{ "bbox":null, "type":"Feature", "geometry":{ "bbox":null, "type":"Point", "coordinates":[ -86.61863, 36.15672 ] }, "properties":{ "provider":"LRN", "code":"JPHT1", "slug":"jpht1", "elevation":null, "horizontal_datum":"NAD83", "vertical_datum":"NGVD29", "state":"TN", "kind":"PROJECT", "nearest_city":"Donelson", "public_name":"J Percy Priest Dam", "location_code":2362010, "nsid":null, "aliases":{ "NID Dam Name":"J Percy Priest", "USACE":"JPP", "CWMS Standard Naming":"JPHT1", "CWMS Legacy Naming":"JPHT1", "NWS Handbook 5 ID":"JPHT1", "NIDID":"TN03701" }, "timeseries":[ { "tsid":"JPHT1-J_PERCY_PRIEST.%-Flood Control-Used.Inst.1Hour.0.CCP-Computed-Rev", "label":"Percent Flood Pool", "base_parameter":"%", "parameter":"%-Flood Control-Used", "unit":"%", "unit_long_name":"Percent", "latest_time":"2026-04-14T23:00:00Z", "latest_value":0.0, "delta24h":null, "sort_order":12, "results":null }, { "tsid":"JPHT1-J_PERCY_PRIEST.Elev-Pool.Inst.1Hour.0.man-rev", "label":"Elevation", "base_parameter":"Elev", "parameter":"Elev-Pool", "unit":"ft", "unit_long_name":"Feet", "latest_time":"2026-04-14T23:00:00Z", "latest_value":485.71, "delta24h":null, "sort_order":1, "results":null }, { "tsid":"JPHT1-J_PERCY_PRIEST.Elev-Tail.Inst.1Hour.0.man-rev", "label":"Elevation Tailwater", "base_parameter":"Elev", "parameter":"Elev-Tail", "unit":"ft", "unit_long_name":"Feet", "latest_time":"2026-04-14T23:00:00Z", "latest_value":386.91, "delta24h":null, "sort_order":3, "results":null }, { "tsid":"JPHT1-J_PERCY_PRIEST.Flow.Ave.1Hour.1Hour.man-rev", "label":"Outflow", "base_parameter":"Flow", "parameter":"Flow", "unit":"cfs", "unit_long_name":"Cubic feet per second", "latest_time":"2026-04-14T23:00:00Z", "latest_value":0.0, "delta24h":null, "sort_order":7, "results":null }, { "tsid":"JPHT1-J_PERCY_PRIEST.Stor.Inst.1Hour.0.man-rev", "label":"Flood Storage", "base_parameter":"Stor", "parameter":"Stor", "unit":"ac-ft", "unit_long_name":"Acre-feet", "latest_time":"2026-04-14T23:00:00Z", "latest_value":334796.15, "delta24h":null, "sort_order":11, "results":null }, { "tsid":"JPHT1-J_PERCY_PRIEST.Flow-In.Ave.1Hour.1Hour.man-rev", "label":"Inflow", "base_parameter":"Flow", "parameter":"Flow-In", "unit":"cfs", "unit_long_name":"Cubic feet per second", "latest_time":"2026-04-14T23:00:00Z", "latest_value":1511.99, "delta24h":null, "sort_order":6, "results":null } ], "name":"J Percy Priest Dam", "hasResopsAverages":"true", "nidId":"TN03701", "nidid":"", "levels":[ { "slug":"elev.bottom of flood", "label":"Bottom of Flood", "parameter":"Elev", "base_parameter":"Elev", "tsid":"JPHT1.Elev.Inst.0.Bottom of Flood", "latest_value":488.73, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.bottom of power", "label":"Bottom of Power", "parameter":"Elev", "base_parameter":"Elev", "tsid":"JPHT1.Elev.Inst.0.Bottom of Power", "latest_value":486.37, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.spillway crest", "label":"Spillway Crest", "parameter":"Elev", "base_parameter":"Elev", "tsid":"JPHT1.Elev.Inst.0.Spillway Crest", "latest_value":463.5, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.streambed", "label":"Streambed", "parameter":"Elev", "base_parameter":"Elev", "tsid":"JPHT1.Elev.Inst.0.Streambed", "latest_value":387.01, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of dam", "label":"Top of Dam", "parameter":"Elev", "base_parameter":"Elev", "tsid":"JPHT1.Elev.Inst.0.Top of Dam", "latest_value":518, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of flood", "label":"Top of Flood", "parameter":"Elev", "base_parameter":"Elev", "tsid":"JPHT1.Elev.Inst.0.Top of Flood", "latest_value":504.5, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of inactive", "label":"Top of Inactive", "parameter":"Elev", "base_parameter":"Elev", "tsid":"JPHT1.Elev.Inst.0.Top of Inactive", "latest_value":480, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of power", "label":"Top of Power", "parameter":"Elev", "base_parameter":"Elev", "tsid":"JPHT1.Elev.Inst.0.Top of Power", "latest_value":488.21, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of recreation", "label":"Top of Recreation", "parameter":"Elev", "base_parameter":"Elev", "tsid":"JPHT1.Elev.Inst.0.Top of Recreation", "latest_value":486.56, "units":"ft", "units_long_name":"Feet" }, { "slug":"stor.bottom of flood", "label":"Bottom of Flood", "parameter":"Stor", "base_parameter":"Stor", "tsid":"JPHT1.Stor.Inst.0.Bottom of Flood", "latest_value":376161.32, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.bottom of power", "label":"Bottom of Power", "parameter":"Stor", "base_parameter":"Stor", "tsid":"JPHT1.Stor.Inst.0.Bottom of Power", "latest_value":344167.46, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.spillway crest", "label":"Spillway Crest", "parameter":"Stor", "base_parameter":"Stor", "tsid":"JPHT1.Stor.Inst.0.Spillway Crest", "latest_value":132000, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of dam", "label":"Top of Dam", "parameter":"Stor", "base_parameter":"Stor", "tsid":"JPHT1.Stor.Inst.0.Top of Dam", "latest_value":1038000, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of flood", "label":"Top of Flood", "parameter":"Stor", "base_parameter":"Stor", "tsid":"JPHT1.Stor.Inst.0.Top of Flood", "latest_value":651500, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of inactive", "label":"Top of Inactive", "parameter":"Stor", "base_parameter":"Stor", "tsid":"JPHT1.Stor.Inst.0.Top of Inactive", "latest_value":268000, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of power", "label":"Top of Power", "parameter":"Stor", "base_parameter":"Stor", "tsid":"JPHT1.Stor.Inst.0.Top of Power", "latest_value":369378.41, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of recreation", "label":"Top of Recreation", "parameter":"Stor", "base_parameter":"Stor", "tsid":"JPHT1.Stor.Inst.0.Top of Recreation", "latest_value":347487.46, "units":"ac-ft", "units_long_name":"Acre-feet" } ], "id":550008, "associatedStructuresCount":0, "conditionAssessDate":null, "conditionAssessDetail":null, "conditionAssessId":6, "damHeight":null, "damLength":2716, "distance":null, "drainageArea":892, "eapId":1, "dsacAssignedDate":"2023-03-31T12:00:00.000Z", "eapMeetsGuidelinesId":1, "emergencyContactsUpdated":"2024-06-25T12:00:00.000Z", "eapLastRevDate":"2023-01-13T12:00:00.000Z", "enforcementAuthorityId":0, "federalId":"TN03701", "oldFederalId":"TN03701", "hazardId":4, "hydraulicHeight":130, "inspectionAuthorityId":0, "inspectionDate":"2022-06-16T12:00:00.000Z", "inspectionFrequency":5, "jurisdictionAuthorityId":0, "latitude":36.15631282, "lengthOfLocks":0, "secondaryLengthOfLocks":null, "longitude":-86.6187906659999, "maxDischarge":263000, "maxStorage":652000, "nidHeight":147, "nidStorage":652000, "normalStorage":202000, "numberOfLocks":0, "operationalStatusDate":"2023-03-31T12:00:00.000Z", "operationalStatusId":1, "originalDesignerName":null, "otherStructureId":null, "permittingAuthorityId":0, "politicalPartyId":null, "privateDamId":null, "projectDescription":"The U.S. Army Corps of Engineers (USACE) began construction of the J Percy Priest Dam in 1963. Construction was completed in 1968. The project was authorized under the Flood Control Act of 1938 under the name of Stewarts Ferry Reservoir with additional authorization for power development and flood control by the River and Harbor Act of 1946. The name was later changed to J Percy Priest Dam in 1952 through Public Law 85-496. The J. Percy Priest Dam and Lake are located in Davidson/Wilson/Rutherford Counties in Tennessee. The dam is located 6.8 miles above the confluence with the Cumberland River, and approximately 23 river miles above the capital city of Nashville and controls a drainage area of 892 square miles. The lake is approximately 42 miles long and has a surface area of 14,200 acres during summer pool. The dam is a combination rolled earth fill and concrete gravity dam whose maximum height above streambed is 130 feet. The total crest length of the dam is approximately 2,716 feet, 664 feet of which is attributed to the concrete portion. The authorized purposes of the J. Percy Priest project are flood control, hydropower, and recreation, with additional operating purposes of fish and wildlife, water quality, and water supply.", "riskCharSummary":"Dams do not eliminate all risk of flooding. USACE works to address all types of flood risk associated with the dam. Dams have limited capacity to store water. Water may be released through the dam to manage water levels up or downstream or to relieve pressure on the dam to maintain its structural integrity. Severe weather events that bring inconsistent or larger amounts of water into the system can also lead to dam releases or in some cases overwhelm and lead to issues occurring at a dam. More detail related to this specific dam will be added at a future time.", "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 and monitors instruments to check the health of the dam and increase this monitoring during lake levels rises. 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.", "riverName":"STONES RIVER", "separateStructuresCount":0, "sourceAgency":"US Army Corps of Engineers", "spillwayTypeId":1, "spillwayWidth":180, "stateFedId":"TN03701", "stateRegulatoryAgency":null, "stateRegulatedId":0, "structuralHeight":147, "submitDate":"2023-02-16T17:25:28.846Z", "surfaceArea":14200, "volume":1823800, "widthOfLocks":0, "secondaryWidthOfLocks":null, "yearCompleted":1967, "congDist":"Congressional District 05, Tennessee", "city":"NASHVILLE", "county":"Davidson", "aiannh":null, "websiteUrl":"https://www.usace.army.mil/Missions/Civil-Works/Dam-Safety-Program/Article/2870967/dam-safety-program/", "coreTypeIds":"3", "damTypeIds":"11;8;9", "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":"J Percy Priest Lake", "ownerNames":"USACE - Nashville District", "ownerTypeIds":"3", "primaryDamTypeId":11, "primaryOwnerTypeId":3, "primaryPurposeId":9, "purposeIds":"9;12;5;6;8", "dsacId":4, "femaRegion":"4", "lastEapExcerDate":"2019-02-25T12:00:00.000Z", "dataUpdated":"2025-01-27T12:00:00.000Z", "usaceDistrict":"Nashville District", "noConsequencesId":0, "secretaryAgricultureBuiltId":null, "nrcsWatershedAuthorizationId":null, "isAssociatedStructureId":"No", "fedRegulatedId":"Yes", "inundationNidAddedId":1, "damStatusId":2, "huc06":"051302", "doi_region":null, "doi_region_name":"South Atlantic Gulf", "doi_region_number":2, "thirtyYearAverage":476.4626, "tenthPercentile":430.1365, "ninetiethPercentile":507.1324 }, "id":2362010, "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/2362010?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/2362010?f=jsonld" }, { "rel":"alternate", "type":"text/html", "title":"This document as HTML", "href":"https://api.wwdh.internetofwater.app/collections/usace-edr/items/2362010?f=html" }, { "rel":"collection", "type":"application/json", "title":"USACE Access2Water API", "href":"https://api.wwdh.internetofwater.app/collections/usace-edr" } ] }