer:\n\n    "

Answer: "CombinationErr"