{ "bbox":null, "type":"Feature", "geometry":{ "bbox":null, "type":"Point", "coordinates":[ -84.49456, 39.25991 ] }, "properties":{ "provider":"LRL", "code":"WestFork", "slug":"westfork", "elevation":675.0, "horizontal_datum":"NAD27", "vertical_datum":"NGVD29", "state":"OH", "kind":"PROJECT", "nearest_city":"Cincinnati, OH", "public_name":"West Fork of Mill Creek Lake", "location_code":1190109, "nsid":null, "aliases":{ "NIDID":"OH00029" }, "timeseries":[ { "tsid":"WestFork.Elev.Inst.0.0.lrldlb-rev", "label":"Elevation", "base_parameter":"Elev", "parameter":"Elev", "unit":"ft", "unit_long_name":"Feet", "latest_time":"2026-04-14T10:00:00Z", "latest_value":675.24, "delta24h":null, "sort_order":1, "results":null }, { "tsid":"WestFork.Stor.Inst.1Hour.0.lrldlb-comp", "label":"Flood Storage", "base_parameter":"Stor", "parameter":"Stor", "unit":"ac-ft", "unit_long_name":"Acre-feet", "latest_time":"2026-04-14T10:00:00Z", "latest_value":961.56, "delta24h":null, "sort_order":11, "results":null }, { "tsid":"WestFork.Precip.Total.~1Day.1Day.lrldlb-rev", "label":"Precipitation", "base_parameter":"Precip", "parameter":"Precip", "unit":"in", "unit_long_name":"Inches", "latest_time":"2026-04-14T10:00:00Z", "latest_value":0.0, "delta24h":null, "sort_order":16, "results":null }, { "tsid":"WestFork.Flow-Outflow.Inst.0.0.lrldlb-comp", "label":"Outflow", "base_parameter":"Flow", "parameter":"Flow-Outflow", "unit":"cfs", "unit_long_name":"Cubic feet per second", "latest_time":"2026-04-14T10:00:00Z", "latest_value":2.0, "delta24h":null, "sort_order":7, "results":null }, { "tsid":"WestFork.Flow-Inflow.Ave.1Hour.6Hours.lrldlb-comp", "label":"Inflow", "base_parameter":"Flow", "parameter":"Flow-Inflow", "unit":"cfs", "unit_long_name":"Cubic feet per second", "latest_time":"2026-04-14T10:00:00Z", "latest_value":0.0, "delta24h":null, "sort_order":6, "results":null }, { "tsid":"WestFork.Stor.Inst.1Hour.0.lrldlb-comp", "label":"Conservation Storage", "base_parameter":"Stor", "parameter":"Stor", 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Conservation", "parameter":"Stor", "base_parameter":"Stor", "tsid":"WestFork.Stor.Inst.0.Top of Conservation", "latest_value":915, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of flood", "label":"Top of Flood", "parameter":"Stor", "base_parameter":"Stor", "tsid":"WestFork.Stor.Inst.0.Top of Flood", "latest_value":10721, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of normal", "label":"Top of Normal", "parameter":"Stor", "base_parameter":"Stor", "tsid":"WestFork.Stor.Inst.0.Top of Normal", "latest_value":915, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of overflow", "label":"Top of Overflow", "parameter":"Stor", "base_parameter":"Stor", "tsid":"WestFork.Stor.Inst.0.Top of Overflow", "latest_value":10721, "units":"ac-ft", "units_long_name":"Acre-feet" } ], "id":550160, "associatedStructuresCount":0, "conditionAssessDate":null, "conditionAssessDetail":null, "conditionAssessId":6, "damHeight":null, "damLength":3966, "distance":2, "drainageArea":29, "eapId":1, "dsacAssignedDate":"2021-06-23T12:00:00.000Z", "eapMeetsGuidelinesId":1, "emergencyContactsUpdated":"2025-02-28T12:00:00.000Z", "eapLastRevDate":"2022-05-12T12:00:00.000Z", "enforcementAuthorityId":0, "federalId":"OH00029", "oldFederalId":"OH00029", "hazardId":4, "hydraulicHeight":92, "inspectionAuthorityId":0, "inspectionDate":"2025-05-15T12:00:00.000Z", "inspectionFrequency":5, "jurisdictionAuthorityId":0, "latitude":39.260311394, "lengthOfLocks":0, "secondaryLengthOfLocks":null, "longitude":-84.4956781019999, "maxDischarge":19500, "maxStorage":11380, "nidHeight":106, "nidStorage":11380, "normalStorage":1530, "numberOfLocks":0, "operationalStatusDate":"2021-06-23T12:00:00.000Z", "operationalStatusId":1, "originalDesignerName":null, "otherStructureId":null, "permittingAuthorityId":0, "politicalPartyId":null, "privateDamId":null, "projectDescription":"The U.S. Army Corps of Engineers (USACE) completed West Fork Dam in 1952. West Fork Lake Dam is located on the West Fork of Mill Creek in Cincinnati, OH. The project consists of a 1,100-foot-long earthen embankment with a maximum height of 100 feet, a gate-controlled outlet works along the base of the right abutment, a 2,970 ft long dike along the left abutment, and an uncontrolled open cut spillway through the right abutment. The project reduces flood damages along approximately 6.5 miles of the West Fork of Mill Creek and approximately 18.4 miles of Mill Creek to its confluence with the Ohio River. The dam has a drainage area of 29.5 square miles. The record pool occurred in March 2008 and reached an elevation of 698.2 ft-NAVD88 which is approximately 3.23 feet below spillway crest (EL. 701.43 ft-NAVD88).", "riskCharSummary":"The U.S. Army Corps of Engineers (USACE) completed a risk assessment of West Fork Dam in June 2021 that classified the risk of the project as a Dam Safety Action Classification (DSAC) 4 which is considered Low 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 a very unlikely scenario that would produce significant flooding which is internal erosion of the dam\u2019s embankment along the conduit. In this scenario, an uncontrolled surge of water could flow out of the reservoir, resulting in potentially deadly flooding along Mill Creek.\n\nIf a dam failure occurred, water from the reservoir would flood downstream communities. The largest impacts would be to the communities of St. Bernard, Wyoming, Arlington Heights, Evendale, Forest Park, Lincoln Heights, Lockland, Reading, Cincinnati, Elmwood Place, Woodlawn, New Richmond, New Burlington, and Pleasant Hills, Ohio. Critical infrastructure potentially impacted include fire stations, schools, emergency medical services, and some electrical power plants.", "riskManagementMeasures":"USACE is continuously taking 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":"WEST FORK OF MILL CREEK", "separateStructuresCount":0, "sourceAgency":"US Army Corps of Engineers", "spillwayTypeId":3, "spillwayWidth":44, "stateFedId":"OH00029", "stateRegulatoryAgency":null, "stateRegulatedId":0, "structuralHeight":106, "submitDate":"2023-12-06T15:42:39.032Z", "surfaceArea":183, "volume":566300, "widthOfLocks":0, "secondaryWidthOfLocks":null, "yearCompleted":1952, "congDist":"Congressional District 08, Ohio", "city":"WOODLAND", "county":"Hamilton", "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":"West Fork of Mill Creek Lake", "ownerNames":"USACE - Louisville District", "ownerTypeIds":"3", "primaryDamTypeId":8, "primaryOwnerTypeId":3, "primaryPurposeId":9, "purposeIds":"9;5", "dsacId":4, "femaRegion":"5", "lastEapExcerDate":"2025-02-28T12:00:00.000Z", "dataUpdated":"2025-06-06T12:00:00.000Z", "usaceDistrict":"Louisville District", "noConsequencesId":0, "secretaryAgricultureBuiltId":null, "nrcsWatershedAuthorizationId":null, "isAssociatedStructureId":"No", "fedRegulatedId":"Yes", "inundationNidAddedId":1, "damStatusId":2, "huc06":"050902", "doi_region":null, "doi_region_name":"Great Lakes", "doi_region_number":3 }, "id":1190109, "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/1190109?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/1190109?f=jsonld" }, { "rel":"alternate", "type":"text/html", "title":"This document as HTML", "href":"https://api.wwdh.internetofwater.app/collections/usace-edr/items/1190109?f=html" }, { "rel":"collection", "type":"application/json", "title":"USACE Access2Water API", "href":"https://api.wwdh.internetofwater.app/collections/usace-edr" } ] }