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"units_long_name":"Acre-feet" }, { "slug":"stor.top of dam", "label":"Top of Dam", "parameter":"Stor", "base_parameter":"Stor", "tsid":"CJBrown.Stor.Inst.0.Top of Dam", "latest_value":117781, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of flood", "label":"Top of Flood", "parameter":"Stor", "base_parameter":"Stor", "tsid":"CJBrown.Stor.Inst.0.Top of Flood", "latest_value":63700, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of normal", "label":"Top of Normal", "parameter":"Stor", "base_parameter":"Stor", "tsid":"CJBrown.Stor.Inst.0.Top of Normal", "latest_value":30800, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of overflow", "label":"Top of Overflow", "parameter":"Stor", "base_parameter":"Stor", "tsid":"CJBrown.Stor.Inst.0.Top of Overflow", "latest_value":63700, "units":"ac-ft", "units_long_name":"Acre-feet" } ], "id":550222, "associatedStructuresCount":0, "conditionAssessDate":null, "conditionAssessDetail":null, "conditionAssessId":6, "damHeight":null, "damLength":6620, "distance":2, "drainageArea":82, "eapId":1, "dsacAssignedDate":"2025-05-13T12:00:00.000Z", "eapMeetsGuidelinesId":1, "emergencyContactsUpdated":"2025-02-28T12:00:00.000Z", "eapLastRevDate":"2025-02-28T12:00:00.000Z", "enforcementAuthorityId":0, "federalId":"OH00028", "oldFederalId":"OH00028", "hazardId":4, "hydraulicHeight":70, "inspectionAuthorityId":0, "inspectionDate":"2024-06-10T12:00:00.000Z", "inspectionFrequency":5, "jurisdictionAuthorityId":0, "latitude":39.950001, "lengthOfLocks":0, "secondaryLengthOfLocks":null, "longitude":-83.746674, "maxDischarge":50000, "maxStorage":63700, "nidHeight":98, "nidStorage":63700, "normalStorage":36900, "numberOfLocks":0, "operationalStatusDate":"2015-10-28T12:00:00.000Z", "operationalStatusId":1, "originalDesignerName":null, "otherStructureId":null, "permittingAuthorityId":0, "politicalPartyId":null, "privateDamId":null, "projectDescription":"The U.S. Army Corps of Engineers (USACE) completed Clarence J. Brown Dam in 1973. The dam is located on Buck Creek approximately 7.3 miles above its confluence with the Mad River. The project is located in west-central Ohio, 3.5 miles upstream of Springfield, Ohio, and 25 miles east of Dayton, Ohio. The dam project consists of a 6,620-foot long, earth-filled embankment having a maximum height of 72 feet, a gate-controlled outlet works, and a concrete lined chute spillway. The project reduces flood damages along approximately 7.3 miles of Buck Creek and approximately 26 miles of the Mad River, and to a much lesser extent the Great Miami River to its confluence with the Ohio River. The drainage area of the project is approximately 82 square miles. The record pool occurred in January 2005 and reached an EL. 1015 ft NAVD88. The dam has not experienced a spillway flow event.", "riskCharSummary":"USACE completed a risk assessment of CJ Brown Dam in 2025 that classified the risk of the project as a Dam Safety Action Classification (DSAC) 3 which is considered Moderate relative to the dams USACE owns and operates. The dam reduces the risk of flooding to downstream communities however, it does not eliminate the risk completely. Even when the dam operates as intended, downstream flooding could still occur if a very large rainfall event were to result in unusually large quantities of water to flow through the dam spillway. There is also an unlikely, but far more devastating scenario that would produce significant flooding, which is spillway flows destabilizing the concrete lining of the spillway leading to loss of the concrete floor and deepening of the spillway channel. Another very unlikely scenario, is internal erosion of foundation material at the right abutment during a period of high reservoir levels. In these scenarios, an uncontrolled surge of water could flow out of the reservoir, resulting in potentially deadly flooding along Buck Creek and the Mad River.\n\nIf a dam failure occurred, water from the reservoir would flood downstream communities. The largest impacts include the city of Springfield, Ohio and the Wright Patterson Air Force Base. Huffman Dam, operated by a local municipality, would prevent flood waters from reaching Dayton, Ohio. In Springfield critical infrastructure that could be impacted by flood waters includes wastewater treatment plants, fire stations, police stations, schools, and electrical substations.", "riskManagementMeasures":"USACE is continuously taking significant steps to reduce the risk to the public. This includes working closely with local emergency managers, regularly updating the Emergency Action Plan, and conducting emergency exercises with state and local response teams. USACE utilizes the latest forecast and stream gauge information and coordinates closely with the National Weather Service concerning conditions both upstream and downstream of the dam including inflow, outflow, and precipitation. Rainfall forecasts are used to determine when high pool events may occur. USACE regularly inspects and monitors instruments to check the health of the dam. The frequency of these checks increases when the 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.", "riverName":"BUCK CREEK", "separateStructuresCount":0, "sourceAgency":"US Army Corps of Engineers", "spillwayTypeId":3, "spillwayWidth":310, "stateFedId":"OH00028", "stateRegulatoryAgency":null, "stateRegulatedId":0, "structuralHeight":98, "submitDate":"2023-12-06T14:36:50.848Z", "surfaceArea":2120, "volume":2122802, "widthOfLocks":0, "secondaryWidthOfLocks":null, "yearCompleted":1973, "congDist":"Congressional District 15, Ohio", "city":"SPRINGFIELD", "county":"Clark", "aiannh":null, "websiteUrl":"https://www.usace.army.mil/Missions/Civil-Works/Dam-Safety-Program/Article/2870967/dam-safety-program/", "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":"CELRL", "otherNames":"Clarence J Brown Reservoir", "ownerNames":"USACE - Louisville District", "ownerTypeIds":"3", "primaryDamTypeId":8, "primaryOwnerTypeId":3, "primaryPurposeId":9, "purposeIds":"9;12;5", "dsacId":3, "femaRegion":"5", "lastEapExcerDate":"2025-03-27T12:00:00.000Z", "dataUpdated":"2025-06-18T15:55:33.872Z", "usaceDistrict":"Louisville District", "noConsequencesId":0, "secretaryAgricultureBuiltId":null, "nrcsWatershedAuthorizationId":null, "isAssociatedStructureId":"No", "fedRegulatedId":"Yes", "inundationNidAddedId":1, "damStatusId":2, "huc06":"050800", "doi_region":null, "doi_region_name":"Great Lakes", "doi_region_number":3, "thirtyYearAverage":196.928, "tenthPercentile":148.9576, "ninetiethPercentile":256.0918 }, "id":215109, "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/215109?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/215109?f=jsonld" }, { "rel":"alternate", "type":"text/html", "title":"This document as HTML", "href":"https://api.wwdh.internetofwater.app/collections/usace-edr/items/215109?f=html" }, { "rel":"collection", "type":"application/json", "title":"USACE Access2Water API", "href":"https://api.wwdh.internetofwater.app/collections/usace-edr" } ] }