{ "bbox":null, "type":"Feature", "geometry":{ "bbox":null, "type":"Point", "coordinates":[ -94.71944, 34.93611 ] }, "properties":{ "provider":"SWT", "code":"WIST", "slug":"wist", "elevation":0.0, "horizontal_datum":"WGS84", "vertical_datum":"NGVD29", "state":"OK", "kind":"PROJECT", "nearest_city":"Wister, OK", "public_name":"Wister Lake", "location_code":3473051, "nsid":null, "aliases":{ "NIDID":"OK10315", "CWMS Standard Naming":"WIST", "CWMS Legacy Naming":"WIST", "USGS Station Number":"07248000", "DCP Platform ID":"CE61A2E2", "NWS Handbook 5 ID":"WSLO2" }, "timeseries":[ { "tsid":"WIST.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":478.14, "delta24h":null, "sort_order":1, "results":null }, { "tsid":"WIST.Flow-Res Out.Inst.1Hour.0.Rev-Regi-Flowgroup", "label":"Outflow", "base_parameter":"Flow", "parameter":"Flow-Res Out", "unit":"cfs", "unit_long_name":"Cubic feet per second", "latest_time":"2026-04-14T22:00:00Z", "latest_value":326.13, "delta24h":null, "sort_order":7, "results":null }, { "tsid":"WIST.Precip-Inc.Total.1Hour.1Hour.Ccp-Rev", "label":"Precipitation", "base_parameter":"Precip", "parameter":"Precip-Inc", "unit":"in", "unit_long_name":"Inches", "latest_time":"2026-04-14T22:00:00Z", "latest_value":0.0, "delta24h":null, "sort_order":16, "results":null }, { "tsid":"WIST.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":51884.5, "delta24h":null, "sort_order":13, "results":null }, { "tsid":"WIST.Temp-Air.Inst.1Hour.0.Ccp-Rev", "label":"Air Temperature", "base_parameter":"Temp", "parameter":"Temp-Air", "unit":"F", "unit_long_name":"Fahrenheit", "latest_time":"2026-04-14T22:00:00Z", "latest_value":79.2, "delta24h":null, "sort_order":22, "results":null }, { "tsid":"WIST.Flow-Res In.Ave.~8Hours.8Hours.Rev-Ccp", "label":"Inflow", "base_parameter":"Flow", "parameter":"Flow-Res In", "unit":"cfs", "unit_long_name":"Cubic feet per second", "latest_time":"2026-04-14T13:00:00Z", "latest_value":0.0, "delta24h":null, "sort_order":6, "results":null }, { "tsid":"WIST.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":51884.5, "delta24h":null, "sort_order":11, "results":null }, { "tsid":"WIST.Elev-Tailwater.Inst.1Hour.0.Ccp-Rev", "label":"Elevation Tailwater", "base_parameter":"Elev", "parameter":"Elev-Tailwater", "unit":"ft", "unit_long_name":"Feet", "latest_time":"2026-04-14T22:00:00Z", "latest_value":402.32, "delta24h":null, "sort_order":3, "results":null } ], "name":"Wister Lake", "hasResopsAverages":"true", "nidId":"OK10315", "nidid":"", "levels":[ { "slug":"elev.24-hr surveillance begins", "label":"24-hr Surveillance Begins", "parameter":"Elev", "base_parameter":"Elev", "tsid":"WIST.Elev.Inst.0.24-hr Surveillance Begins", "latest_value":500, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.bottom of conservation", "label":"Bottom of Conservation", "parameter":"Elev", "base_parameter":"Elev", "tsid":"WIST.Elev.Inst.0.Bottom of Conservation", "latest_value":450, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.bottom of flood control", "label":"Bottom of Flood Control", "parameter":"Elev", "base_parameter":"Elev", "tsid":"WIST.Elev.Inst.0.Bottom of Flood Control", "latest_value":478, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.bottom of normal", "label":"Bottom of Normal", "parameter":"Elev", "base_parameter":"Elev", "tsid":"WIST.Elev.Inst.0.Bottom of Normal", "latest_value":450, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.daily surveillance level", "label":"Daily Surveillance Level", "parameter":"Elev", "base_parameter":"Elev", 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"units_long_name":"Feet" }, { "slug":"elev.top of normal", "label":"Top of Normal", "parameter":"Elev", "base_parameter":"Elev", "tsid":"WIST.Elev.Inst.0.Top of Normal", "latest_value":478, "units":"ft", "units_long_name":"Feet" }, { "slug":"stor.24-hr surveillance begins", "label":"24-hr Surveillance Begins", "parameter":"Stor", "base_parameter":"Stor", "tsid":"WIST.Stor.Inst.0.24-hr Surveillance Begins", "latest_value":330750, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.bottom of flood control", "label":"Bottom of Flood Control", "parameter":"Stor", "base_parameter":"Stor", "tsid":"WIST.Stor.Inst.0.Bottom of Flood Control", "latest_value":49433, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.bottom of normal", "label":"Bottom of Normal", "parameter":"Stor", "base_parameter":"Stor", "tsid":"WIST.Stor.Inst.0.Bottom of Normal", "latest_value":242, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.maximum pool", "label":"Maximum Pool", "parameter":"Stor", "base_parameter":"Stor", "tsid":"WIST.Stor.Inst.0.Maximum Pool", "latest_value":958200, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.spillway crest", "label":"Spillway Crest", "parameter":"Stor", "base_parameter":"Stor", "tsid":"WIST.Stor.Inst.0.Spillway Crest", "latest_value":383305, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of conservation", "label":"Top of Conservation", "parameter":"Stor", "base_parameter":"Stor", "tsid":"WIST.Stor.Inst.0.Top of Conservation", "latest_value":50902, "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":"WIST.Stor.Inst.0.Top of Constant Conservation", "latest_value":49433, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of dam", "label":"Top of Dam", "parameter":"Stor", "base_parameter":"Stor", "tsid":"WIST.Stor.Inst.0.Top of Dam", "latest_value":1204549, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of flood", "label":"Top of Flood", "parameter":"Stor", "base_parameter":"Stor", "tsid":"WIST.Stor.Inst.0.Top of Flood", "latest_value":390215, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of inactive", "label":"Top of Inactive", "parameter":"Stor", "base_parameter":"Stor", "tsid":"WIST.Stor.Inst.0.Top of Inactive", "latest_value":165, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of normal", "label":"Top of Normal", "parameter":"Stor", "base_parameter":"Stor", "tsid":"WIST.Stor.Inst.0.Top of Normal", "latest_value":49433, "units":"ac-ft", "units_long_name":"Acre-feet" } ], "id":550104, "associatedStructuresCount":0, "conditionAssessDate":null, "conditionAssessDetail":null, "conditionAssessId":6, "damHeight":99, "damLength":5700, "distance":null, "drainageArea":993, "eapId":1, "dsacAssignedDate":"2022-08-12T12:00:00.000Z", "eapMeetsGuidelinesId":1, "emergencyContactsUpdated":"2025-05-02T12:00:00.000Z", "eapLastRevDate":"2024-05-17T12:00:00.000Z", "enforcementAuthorityId":0, "federalId":"OK10315", "oldFederalId":"OK10315", "hazardId":4, "hydraulicHeight":95, "inspectionAuthorityId":0, "inspectionDate":"2022-06-22T12:00:00.000Z", "inspectionFrequency":5, "jurisdictionAuthorityId":0, "latitude":34.941748406, "lengthOfLocks":0, "secondaryLengthOfLocks":null, "longitude":-94.716956132, "maxDischarge":170910, "maxStorage":427481, "nidHeight":99, "nidStorage":427481, "normalStorage":51589, "numberOfLocks":0, "operationalStatusDate":"2022-08-12T12:00:00.000Z", "operationalStatusId":2, "originalDesignerName":null, "otherStructureId":null, "permittingAuthorityId":0, "politicalPartyId":null, "privateDamId":null, "projectDescription":"The United States Army Corps of Engineers completed construction of Wister Dam in 1949 with the primary purpose to reduce flooding in downstream communities as well as water supply and navigation. The project also provides fish and wildlife habitats and recreation opportunities. Wister Dam is located on the Poteau River in Leflore County, OK, about 2 miles south of Wister, OK, 7 miles northwest of Heavener, OK, and 35 miles southwest of Fort Smith, AR. The features comprising the dam include a earthen embankment, a ungated spillway, gate controlled conduits that run through the earthen dam, and an earthen dike (Glendale Dike). During large storm events, the dam holds back excess water to reduce flooding downstream. Water releases are managed by the conduits running through the earthen dam for lower lake levels and over the ungated spillway for higher lake levels. Oklahoma State Highway 270 runs across the top of the dam and connects the town of Wister and the city of Heavener.", "riskCharSummary":"USACE completed a risk assessment in 2022 and classified the risk associated with Wister Dam as moderate. The risk is primarily driven by the potential for water to seep along the conduit in the earthen embankment eventually leading to erosion and breach. In the unlikely event of dam failure, catastrophic flooding would occur downstream inundating numerous residential areas resulting in loss of life and widespread economic impacts. The most immediate impacted areas with major population centers would be the town of Wister and the city of Poteau. Other impacted areas include Franklin, Crawford, and Sebastian Counties in Arkansas and Le Flore and Sequoyah Counties in Oklahoma.\n\nThere is also flood risk associated with the dam due to normal operation which could include large releases through the ungated spillway during a flood. Although the flooding would be less significant during this scenario compared to a dam breach, widespread economic impacts and life loss could still be possible due to the potential extent of flooding.", "riskManagementMeasures":"USACE is taking several actions to manage and reduce the risk Wister Dam poses to the community. Based on the results of the last risk assessment, USACE will conduct a Dam Safety Modification Study to evaluate the need to modify the dam and reduce risk. Additional actions include conducting emergency exercises with local and state emergency responders to enhance evacuation planning, routine updates to the EAP to improve emergency response actions, and development of a detailed communication plan for the dam. Additionally, the dam is well maintained through continuous operations and maintenance activities and USACE conducts detailed inspections of the dam during both normal reservoir levels and during flood events to ensure the integrity of the structure. The dam also has a robust instrumentation program to monitor for changing conditions", "riverName":"POTEAU RIVER", "separateStructuresCount":0, "sourceAgency":"US Army Corps of Engineers", "spillwayTypeId":3, "spillwayWidth":600, "stateFedId":"OK10315", "stateRegulatoryAgency":null, "stateRegulatedId":0, "structuralHeight":99, "submitDate":"2023-02-16T17:25:34.012Z", "surfaceArea":6745, "volume":2481000, "widthOfLocks":0, "secondaryWidthOfLocks":null, "yearCompleted":1949, "congDist":"Congressional District 02, Oklahoma", "city":"POTEAU", "county":"Le Flore", "aiannh":"Choctaw OTSA", "websiteUrl":"https://www.swt.usace.army.mil/Locations/Tulsa-District-Lakes/Oklahoma/Wister-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":"Wister Lake", "ownerNames":"USACE - Tulsa District", "ownerTypeIds":"3", "primaryDamTypeId":8, "primaryOwnerTypeId":3, "primaryPurposeId":9, "purposeIds":"9;12;8", "dsacId":3, "femaRegion":"6", "lastEapExcerDate":"2025-05-02T12:00:00.000Z", "dataUpdated":"2025-07-15T19:37:40.840Z", "usaceDistrict":"Tulsa District", "noConsequencesId":0, "secretaryAgricultureBuiltId":null, "nrcsWatershedAuthorizationId":null, "isAssociatedStructureId":"No", "fedRegulatedId":"Yes", "inundationNidAddedId":1, "damStatusId":2, "huc06":"111101", "doi_region":"ART", "doi_region_name":"Arkansas-Rio Grande-Texas Gulf", "doi_region_number":6, "thirtyYearAverage":124.4736, "tenthPercentile":61.5656, "ninetiethPercentile":160.494 }, "id":3473051, "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/3473051?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/3473051?f=jsonld" }, { "rel":"alternate", "type":"text/html", "title":"This document as HTML", "href":"https://api.wwdh.internetofwater.app/collections/usace-edr/items/3473051?f=html" }, { "rel":"collection", "type":"application/json", "title":"USACE Access2Water API", "href":"https://api.wwdh.internetofwater.app/collections/usace-edr" } ] }