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"base_parameter":"Stor", "tsid":"CEHT1.Stor.Inst.0.Top of Inactive", "latest_value":838000, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of induced surcharge", "label":"Top of Induced Surcharge", "parameter":"Stor", "base_parameter":"Stor", "tsid":"CEHT1.Stor.Inst.0.Top of Induced Surcharge", "latest_value":2115000, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of power", "label":"Top of Power", "parameter":"Stor", "base_parameter":"Stor", "tsid":"CEHT1.Stor.Inst.0.Top of Power", "latest_value":1330000, "units":"ac-ft", "units_long_name":"Acre-feet" } ], "id":550010, "associatedStructuresCount":0, "conditionAssessDate":null, "conditionAssessDetail":null, "conditionAssessId":6, "damHeight":null, "damLength":2160, "distance":5, "drainageArea":2174, "eapId":1, "dsacAssignedDate":"2018-01-23T12:00:00.000Z", "eapMeetsGuidelinesId":1, "emergencyContactsUpdated":"2024-07-11T12:00:00.000Z", "eapLastRevDate":"2023-01-13T12:00:00.000Z", "enforcementAuthorityId":0, "federalId":"TN04102", "oldFederalId":"TN04102", "hazardId":4, "hydraulicHeight":125, "inspectionAuthorityId":0, "inspectionDate":"2021-03-31T12:00:00.000Z", "inspectionFrequency":5, "jurisdictionAuthorityId":0, "latitude":36.0979037540001, "lengthOfLocks":0, "secondaryLengthOfLocks":null, "longitude":-85.82636891, "maxDischarge":454000, "maxStorage":2092000, "nidHeight":125, "nidStorage":2092000, "normalStorage":1330000, "numberOfLocks":0, "operationalStatusDate":"2018-01-23T12:00:00.000Z", "operationalStatusId":3, "originalDesignerName":null, "otherStructureId":null, "permittingAuthorityId":0, "politicalPartyId":null, "privateDamId":null, "projectDescription":"The U.S. Army Corps of Engineers (USACE) completed construction of the Center Hill Dam for Flood Control in 1948. The dam is located near Smithville, TN and impounds the Caney Fork River, a major tributary of the Cumberland River. The project was authorized by the 1938 Flood Control Act as part of an overall plan for the Ohio River Basin and is managed by the Nashville District, USACE. Center Hill Dam plays a major role in flood risk management of the Cumberland River providing protection to Gordonsville, Carthage, and Nashville. The dam has a maximum height of 226 feet, a total length of 2,160 feet, and consists of a concrete gravity section, earthen embankment, saddle dike topped with a fuse plug and powerhouse. The dam routinely stores and releases water through its eight spillway gates, three hydropower turbines, and six low level sluice gates. The spillway gates play a major role in water release during significant storm events. Center Hill Dam impounds Center Hill Lake which has a total storage capacity of 2,100,000 acre-ft. In addition to its originally authorized purposes of flood control and hydropower, Center Hill Dam and Lake Cumberland provide recreation, water supply, and water quality benefits for the basin and region.", "riskCharSummary":"USACE completed a major investment in Center Hill Dam to ensure the project operates safely, including completion of a foundation grouting program, full length concrete barrier wall through the earthen embankment into the bedrock below, and construction of a roller compacted concrete stability berm downstream of the saddle dike. Following this work, the dam was assessed in 2019 for any additional concerns and the risk associated with a dam breach after remediation was rated moderate. The project risk is currently driven by the consequences of an overtopping failure of the structure as a result of Tainter gate power supply issues causing increased flows and possible flooding downstream. Consequences from a dam failure are expected to be high with major damage centers at Gordonsville, Carthage, Hendersonville, and Nashville. The population at risk is estimated to be over 65,000. Additional evaluation of the Tainter gates at Center Hill indicate there is insufficient structural capacity to operate at design loads. Operation of the Tainter gates in certain loading conditions could cause failure of a gate or gates, leading to increased flows and inundation of structures downstream. There are currently no operating restrictions in place and no plans to change how water releases are managed.", "riskManagementMeasures":"USACE is continually taking significant steps to reduce the risk to the public. This includes working closely with local emergency managers, regularly updating the Emergency Action Plan, and conducting emergency exercises with state and local response teams. All dam safety staff are regularly trained to monitor and evaluate the condition of the dam based on key risk components. USACE regularly inspects the dam and monitors instruments to check the health of the dam with increased inspection and monitoring frequencies when action levels established by the PDT are exceeded. This ensures that the structure is performing as designed and could help detect any areas of potential concern. Regular maintenance and repairs are performed as needed to keep the dam functioning properly. Currently, USACE is aggressively pursuing the replacement of all eight spillway gates in order to restore full gate operability and keep the dam operating as designed.", "riverName":"CANEY FORK RIVER", "separateStructuresCount":0, "sourceAgency":"US Army Corps of Engineers", "spillwayTypeId":1, "spillwayWidth":775, "stateFedId":"TN04102", "stateRegulatoryAgency":null, "stateRegulatedId":0, "structuralHeight":125, "submitDate":"2023-02-16T17:25:14.084Z", "surfaceArea":18220, "volume":3578000, "widthOfLocks":0, "secondaryWidthOfLocks":null, "yearCompleted":1951, "congDist":"Congressional District 06, Tennessee", "city":"LANCASTER", "county":"DeKalb", "aiannh":null, "websiteUrl":"https://www.usace.army.mil/Missions/Civil-Works/Dam-Safety-Program/Article/2870967/dam-safety-program/", "coreTypeIds":"3", "damTypeIds":"12", "fedConstructionIds":"1", "fedDesignIds":"1", "fedFundingIds":"1", "fedInspectionIds":"1", "fedOperationIds":"1", "fedOtherIds":"1", "fedOwnerIds":"1", "fedRegulatoryIds":"1", "formerNames":null, "foundationTypeIds":"1", "nonFederalDamOnFederalId":0, "designerNames":"CELRN", "otherNames":"Center Hill Lake", "ownerNames":"USACE - Nashville District", "ownerTypeIds":"3", "primaryDamTypeId":12, "primaryOwnerTypeId":3, "primaryPurposeId":9, "purposeIds":"9;12;5;6;8", "dsacId":3, "femaRegion":"4", "lastEapExcerDate":"2024-07-11T12:00:00.000Z", "dataUpdated":"2025-04-22T12:00:00.000Z", "usaceDistrict":"Nashville District", "noConsequencesId":0, "secretaryAgricultureBuiltId":null, "nrcsWatershedAuthorizationId":null, "isAssociatedStructureId":"No", "fedRegulatedId":"Yes", "inundationNidAddedId":1, "damStatusId":2, "huc06":"051301", "doi_region":null, "doi_region_name":"South Atlantic Gulf", "doi_region_number":2, "thirtyYearAverage":239.411, "tenthPercentile":1.2786, "ninetiethPercentile":1469.2628 }, "id":2915010, "links":[ { "type":"application/json", "rel":"root", "title":"The landing page of this server as JSON", "href":"https://api.wwdh.internetofwater.app?f=json" }, { "type":"text/html", "rel":"root", "title":"The landing page of this server as HTML", "href":"https://api.wwdh.internetofwater.app?f=html" }, { "rel":"self", "type":"application/geo+json", "title":"This document as JSON", "href":"https://api.wwdh.internetofwater.app/collections/usace-edr/items/2915010?f=json" }, { "rel":"alternate", "type":"application/ld+json", "title":"This document as RDF (JSON-LD)", "href":"https://api.wwdh.internetofwater.app/collections/usace-edr/items/2915010?f=jsonld" }, { "rel":"alternate", "type":"text/html", "title":"This document as HTML", "href":"https://api.wwdh.internetofwater.app/collections/usace-edr/items/2915010?f=html" }, { "rel":"collection", "type":"application/json", "title":"USACE Access2Water API", "href":"https://api.wwdh.internetofwater.app/collections/usace-edr" } ] }