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], "id":550057, "associatedStructuresCount":0, "conditionAssessDate":null, "conditionAssessDetail":null, "conditionAssessId":6, "damHeight":79, "damLength":28072, "distance":null, "drainageArea":476, "eapId":1, "dsacAssignedDate":"2020-05-04T12:00:00.000Z", "eapMeetsGuidelinesId":1, "emergencyContactsUpdated":"2024-09-10T12:00:00.000Z", "eapLastRevDate":"2020-09-22T12:00:00.000Z", "enforcementAuthorityId":0, "federalId":"TX08012", "oldFederalId":"TX08012", "hazardId":4, "hydraulicHeight":74, "inspectionAuthorityId":0, "inspectionDate":"2024-03-20T12:00:00.000Z", "inspectionFrequency":5, "jurisdictionAuthorityId":0, "latitude":33.3318770430001, "lengthOfLocks":0, "secondaryLengthOfLocks":null, "longitude":-95.627898348, "maxDischarge":134700, "maxStorage":797300, "nidHeight":95, "nidStorage":797300, "normalStorage":310800, "numberOfLocks":0, "operationalStatusDate":"2020-05-04T12:00:00.000Z", "operationalStatusId":1, "originalDesignerName":null, "otherStructureId":null, "permittingAuthorityId":0, "politicalPartyId":null, "privateDamId":null, "projectDescription":"The United States Army Corps of Engineers (USACE) completed construction of Cooper Dam in 1991 with the project purpose to provide flood risk management, water supply, environmental regulation, and recreation. Cooper Dam impounds Jim Chapman Lake and is located on the Sulphur River about 4 miles southeast of Cooper, 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 $31 million (adjusted to 2020 dollars). Cooper Dam works in conjunction with Wright Patman Dam (National Inventory of Dams TX00021) 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 downstream flooding. After the storm passes and the Red River Basin recedes, water can be safety released downstream in accordance with the approved water control plan. Water storage and releases are managed by two water control gates operated by onsite USACE personnel. The project is primarily an earthen embankment dam and includes a 700-foot wide concrete spillway, which holds water to 18-feet below the top of the dam to regulate the reservoir when the pool elevation exceeds capacity.", "riskCharSummary":"Although Cooper 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 Cooper Dam through the un-gated spillway during high water events. These surcharge operational releases occur when the reservoir's flood storage capacity is exceeded and excess water flows through the spillway. Cooper Dam is designed to reduce the peak flooding levels downstream without risking the structural integrity of the dam. The United States Army Corps of Engineers (USACE) completed a risk assessment in June 2019 and classified the risk associated with Cooper Dam as very low. This risk classification is primarily driven by the very low probability for dam failure and the small population at risk below Cooper Dam. The potential of breach for Cooper Dam was assessed to be related to three primary risks associated with earthen embankment dams: 1) During an extreme flood event, erosion may occur through the foundation near the old river channel leading to eventual breach of the dam, 2) Erosion along the interface of the outlet works conduit and main embankment during high reservoir elevations could lead to eventual breach of the dam, and 3) Instability of the concrete spillway during surcharge releases leads to slab displacement and uncontrolled erosion of the supporting embankment leading to breach of the dam. In the remote event of a dam breach the largest impacts would be to the city of Shreveport, Louisiana. Potentially impacted infrastructure includes road networks, electrical substations, communication facilities, police and fire stations, hospitals, airports, and schools. Wright Patman Lake and levee systems in the downstream populated areas would not experience overtopping and are likely to contain the floodwaters. Although the downstream communities have well-practiced emergency action plans; 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 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 interim 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 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":700, "stateFedId":"TX08012", "stateRegulatoryAgency":null, "stateRegulatedId":0, "structuralHeight":95, "submitDate":"2023-10-13T00:00:00.000Z", "surfaceArea":19280, "volume":9500000, "widthOfLocks":0, "secondaryWidthOfLocks":null, "yearCompleted":1991, "congDist":"Congressional District 04, Texas", "city":"TALCO", "county":"Delta", "aiannh":null, "websiteUrl":"https://www.swf-wc.usace.army.mil/cooper/", "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":"CESWF", "otherNames":"Jim Chapman Lake", "ownerNames":"USACE - Fort Worth District", "ownerTypeIds":"3", "primaryDamTypeId":8, "primaryOwnerTypeId":3, "primaryPurposeId":9, "purposeIds":"9;4;5;8", "dsacId":5, "femaRegion":"6", "lastEapExcerDate":"2025-05-08T12:00:00.000Z", "dataUpdated":"2025-06-09T12:00:00.000Z", "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 }, "id":235048, "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/235048?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/235048?f=jsonld" }, { "rel":"alternate", "type":"text/html", "title":"This document as HTML", "href":"https://api.wwdh.internetofwater.app/collections/usace-edr/items/235048?f=html" }, { "rel":"collection", "type":"application/json", "title":"USACE Access2Water API", "href":"https://api.wwdh.internetofwater.app/collections/usace-edr" } ] }