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"units_long_name":"Feet" }, { "slug":"elev.top of flood", "label":"Top of Flood", "parameter":"Elev", "base_parameter":"Elev", "tsid":"ALAT2.Elev.Inst.0.Top of Flood", "latest_value":556, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of inactive", "label":"Top of Inactive", "parameter":"Elev", "base_parameter":"Elev", "tsid":"ALAT2.Elev.Inst.0.Top of Inactive", "latest_value":503, "units":"ft", "units_long_name":"Feet" }, { "slug":"stor.bottom of inactive", "label":"Bottom of Inactive", "parameter":"Stor", "base_parameter":"Stor", "tsid":"ALAT2.Stor.Inst.0.Bottom of Inactive", "latest_value":0, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.design capacity", "label":"Design Capacity", "parameter":"Stor", "base_parameter":"Stor", "tsid":"ALAT2.Stor.Inst.0.Design Capacity", "latest_value":350977, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.maximum tailwater", "label":"Maximum Tailwater", "parameter":"Stor", "base_parameter":"Stor", "tsid":"ALAT2.Stor.Inst.0.Maximum Tailwater", "latest_value":1734.4, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.spillway crest", "label":"Spillway Crest", "parameter":"Stor", "base_parameter":"Stor", "tsid":"ALAT2.Stor.Inst.0.Spillway Crest", "latest_value":213700, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.streambed", "label":"Streambed", "parameter":"Stor", "base_parameter":"Stor", "tsid":"ALAT2.Stor.Inst.0.Streambed", "latest_value":0, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of conservation", "label":"Top of Conservation", "parameter":"Stor", "base_parameter":"Stor", "tsid":"ALAT2.Stor.Inst.0.Top of Conservation", "latest_value":43293, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of flood", "label":"Top of Flood", "parameter":"Stor", "base_parameter":"Stor", "tsid":"ALAT2.Stor.Inst.0.Top of Flood", "latest_value":135636, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of inactive", "label":"Top of Inactive", "parameter":"Stor", "base_parameter":"Stor", "tsid":"ALAT2.Stor.Inst.0.Top of Inactive", "latest_value":36, "units":"ac-ft", "units_long_name":"Acre-feet" } ], "id":550043, "associatedStructuresCount":0, "conditionAssessDate":null, "conditionAssessDetail":null, "conditionAssessId":6, "damHeight":104, "damLength":11800, "distance":null, "drainageArea":252, "eapId":1, "dsacAssignedDate":"2013-08-27T12:00:00.000Z", "eapMeetsGuidelinesId":1, "emergencyContactsUpdated":"2024-09-10T12:00:00.000Z", "eapLastRevDate":"2021-03-09T12:00:00.000Z", "enforcementAuthorityId":0, "federalId":"TX08004", "oldFederalId":"TX08004", "hazardId":4, "hydraulicHeight":100, "inspectionAuthorityId":0, "inspectionDate":"2021-04-16T12:00:00.000Z", "inspectionFrequency":5, "jurisdictionAuthorityId":0, "latitude":31.89824608, "lengthOfLocks":0, "secondaryLengthOfLocks":null, "longitude":-97.205195976, "maxDischarge":126800, "maxStorage":420840, "nidHeight":104, "nidStorage":420840, "normalStorage":45962, "numberOfLocks":0, "operationalStatusDate":"2013-08-27T12:00:00.000Z", "operationalStatusId":1, "originalDesignerName":null, "otherStructureId":null, "permittingAuthorityId":0, "politicalPartyId":null, "privateDamId":null, "projectDescription":"The United States Army Corps of Engineers (USACE) completed construction of Aquilla Dam in May 1983 in accordance with the Flood Control Act approved 13 August 1968 (Public Law 90-483) (SD 52/90/1) and the Public Works Appropriation Act of 1958, approved 26 August 1957 (Public Law 85-167). It is located approximately 3 miles east of the city of Aquilla in Hill County, Texas. Aquilla Dam is operated for optimum flood reductions on the Brazos River, and is operated in conjunction with other Brazos River projects. The dam reduces the risk of downstream flooding on Aquilla Creek from the dam to the confluence of the Brazos River by holding back waters during heavy rain events. The dam is an earthen dam, approximately 2.2 miles long, with both a gated concrete conduit in the middle as well as an un-gated spillway on the eastern end. The gated concrete conduit, or pipe through the dam, is for releasing water in a regulated manner during and after flood events. The spillway on the eastern end holds water to 18-feet below the top of the dam; however, there are no gates to regulate water flows when the reservoir rises above that level. Any water above that level will flow downstream. Additional benefits of the dam are water supply, recreation, and fish and wildlife management.", "riskCharSummary":"Although Aquilla Dam reduces the risk of flooding to downstream communities, the dam does not eliminate the risk of flooding. Aquilla Dam was designed to reduce the peak flooding levels downstream without risking the structural integrity of the dam. The U.S. Army Corps of Engineers (USACE) completed a risk assessment in June 2016 and classified the risk associated with the project as low. This classification is based on an extremely unlikely flood event which could cause overtopping of the embankment, water to flow through the dam\u2019s foundation near the concrete conduit and eventually weaken the dam, and instability of the embankment on the far western end. In the remote event of a dam breach, the largest impacts would be to the City of Waco, Texas located 25 river miles below the dam. In any of these unlikely scenarios, downstream flooding in Waco, Texas would occur within 10 hours of breach and could be as deep as a two-story structure destroying critical infrastructure such as fire stations, schools, and universities as well as residential, commercial, and industrial developments. In addition, some evacuation routes would be under water, increasing evacuation distances. The most likely scenario that could result in downstream flooding is high volume releases from Aquilla 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. Surcharge releases through the spillway during the largest expected flood in the watershed would put thousands of people at risk and flood waters could be as deep as a two-story building. Although the large downstream communities have well-practiced emergency action plans, and local emergency managers are aware of the unlikely potential for dam failure, breach of the dam would result in significant loss of life and severe economic damages.", "riskManagementMeasures":"In order to lower the risks associated with the dam, inspections and monitoring are performed regularly to ensure the health and safety of the dam. Surveillance and inspections are increased as the lake elevation rises. Routine maintenance and dam safety monitoring are performed to ensure the dam is functioning as designed. Additionally, Aquilla Dam is well maintained with an instrumentation and monitoring system to allow USACE staff to evaluate the dam for changing conditions. The Emergency Action Plan is updated and exercised annually, improving emergency response and coordination between USACE elements and downstream federal, state, county, city agencies, and stakeholders. USACE also communicates risks associated with Aquilla Dam annually with stakeholders and Emergency Managers.", "riverName":"AQUILLA CREEK", "separateStructuresCount":0, "sourceAgency":"US Army Corps of Engineers", "spillwayTypeId":3, "spillwayWidth":1200, "stateFedId":"TX08004", "stateRegulatoryAgency":null, "stateRegulatedId":0, "structuralHeight":104, "submitDate":"2023-02-24T00:00:00.000Z", "surfaceArea":3280, "volume":7370000, "widthOfLocks":0, "secondaryWidthOfLocks":null, "yearCompleted":1983, "congDist":"Congressional District 06, Texas", "city":"WACO", "county":"Hill", "aiannh":null, "websiteUrl":"https://www.swf-wc.usace.army.mil/aquilla/", "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":"Aquilla Lake", "ownerNames":"USACE - Fort Worth District", "ownerTypeIds":"3", "primaryDamTypeId":8, "primaryOwnerTypeId":3, "primaryPurposeId":9, "purposeIds":"9;4;5;8", "dsacId":4, "femaRegion":"6", "lastEapExcerDate":"2024-10-10T12:00:00.000Z", "dataUpdated":"2025-05-02T12:00:00.000Z", "usaceDistrict":"Fort Worth District", "noConsequencesId":0, "secretaryAgricultureBuiltId":null, "nrcsWatershedAuthorizationId":null, "isAssociatedStructureId":"No", "fedRegulatedId":"Yes", "inundationNidAddedId":1, "damStatusId":2, "huc06":"120602", "doi_region":"ART", "doi_region_name":"Arkansas-Rio Grande-Texas Gulf", "doi_region_number":6 }, "id":143048, "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/143048?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/143048?f=jsonld" }, { "rel":"alternate", "type":"text/html", "title":"This document as HTML", "href":"https://api.wwdh.internetofwater.app/collections/usace-edr/items/143048?f=html" }, { "rel":"collection", "type":"application/json", "title":"USACE Access2Water API", "href":"https://api.wwdh.internetofwater.app/collections/usace-edr" } ] }