{ "bbox":null, "type":"Feature", "geometry":{ "bbox":null, "type":"Point", "coordinates":[ -98.13556, 36.74444 ] }, "properties":{ "provider":"SWT", "code":"GSAL", "slug":"gsal", "elevation":1100.5, "horizontal_datum":"WGS84", "vertical_datum":"NGVD29", "state":"OK", "kind":"PROJECT", "nearest_city":"Jet, OK", "public_name":"Great Salt Plains Lake", "location_code":3812051, "nsid":null, "aliases":{ "CWMS Legacy Naming":"GSAL", "CWMS Standard Naming":"GSAL", "NWS Handbook 5 ID":"GSPO2", "USGS Station Number":"07150000", "DCP Platform ID":"CE53A166", "NIDID":"OK10319" }, "timeseries":[ { "tsid":"GSAL.Stor.Inst.1Hour.0.Ccp-Rev", "label":"Flood Storage", "base_parameter":"Stor", "parameter":"Stor", "unit":"ac-ft", "unit_long_name":"Acre-feet", "latest_time":"2026-04-14T22:00:00Z", "latest_value":29322.4, "delta24h":null, "sort_order":11, "results":null }, { "tsid":"GSAL.Flow-Res Out.Inst.1Hour.0.Rev-Regi-Flowgroup", "label":"Outflow", "base_parameter":"Flow", "parameter":"Flow-Res Out", 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"sort_order":22, "results":null }, { "tsid":"GSAL.Stor.Inst.1Hour.0.Ccp-Rev", "label":"Conservation Storage", "base_parameter":"Stor", "parameter":"Stor", "unit":"ac-ft", "unit_long_name":"Acre-feet", "latest_time":"2026-04-14T22:00:00Z", "latest_value":29322.4, "delta24h":null, "sort_order":13, "results":null }, { "tsid":"GSAL.Elev.Inst.1Hour.0.Ccp-Rev", "label":"Elevation", "base_parameter":"Elev", "parameter":"Elev", "unit":"ft", "unit_long_name":"Feet", "latest_time":"2026-04-14T22:00:00Z", "latest_value":1125.28, "delta24h":null, "sort_order":1, "results":null } ], "name":"Great Salt Plains Lake", "hasResopsAverages":"true", "nidId":"OK10319", "nidid":"", "levels":[ { "slug":"elev.24-hr surveillance begins", "label":"24-hr Surveillance Begins", "parameter":"Elev", "base_parameter":"Elev", "tsid":"GSAL.Elev.Inst.0.24-hr Surveillance Begins", "latest_value":1132, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.auxiliary spillway crest", "label":"Auxiliary Spillway Crest", 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"base_parameter":"Stor", "tsid":"GSAL.Stor.Inst.0.Maximum Pool", "latest_value":992628, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.spillway crest", "label":"Spillway Crest", "parameter":"Stor", "base_parameter":"Stor", "tsid":"GSAL.Stor.Inst.0.Spillway Crest", "latest_value":26409, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of conservation", "label":"Top of Conservation", "parameter":"Stor", "base_parameter":"Stor", "tsid":"GSAL.Stor.Inst.0.Top of Conservation", "latest_value":26409, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of constant conservation", "label":"Top of Constant Conservation", "parameter":"Stor", "base_parameter":"Stor", "tsid":"GSAL.Stor.Inst.0.Top of Constant Conservation", "latest_value":26409, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of dam", "label":"Top of Dam", "parameter":"Stor", "base_parameter":"Stor", "tsid":"GSAL.Stor.Inst.0.Top of Dam", "latest_value":1716000, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of flood", "label":"Top of Flood", "parameter":"Stor", "base_parameter":"Stor", "tsid":"GSAL.Stor.Inst.0.Top of Flood", "latest_value":270175, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of inactive", "label":"Top of Inactive", "parameter":"Stor", "base_parameter":"Stor", "tsid":"GSAL.Stor.Inst.0.Top of Inactive", "latest_value":0, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of normal", "label":"Top of Normal", "parameter":"Stor", "base_parameter":"Stor", "tsid":"GSAL.Stor.Inst.0.Top of Normal", "latest_value":26409, "units":"ac-ft", "units_long_name":"Acre-feet" } ], "id":549929, "associatedStructuresCount":0, "conditionAssessDate":null, "conditionAssessDetail":null, "conditionAssessId":6, "damHeight":68, "damLength":6010, "distance":null, "drainageArea":3200, "eapId":1, "dsacAssignedDate":"2024-02-21T12:00:00.000Z", "eapMeetsGuidelinesId":1, "emergencyContactsUpdated":"2024-06-07T12:00:00.000Z", "eapLastRevDate":"2024-06-07T12:00:00.000Z", "enforcementAuthorityId":0, "federalId":"OK10319", "oldFederalId":"OK10319", "hazardId":4, "hydraulicHeight":56, "inspectionAuthorityId":0, "inspectionDate":"2023-05-01T12:00:00.000Z", "inspectionFrequency":5, "jurisdictionAuthorityId":0, "latitude":36.7483448990001, "lengthOfLocks":0, "secondaryLengthOfLocks":null, "longitude":-98.138949055, "maxDischarge":101800, "maxStorage":990200, "nidHeight":68, "nidStorage":990200, "normalStorage":31420, "numberOfLocks":0, "operationalStatusDate":"2009-09-03T12:00:00.000Z", "operationalStatusId":1, "originalDesignerName":null, "otherStructureId":null, "permittingAuthorityId":0, "politicalPartyId":null, "privateDamId":null, "projectDescription":"The United States Army Corps of Engineers completed construction of Great Salt Plains Dam in 1941 with the primary purpose to reduce flooding in downstream communities. The dam consists of an earthen embankment and a concrete spillway. The project is located on the Salt Fork of the Arkansas River about 3 miles southeast of Vining. OK in Alfalfa County. During large storm events, the dam holds back excess water to reduce flooding downstream for communities along the Salt Fork and Arkansas Rivers. This stored water can then be released in a more controlled manner to reduce dangerous flooding. these releases are regulated by four ungated conduits within a concrete spillway. For larger floods, releases are made over an ungated spillway.", "riskCharSummary":"USACE completed a risk assessment in April 2023 and classified the risk associated with Great Salt Plains Dam as very low. This classification is based both on the remote potential for dam breach and the populations living downstream of the dam that would be flooded if breach were to occur. Although extremely unlikely, the primary risk to the integrity of the dam is water seeping through the foundation leading to breach of the dam. Failure of the dam would include flooding downstream, economic impacts, and potential loss of life. In the remote event of a dam failure the largest impacts would be to the cities of Nash, Jefferson, Pond Creek, Lamont, Tonkawa, and other communities along the Salt Fork of Arkansas River. There is also flood risk associated with the dam due to normal operation of the dam which could include large releases through the ungated spillway during a large flood.", "riskManagementMeasures":"There are numerous activities that USACE conducts on a day to day basis to help manage the risk that is posed to downstream communities. This includes conducting emergency exercises with local and state emergency responders to enhance evacuation planning, yearly updates to the EAP to improve emergency response actions, and development of a detailed communication plan for the dam. The dam is well maintained through continuous operations and maintenance activities, and USACE conducts detailed inspections of the dam during both normal lake levels and during flood events to ensure the integrity of the structure. Lastly, the dam has a robust instrumentation and monitoring program to allow USACE staff to evaluate the dam for changing conditions. These instruments are monitored regularly for any early indications of potential safety concerns at the project.", "riverName":"SALT FORK OF ARKANSAS RIVER", "separateStructuresCount":0, "sourceAgency":"US Army Corps of Engineers", "spillwayTypeId":3, "spillwayWidth":310, "stateFedId":"OK10319", "stateRegulatoryAgency":null, "stateRegulatedId":0, "structuralHeight":68, "submitDate":"2023-02-16T00:00:00.000Z", "surfaceArea":8690, "volume":2026000, "widthOfLocks":0, "secondaryWidthOfLocks":null, "yearCompleted":1941, "congDist":"Congressional District 03, Oklahoma", "city":"POND CREEK", "county":"Alfalfa", "aiannh":null, "websiteUrl":"https://www.swt.usace.army.mil/Locations/Tulsa-District-Lakes/Oklahoma/Great-Salt-Plains-Lake/", "coreTypeIds":"3", "damTypeIds":"8", "fedConstructionIds":"1", "fedDesignIds":"1", "fedFundingIds":"1", "fedInspectionIds":"1", "fedOperationIds":"1", "fedOtherIds":"1", "fedOwnerIds":"1", "fedRegulatoryIds":"1", "formerNames":null, "foundationTypeIds":"1;3", "nonFederalDamOnFederalId":0, "designerNames":"CESWT", "otherNames":"Great Salt Plains Lake", "ownerNames":"USACE - Tulsa District", "ownerTypeIds":"3", "primaryDamTypeId":8, "primaryOwnerTypeId":3, "primaryPurposeId":9, "purposeIds":"9;12", "dsacId":5, "femaRegion":"6", "lastEapExcerDate":"2024-06-11T12:00:00.000Z", "dataUpdated":"2025-07-02T12:00:00.000Z", "usaceDistrict":"Tulsa District", "noConsequencesId":0, "secretaryAgricultureBuiltId":null, "nrcsWatershedAuthorizationId":null, "isAssociatedStructureId":"No", "fedRegulatedId":"Yes", "inundationNidAddedId":1, "damStatusId":2, "huc06":"110600", "doi_region":"ART", "doi_region_name":"Arkansas-Rio Grande-Texas Gulf", "doi_region_number":6, "thirtyYearAverage":44.9464, "tenthPercentile":32.6078, "ninetiethPercentile":53.8189 }, "id":3812051, "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/3812051?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/3812051?f=jsonld" }, { "rel":"alternate", "type":"text/html", "title":"This document as HTML", "href":"https://api.wwdh.internetofwater.app/collections/usace-edr/items/3812051?f=html" }, { "rel":"collection", "type":"application/json", "title":"USACE Access2Water API", "href":"https://api.wwdh.internetofwater.app/collections/usace-edr" } ] }