{ "bbox":null, "type":"Feature", "geometry":{ "bbox":null, "type":"Point", "coordinates":[ -82.3239, 40.6239 ] }, "properties":{ "provider":"LRH", "code":"PleasantHill", "slug":"pleasanthill", "elevation":971.75, "horizontal_datum":"WGS84", "vertical_datum":"NGVD29", "state":"OH", "kind":"PROJECT", "nearest_city":"Perrysville", "public_name":"Pleasant Hill Lake", "location_code":568108, "nsid":null, "aliases":{ "Local Loc ID":"PHC", "NIDID":"OH00001" }, "timeseries":[ { "tsid":"PleasantHill-Lake.Flow.Inst.15Minutes.0.OBS", "label":"Inflow", "base_parameter":"Flow", "parameter":"Flow", "unit":"cfs", "unit_long_name":"Cubic feet per second", "latest_time":"2026-04-14T22:15:00Z", "latest_value":240.98, "delta24h":null, "sort_order":6, "results":null }, { "tsid":"PleasantHill-Lake.Elev.Inst.1Day.0.RUL", "label":"Elevation Rule Curve", "base_parameter":"Elev", "parameter":"Elev", "unit":"ft", "unit_long_name":"Feet", "latest_time":"2026-04-14T17:00:00Z", "latest_value":1020.0, "delta24h":null, "sort_order":2, "results":null }, { "tsid":"PleasantHill-Outflow.Elev.Inst.15Minutes.0.OBS", "label":"Elevation Tailwater", "base_parameter":"Elev", "parameter":"Elev", "unit":"ft", "unit_long_name":"Feet", "latest_time":"2026-04-14T22:15:00Z", "latest_value":970.33, "delta24h":null, "sort_order":3, "results":null }, { "tsid":"PleasantHill-Lake.Stor.Inst.15Minutes.0.OBS", "label":"Flood Storage", "base_parameter":"Stor", "parameter":"Stor", "unit":"ac-ft", "unit_long_name":"Acre-feet", "latest_time":"2026-04-14T22:15:00Z", "latest_value":15957.0, "delta24h":null, "sort_order":11, "results":null }, { "tsid":"PleasantHill-Outflow.Flow.Inst.15Minutes.0.OBS", "label":"Outflow", "base_parameter":"Flow", "parameter":"Flow", "unit":"cfs", "unit_long_name":"Cubic feet per second", "latest_time":"2026-04-14T22:15:00Z", "latest_value":1077.6, "delta24h":null, "sort_order":7, "results":null }, { "tsid":"PleasantHill-Lake.Stor.Inst.15Minutes.0.OBS", "label":"Conservation Storage", "base_parameter":"Stor", "parameter":"Stor", "unit":"ac-ft", "unit_long_name":"Acre-feet", "latest_time":"2026-04-14T22:15:00Z", "latest_value":15957.0, "delta24h":null, "sort_order":13, "results":null }, { "tsid":"PleasantHill-Lake.Elev.Inst.15Minutes.0.OBS", "label":"Elevation", "base_parameter":"Elev", "parameter":"Elev", "unit":"ft", "unit_long_name":"Feet", "latest_time":"2026-04-14T22:15:00Z", "latest_value":1022.73, "delta24h":null, "sort_order":1, "results":null } ], "name":"Pleasant Hill Lake", "hasResopsAverages":"true", "nidId":"OH00001", "nidid":"", "levels":[ { "slug":"elev.bottom of conservation", "label":"Bottom of Conservation", "parameter":"Elev", "base_parameter":"Elev", "tsid":"PleasantHill.Elev.Inst.0.Bottom of Conservation", "latest_value":971.75, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.bottom of flood", "label":"Bottom of Flood", "parameter":"Elev", "base_parameter":"Elev", "tsid":"PleasantHill.Elev.Inst.0.Bottom of Flood", "latest_value":1020, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.streambed", "label":"Streambed", "parameter":"Elev", "base_parameter":"Elev", "tsid":"PleasantHill.Elev.Inst.0.Streambed", "latest_value":972.01, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of conservation", "label":"Top of Conservation", "parameter":"Elev", "base_parameter":"Elev", "tsid":"PleasantHill.Elev.Inst.0.Top of Conservation", "latest_value":1020, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of dam", "label":"Top of Dam", "parameter":"Elev", "base_parameter":"Elev", "tsid":"PleasantHill.Elev.Inst.0.Top of Dam", "latest_value":1085, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of flood", "label":"Top of Flood", "parameter":"Elev", "base_parameter":"Elev", "tsid":"PleasantHill.Elev.Inst.0.Top of Flood", "latest_value":1065, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of flood threat", "label":"Top of Flood Threat", "parameter":"Elev", "base_parameter":"Elev", "tsid":"PleasantHill.Elev.Inst.0.Top of Flood Threat", "latest_value":1038, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of inactive", "label":"Top of Inactive", "parameter":"Elev", "base_parameter":"Elev", "tsid":"PleasantHill.Elev.Inst.0.Top of Inactive", "latest_value":971.75, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of normal", "label":"Top of Normal", "parameter":"Elev", "base_parameter":"Elev", "tsid":"PleasantHill.Elev.Inst.0.Top of Normal", "latest_value":1020, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of record", "label":"Top of Record", "parameter":"Elev", "base_parameter":"Elev", "tsid":"PleasantHill.Elev.Inst.0.Top of Record", "latest_value":1044.01, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of recreation", "label":"Top of Recreation", "parameter":"Elev", "base_parameter":"Elev", "tsid":"PleasantHill.Elev.Inst.0.Top of Recreation", "latest_value":1020, "units":"ft", "units_long_name":"Feet" }, { "slug":"stor.bottom of flood", "label":"Bottom of Flood", "parameter":"Stor", "base_parameter":"Stor", "tsid":"PleasantHill.Stor.Inst.0.Bottom of Flood", "latest_value":13500, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of conservation", "label":"Top of Conservation", "parameter":"Stor", "base_parameter":"Stor", "tsid":"PleasantHill.Stor.Inst.0.Top of Conservation", "latest_value":13500, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of dam", "label":"Top of Dam", "parameter":"Stor", "base_parameter":"Stor", "tsid":"PleasantHill.Stor.Inst.0.Top of Dam", "latest_value":149020.2, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of flood", "label":"Top of Flood", "parameter":"Stor", "base_parameter":"Stor", "tsid":"PleasantHill.Stor.Inst.0.Top of Flood", "latest_value":87700, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of inactive", "label":"Top of Inactive", "parameter":"Stor", "base_parameter":"Stor", "tsid":"PleasantHill.Stor.Inst.0.Top of Inactive", "latest_value":13, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of normal", "label":"Top of Normal", "parameter":"Stor", "base_parameter":"Stor", "tsid":"PleasantHill.Stor.Inst.0.Top of Normal", "latest_value":13500, "units":"ac-ft", "units_long_name":"Acre-feet" } ], "id":550198, "associatedStructuresCount":1, "conditionAssessDate":null, "conditionAssessDetail":null, "conditionAssessId":6, "damHeight":null, "damLength":775, "distance":20, "drainageArea":197, "eapId":1, "dsacAssignedDate":"2019-03-29T12:00:00.000Z", "eapMeetsGuidelinesId":1, "emergencyContactsUpdated":"2024-07-25T12:00:00.000Z", "eapLastRevDate":"2009-12-18T12:00:00.000Z", "enforcementAuthorityId":0, "federalId":"OH00001", "oldFederalId":"OH00001", "hazardId":4, "hydraulicHeight":97, "inspectionAuthorityId":0, "inspectionDate":"2020-08-27T12:00:00.000Z", "inspectionFrequency":5, "jurisdictionAuthorityId":0, "latitude":40.6229402750001, "lengthOfLocks":0, "secondaryLengthOfLocks":null, "longitude":-82.3245162219999, "maxDischarge":19000, "maxStorage":87700, "nidHeight":113, "nidStorage":87700, "normalStorage":13500, "numberOfLocks":0, "operationalStatusDate":"2019-03-29T12:00:00.000Z", "operationalStatusId":2, "originalDesignerName":null, "otherStructureId":null, "permittingAuthorityId":0, "politicalPartyId":null, "privateDamId":null, "projectDescription":"Pleasant Hill Dam is located on the Clear Fork River, a tributary of the Mohican River. The dam is located approximately 2.5 miles south of Perrysville, Ohio. Completed by the United States Army Corps of Engineers (USACE) in 1938, the dam and its appurtenant structures are part of the Muskingum Watershed flood control system. The dam is a rolled earthen and rock structure with an impervious core. The main spillway is an uncontrolled \u201cmorning glory\u201d type, which consists of a large concrete funnel, transitioning into a 700 feet long tunnel which exits into a stilling basin at the toe of the dam. The stilling basin was designed to dissipate the energy of the flowing water from the tunnel, thereby reducing erosion. The auxiliary spillway and fuse plug are used to channel excess water away from the dam during high water events. The auxiliary spillway is an earthen channel that stretches 1,700 feet and releases into the Black Fork of the Mohican River. Across the opening of the spillway is a fuse plug composed primarily of clay that was completed in 2002. The fuse plug restricts water from flowing through the spillway until it is overtopped. The fuse plug will then erode and create access for the water to enter the spillway. The delay in spillway flow allows more time for emergency notification to the residents of Perrysville and other downstream communities in the case of flooding.", "riskCharSummary":"USACE currently identifies the risk associated with failure of the Pleasant Hill Dam as moderate to high. Erosion along the dam toe and left abutment are the main failures that could occur at Pleasant Hill Dam. In one area, the dam is founded on sand and gravel below a natural clay layer. In this area there has been some clear seepage of water under the dam. While this type of seepage is normal for dams in the area, USACE staff at the project are trained to observe for unusual flow and address them if found.\n\nIf an uncontrolled flood occurred, water would flood some low-lying portions of Perrysville from the auxiliary spillway. Additionally, Black Fork is a tributary of the Mohican River; therefore, failure of the spillway would further inundate towns downstream of the Pleasant Hill Dam. The town of Greer, Ohio is the closest town downstream of the dam, followed by Brinkhaven and Walhonding, Ohio. Perrysville would suffer the most immediate damage, while the other three would face later flooding as the Mohican River swells from the additional water of the spillway.\n\nIf uncontrolled flows occurred due to overtopping erosion of the dam, the town of Loudonville, located on Clear Fork of Mohican River about 2-3 miles from the confluence with Black Fork of the Mohican River (7 miles downstream of the dam), would be flooded due to backwater effects during this potential failure mode.", "riskManagementMeasures":"Pleasant Hill Dam is being well maintained with management addressing operational issues as part of the USACE\u2019s ongoing maintenance program. The spillway and dike were both found to be in good condition at the latest inspection. Furthermore, the dike should allow ample warning time for residents of Perrysville to evacuate in the case of flooding before water reaches the spillway. Finally, the auxiliary spillway is long enough so the likelihood of complete erosion is minimal, decreasing the likelihood of flooding to Perrysville. \nIn 2020, USACE developed an Interim Risk Reduction Measure plan for the Dam. This process reviewed all likely failure modes for Pleasant Hill Dam and made recommendations to reduce the consequences of a failure or overtopping. Among the recommendation are better emergency action plans, development of emergency exercises with local stakeholders as well as increased monitoring and inspections.", "riverName":"CLEAR FORK OF MOHICAN RIVER", "separateStructuresCount":1, "sourceAgency":"US Army Corps of Engineers", "spillwayTypeId":3, "spillwayWidth":19, "stateFedId":"OH00001", "stateRegulatoryAgency":null, "stateRegulatedId":0, "structuralHeight":113, "submitDate":"2023-06-02T15:14:36.501Z", "surfaceArea":2600, "volume":632200, "widthOfLocks":0, "secondaryWidthOfLocks":null, "yearCompleted":1937, "congDist":"Congressional District 04, Ohio", "city":"BRINKHAVEN", "county":"Ashland", "aiannh":null, "websiteUrl":"https://www.lrh.usace.army.mil/Missions/Civil-Works/Dam-Safety-Program/", "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":"CELRH", "otherNames":"Pleasant Hill Lake", "ownerNames":"USACE - Huntington District", "ownerTypeIds":"3", "primaryDamTypeId":8, "primaryOwnerTypeId":3, "primaryPurposeId":9, "purposeIds":"9;4;5", "dsacId":3, "femaRegion":"5", "lastEapExcerDate":"2024-07-25T12:00:00.000Z", "dataUpdated":"2025-06-24T12:00:00.000Z", "usaceDistrict":"Huntington District", "noConsequencesId":0, "secretaryAgricultureBuiltId":null, "nrcsWatershedAuthorizationId":null, "isAssociatedStructureId":"No", "fedRegulatedId":"Yes", "inundationNidAddedId":1, "damStatusId":2, "huc06":"050400", "doi_region":null, "doi_region_name":"Great Lakes", "doi_region_number":3, "thirtyYearAverage":17.8969, "tenthPercentile":16.6876, "ninetiethPercentile":20.0026 }, "id":568108, "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/568108?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/568108?f=jsonld" }, { "rel":"alternate", "type":"text/html", "title":"This document as HTML", "href":"https://api.wwdh.internetofwater.app/collections/usace-edr/items/568108?f=html" }, { "rel":"collection", "type":"application/json", "title":"USACE Access2Water API", "href":"https://api.wwdh.internetofwater.app/collections/usace-edr" } ] }