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} ], "id":549813, "associatedStructuresCount":0, "conditionAssessDate":null, "conditionAssessDetail":null, "conditionAssessId":6, "damHeight":283, "damLength":975, "distance":null, "drainageArea":4770, "eapId":1, "dsacAssignedDate":"2021-06-23T12:00:00.000Z", "eapMeetsGuidelinesId":1, "emergencyContactsUpdated":"2025-04-22T12:00:00.000Z", "eapLastRevDate":"2021-10-05T12:00:00.000Z", "enforcementAuthorityId":0, "federalId":"AZ82203", "oldFederalId":"AZ82203", "hazardId":4, "hydraulicHeight":278, "inspectionAuthorityId":0, "inspectionDate":"2025-02-18T12:00:00.000Z", "inspectionFrequency":5, "jurisdictionAuthorityId":0, "latitude":34.232796622, "lengthOfLocks":0, "secondaryLengthOfLocks":null, "longitude":-113.6012666839999, "maxDischarge":41500, "maxStorage":1409000, "nidHeight":283, "nidStorage":1409000, "normalStorage":0, "numberOfLocks":0, "operationalStatusDate":"2021-06-23T12:00:00.000Z", "operationalStatusId":2, "originalDesignerName":null, "otherStructureId":null, "permittingAuthorityId":0, "politicalPartyId":null, "privateDamId":null, "projectDescription":"Alamo Dam is located on the Bill Williams River, 32 miles upstream from its confluence with Lake Havasu on the Colorado River. The dam straddles the border of La Paz and Mohave Counties, Arizona, about 2.5 miles downstream from where Alamo Crossing once was before the reservoir was impounded. The US Army Corps of Engineers (USACE) built Alamo Dam in 1968 as a multipurpose project for flood risk management, water conservation and supply, and recreation. While hydropower was initially authorized for the project, this purpose was determined to not be feasible and has never been constructed. The project is also authorized to provide fish and wildlife benefits both upstream and downstream of the dam, so long as it does not reduce flood risk management and recreational benefits. The main features of Alamo Dam consist of an earthen embankment dam, an outlet works, and a detached broad crested spillway. The dam length is 975 feet and has a height of 283 feet above the original Bill Williams River streambed. Outflow through the dam is controlled using the outlet works gates. Additional outflow capacity would utilize the unregulated spillway on the right side of the project. The project reduces flooding risk to the community of Parker, and also provides flood protection to important arterial highways (State Hwy 95) and agricultural lands downstream.", "riskCharSummary":"In 2020, USACE conducted a periodic risk assessment for Alamo Dam and the dam was classified as a high risk. This characterization indicates that the combination of a life or economic consequences with a likelihood of failure is high, and USACE considers this level of life-risk unacceptable except in extraordinary circumstances. The incremental risks are primarily driven by the potential for overtopping of the embankment from an extreme flood event which could result in downstream consequences. Seismic concerns were evaluated but did not contribute to the risk. The primary consequence centers are La Paz and Mohave Counties, Arizona and Riverside County, California. The estimated population at risk due to dam failure would be approximately 28,100 for these communities. Economic consequences are estimated to be over $2.5 Billion dollars.", "riskManagementMeasures":"To ensure USACE is taking all steps to reduce the risk to the public, USACE will continue to work closely with federal, state, and local emergency managers, conducting emergency exercises and incorporating any new information into the Alamo Dam Emergency Action Plan. USACE closely follows rainfall forecasts to determine when high water events may occur to provide information for any necessary flood warnings. USACE is working with local communities to provide opportunities to engage with residents and schools to help them understand how they can better prepare for a flood. All dam safety staff are regularly trained to monitor and evaluate the condition of the dam based on key risk components. USACE regularly inspects and monitors instruments to check the health of the dam and increase this monitoring during lake level rises. This ensures that the structure is performing as designed and could help detect any areas of potential concern. Regular maintenance and repairs are performed as needed to keep the dam functioning properly. Future risk communication activities include updates to the Emergency Action Plan and coordinating these plans with first responders and the development of a formal Risk Communication Plan.", "riverName":"BILL WILLIAMS RIVER", "separateStructuresCount":0, "sourceAgency":"US Army Corps of Engineers", "spillwayTypeId":3, "spillwayWidth":110, "stateFedId":"AZ82203", "stateRegulatoryAgency":null, "stateRegulatedId":0, "structuralHeight":null, "submitDate":"2023-02-16T17:25:15.317Z", "surfaceArea":41500, "volume":0, "widthOfLocks":0, "secondaryWidthOfLocks":null, "yearCompleted":1968, "congDist":"Congressional District 09, Arizona", "city":"PARKER", "county":"Mohave", "aiannh":null, "websiteUrl":"https://www.spl.usace.army.mil/Missions/Asset-Management/Alamo-Dam/", "coreTypeIds":null, "damTypeIds":"8", "fedConstructionIds":"1", "fedDesignIds":"1", "fedFundingIds":"1", "fedInspectionIds":"1", "fedOperationIds":"1", "fedOtherIds":"1", "fedOwnerIds":"1", "fedRegulatoryIds":"1", "formerNames":null, "foundationTypeIds":null, "nonFederalDamOnFederalId":0, "designerNames":"CESPL", "otherNames":"Alamo Lake", "ownerNames":"USACE - Los Angeles District", "ownerTypeIds":"3", "primaryDamTypeId":8, "primaryOwnerTypeId":3, "primaryPurposeId":9, "purposeIds":"9;4;5", "dsacId":2, "femaRegion":"9", "lastEapExcerDate":"2023-06-05T12:00:00.000Z", "dataUpdated":"2025-05-16T12:00:00.000Z", "usaceDistrict":"Los Angeles District", "noConsequencesId":0, "secretaryAgricultureBuiltId":null, "nrcsWatershedAuthorizationId":null, "isAssociatedStructureId":"No", "fedRegulatedId":"Yes", "inundationNidAddedId":1, "damStatusId":2, "huc06":"150302", "doi_region":"LCB", "doi_region_name":"Lower Colorado Basin", "doi_region_number":8 }, "id":157145, "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/157145?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/157145?f=jsonld" }, { "rel":"alternate", "type":"text/html", "title":"This document as HTML", "href":"https://api.wwdh.internetofwater.app/collections/usace-edr/items/157145?f=html" }, { "rel":"collection", "type":"application/json", "title":"USACE Access2Water API", "href":"https://api.wwdh.internetofwater.app/collections/usace-edr" } ] }