{ "bbox":null, "type":"Feature", "geometry":{ "bbox":null, "type":"Point", "coordinates":[ -94.16, 33.305 ] }, "properties":{ "provider":"SWF", "code":"TXKT2", "slug":"txkt2", "elevation":0.0, "horizontal_datum":"", "vertical_datum":"LOCAL", "state":"TX", "kind":"PROJECT", "nearest_city":"Redwater, TX", "public_name":"Wright Patman Lake", "location_code":239048, "nsid":null, "aliases":{ "NID Dam Name":"WRIGHT PATMAN DAM AND LAKE", "NIDID":"TX00021" }, "timeseries":[ { "tsid":"TXKT2.Elev.Inst.1Hour.0.Decodes-Rev", "label":"Elevation", "base_parameter":"Elev", "parameter":"Elev", "unit":"ft", "unit_long_name":"Feet", "latest_time":"2026-04-14T22:00:00Z", "latest_value":223.4, "delta24h":null, "sort_order":1, "results":null }, { "tsid":"TXKT2.Flow-Out.Inst.1Hour.0.Rev-SWF-REGI", "label":"Outflow", "base_parameter":"Flow", "parameter":"Flow-Out", "unit":"cfs", "unit_long_name":"Cubic feet per second", "latest_time":"2026-04-14T22:00:00Z", "latest_value":113.16, "delta24h":null, 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"label":"Top of Conservation", "parameter":"Stor", "base_parameter":"Stor", "tsid":"TXKT2.Stor.Inst.0.Top of Conservation", "latest_value":149115.22, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of dam", "label":"Top of Dam", "parameter":"Stor", "base_parameter":"Stor", "tsid":"TXKT2.Stor.Inst.0.Top of Dam", "latest_value":7190595, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of flood", "label":"Top of Flood", "parameter":"Stor", "base_parameter":"Stor", "tsid":"TXKT2.Stor.Inst.0.Top of Flood", "latest_value":2571470, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of inactive", "label":"Top of Inactive", "parameter":"Stor", "base_parameter":"Stor", "tsid":"TXKT2.Stor.Inst.0.Top of Inactive", "latest_value":27, "units":"ac-ft", "units_long_name":"Acre-feet" } ], "id":550039, "associatedStructuresCount":1, "conditionAssessDate":null, "conditionAssessDetail":null, "conditionAssessId":6, "damHeight":106, "damLength":18640, "distance":null, "drainageArea":3443, "eapId":1, "dsacAssignedDate":"2022-12-21T12:00:00.000Z", "eapMeetsGuidelinesId":1, "emergencyContactsUpdated":"2024-04-26T12:00:00.000Z", "eapLastRevDate":"2024-04-26T12:00:00.000Z", "enforcementAuthorityId":0, "federalId":"TX00021", "oldFederalId":"TX00021", "hazardId":4, "hydraulicHeight":101, "inspectionAuthorityId":0, "inspectionDate":"2022-03-15T12:00:00.000Z", "inspectionFrequency":5, "jurisdictionAuthorityId":0, "latitude":33.3127917580001, "lengthOfLocks":0, "secondaryLengthOfLocks":0, "longitude":-94.16142485, "maxDischarge":81000, "maxStorage":6505000, "nidHeight":106, "nidStorage":6505000, "normalStorage":145300, "numberOfLocks":0, "operationalStatusDate":"2022-12-21T12:00:00.000Z", "operationalStatusId":1, "originalDesignerName":null, "otherStructureId":null, "permittingAuthorityId":0, "politicalPartyId":null, "privateDamId":null, "projectDescription":"The United States Army Corps of Engineers (USACE) completed construction of Wright Patman Dam in 1954 with the project purpose to provide flood risk management, water supply, environmental regulation, and recreation. Wright Patman Dam is located on the Sulphur River about 9 miles southwest of Texarkana, Texas. The project is one of 17 USACE flood control projects in a comprehensive plan for flood control on the Red River below Denison Dam, Texas. Since it went into operation, the dam has reduced damage caused by downstream flooding by more than an estimated $129 million (adjusted to 2019 dollars). Wright Patman Dam works in conjunction with Cooper Dam (National Inventory of Dams TX08012) to regulate flows along the Sulphur River which feeds into the Red River. During large storm events, the dam temporarily stores flood waters to manage flooding downstream. After the storm passes and the Red River recedes, water can be safety released downstream in accordance with the approved water control plan. Water storage and releases are managed by four water control gates operated by onsite USACE personnel. The project is primarily an earthen embankment dam and includes a 200-foot wide concrete spillway to regulate the reservoir when its flood storage capacity becomes exhausted as the pool rises above spillway crest elevation 259.5 feet, which is 26.5 feet below top of dam elevation of 286.0 feet.", "riskCharSummary":"Although Wright Patman Dam reduces the risk of flooding to downstream communities, the dam does not eliminate the risk of flooding. The most likely scenario that could result in downstream flooding are high volume releases from Wright Patman Dam through the un-gated spillway during high water events. These surcharge operational releases occur when reservoir's flood storage capacity is exceeded and excess water flows through the spillway. Wright Patman Dam is designed to reduce the peak flooding levels downstream without risking the structural integrity of the dam.\n\nUSACE completed a risk assessment in 2022 and classified the risk associated with Wright Patman Dam as very low. This risk classification is primarily driven by the very low probability for dam failure and the number of large populations at risk below Wright Patman Dam. The potential of breach for Wright Patman Dam was assessed to be related to two primary risks associated with earthen embankment dams: 1) During an extreme flood event, the foundation upon which the dam was built may experience excessive pressures beyond its design which could then lead to erosion of the embankment foundation and eventual breach of the dam, and 2) Differential settlement over time can increase the chance for cracks through the embankment which could reduce the projects ability to withstand large flood events. In the remote event of a dam breach the largest impacts would be to the cities of Shreveport and Bossier City, Louisiana. Potentially impacted infrastructure includes road networks, electrical substations, communication facilities, police and fire stations, hospitals, airports, and schools. In addition, should a breach occur levees in the downstream populated areas would experience overtopping and would not contain the floodwaters. Although the downstream communities have well-practiced emergency action plans; and local emergency managers are aware of the unlikely potential for dam failure; and local emergency managers meet regularly with USACE to discuss emergency response to flood events, breach of the dam from either risk category could result in catastrophic flooding downstream and include widespread economic impacts and significant loss of life.", "riskManagementMeasures":"The United States Army Corps of Engineers (USACE) is continually taking proactive steps to reduce risk and ensure public safety. This includes conducting emergency exercises with local and state emergency responders to enhance evacuation planning; annual updates to the Emergency Action Plan to improve emergency response actions; and development of a detailed communications plan for the dam. USACE will continue to identify and implement risk reduction measures such as stockpiling materials to mitigate the potential for erosion of the embankment or foundation. Additionally, the dam is well maintained and USACE conducts detailed inspections of the dam during both normal lake levels and increased surveillance during flood events to ensure the integrity of the structure. Lastly, the dam has a robust instrumentation and monitoring system to allow USACE staff to evaluate the dam for changing conditions and there are also pre-positioned materials at the project site to perform immediate flood fighting activities as necessary.", "riverName":"Sulphur River", "separateStructuresCount":0, "sourceAgency":"US Army Corps of Engineers", "spillwayTypeId":3, "spillwayWidth":200, "stateFedId":"TX00021", "stateRegulatoryAgency":null, "stateRegulatedId":0, "structuralHeight":106, "submitDate":"2023-10-13T00:00:00.000Z", "surfaceArea":20300, "volume":7370000, "widthOfLocks":0, "secondaryWidthOfLocks":0, "yearCompleted":1954, "congDist":"Congressional District 01, Texas", "city":"Texarkana", "county":"Bowie", "aiannh":null, "websiteUrl":"https://www.swf-wc.usace.army.mil/wrightpatman/", "coreTypeIds":"3", "damTypeIds":"8", "fedConstructionIds":"1", "fedDesignIds":"1", "fedFundingIds":"1", "fedInspectionIds":"1", "fedOperationIds":"1", "fedOtherIds":"1", "fedOwnerIds":"1", "fedRegulatoryIds":"1", "formerNames":"Lake Texarkana Dam", "foundationTypeIds":"3", "nonFederalDamOnFederalId":0, "designerNames":"CESWF", "otherNames":null, "ownerNames":"USACE - Fort Worth District", "ownerTypeIds":"3", "primaryDamTypeId":8, "primaryOwnerTypeId":3, "primaryPurposeId":9, "purposeIds":"9;4;5;8", "dsacId":5, "femaRegion":"6", "lastEapExcerDate":"2025-03-20T12:00:00.000Z", "dataUpdated":"2025-07-07T12:00:00.000Z", "usaceDistrict":"Fort Worth District", "noConsequencesId":0, "secretaryAgricultureBuiltId":null, "nrcsWatershedAuthorizationId":null, "isAssociatedStructureId":"No", "fedRegulatedId":"Yes", "inundationNidAddedId":1, "damStatusId":2, "huc06":"111403", "doi_region":"ART", "doi_region_name":"Arkansas-Rio Grande-Texas Gulf", "doi_region_number":6, "thirtyYearAverage":509.7126, "tenthPercentile":255.555, "ninetiethPercentile":1090.512 }, "id":239048, "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/239048?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/239048?f=jsonld" }, { "rel":"alternate", "type":"text/html", "title":"This document as HTML", "href":"https://api.wwdh.internetofwater.app/collections/usace-edr/items/239048?f=html" }, { "rel":"collection", "type":"application/json", "title":"USACE Access2Water API", "href":"https://api.wwdh.internetofwater.app/collections/usace-edr" } ] }