{ "bbox":null, "type":"Feature", "geometry":{ "bbox":null, "type":"Point", "coordinates":[ -81.2175, 40.1922 ] }, "properties":{ "provider":"LRH", "code":"Piedmont", "slug":"piedmont", "elevation":881.75, "horizontal_datum":"WGS84", "vertical_datum":"NGVD29", "state":"OH", "kind":"PROJECT", "nearest_city":"Piedmont", "public_name":"Piedmont Lake", "location_code":565108, "nsid":null, "aliases":{ "Local Loc ID":"PES", "NIDID":"OH00011" }, "timeseries":[ { "tsid":"Piedmont-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":35944.5, "delta24h":null, "sort_order":13, "results":null }, { "tsid":"Piedmont-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":913.0, "delta24h":null, "sort_order":2, "results":null }, { "tsid":"Piedmont-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":293.05, "delta24h":null, "sort_order":7, "results":null }, { "tsid":"Piedmont-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":35944.5, "delta24h":null, "sort_order":11, "results":null }, { "tsid":"Piedmont-Outflow.Stage.Inst.15Minutes.0.OBS", "label":"Stage Tailwater", "base_parameter":"Stage", "parameter":"Stage", "unit":"ft", "unit_long_name":"Feet", "latest_time":"2026-04-14T22:15:00Z", "latest_value":3.42, "delta24h":null, "sort_order":5, "results":null }, { "tsid":"Piedmont-Outflow.Precip.Inst.15Minutes.0.OBS", "label":"Precipitation", "base_parameter":"Precip", "parameter":"Precip", "unit":"in", "unit_long_name":"Inches", "latest_time":"2026-04-14T22:15:00Z", "latest_value":10.82, "delta24h":null, "sort_order":16, "results":null }, { "tsid":"Piedmont-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":198.07, "delta24h":null, "sort_order":6, "results":null }, { "tsid":"Piedmont-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":913.61, "delta24h":null, "sort_order":1, "results":null } ], "name":"Piedmont Lake", "hasResopsAverages":"true", "nidId":"OH00011", "nidid":"", "levels":[ { "slug":"elev.bottom of conservation", "label":"Bottom of Conservation", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Piedmont.Elev.Inst.0.Bottom of Conservation", "latest_value":881.75, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.bottom of flood", "label":"Bottom of Flood", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Piedmont.Elev.Inst.0.Bottom of Flood", "latest_value":913, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.streambed", "label":"Streambed", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Piedmont.Elev.Inst.0.Streambed", "latest_value":878.01, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of conservation", "label":"Top of Conservation", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Piedmont.Elev.Inst.0.Top of Conservation", "latest_value":913, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of dam", "label":"Top of Dam", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Piedmont.Elev.Inst.0.Top of Dam", "latest_value":937.6, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of flood", "label":"Top of Flood", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Piedmont.Elev.Inst.0.Top of Flood", "latest_value":924.6, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of flood threat", "label":"Top of Flood Threat", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Piedmont.Elev.Inst.0.Top of Flood Threat", "latest_value":919, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of inactive", "label":"Top of Inactive", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Piedmont.Elev.Inst.0.Top of Inactive", "latest_value":881.75, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of minimum", "label":"Top of Minimum", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Piedmont.Elev.Inst.0.Top of Minimum", "latest_value":908, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of normal", "label":"Top of Normal", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Piedmont.Elev.Inst.0.Top of Normal", "latest_value":913, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of record", "label":"Top of Record", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Piedmont.Elev.Inst.0.Top of Record", "latest_value":921.56, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of recreation", "label":"Top of Recreation", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Piedmont.Elev.Inst.0.Top of Recreation", "latest_value":913, "units":"ft", "units_long_name":"Feet" }, { "slug":"stor.bottom of flood", "label":"Bottom of Flood", "parameter":"Stor", "base_parameter":"Stor", "tsid":"Piedmont.Stor.Inst.0.Bottom of Flood", "latest_value":34511, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of conservation", "label":"Top of Conservation", "parameter":"Stor", "base_parameter":"Stor", "tsid":"Piedmont.Stor.Inst.0.Top of Conservation", "latest_value":34510, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of dam", "label":"Top of Dam", "parameter":"Stor", "base_parameter":"Stor", "tsid":"Piedmont.Stor.Inst.0.Top of Dam", "latest_value":120149, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of flood", "label":"Top of Flood", "parameter":"Stor", "base_parameter":"Stor", "tsid":"Piedmont.Stor.Inst.0.Top of Flood", "latest_value":66750, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of inactive", "label":"Top of Inactive", "parameter":"Stor", "base_parameter":"Stor", "tsid":"Piedmont.Stor.Inst.0.Top of Inactive", "latest_value":38, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of minimum", "label":"Top of Minimum", "parameter":"Stor", "base_parameter":"Stor", "tsid":"Piedmont.Stor.Inst.0.Top of Minimum", "latest_value":23953, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of normal", "label":"Top of Normal", "parameter":"Stor", "base_parameter":"Stor", "tsid":"Piedmont.Stor.Inst.0.Top of Normal", "latest_value":34511, "units":"ac-ft", "units_long_name":"Acre-feet" } ], "id":550246, "associatedStructuresCount":0, "conditionAssessDate":null, "conditionAssessDetail":null, "conditionAssessId":6, "damHeight":null, "damLength":1750, "distance":4, "drainageArea":86, "eapId":1, "dsacAssignedDate":"2020-03-12T12:00:00.000Z", "eapMeetsGuidelinesId":1, "emergencyContactsUpdated":"2024-07-25T12:00:00.000Z", "eapLastRevDate":"2011-07-06T12:00:00.000Z", "enforcementAuthorityId":0, "federalId":"OH00011", "oldFederalId":"OH00011", "hazardId":4, "hydraulicHeight":45, "inspectionAuthorityId":0, "inspectionDate":"2024-04-19T12:00:00.000Z", "inspectionFrequency":5, "jurisdictionAuthorityId":0, "latitude":40.1900653750001, "lengthOfLocks":0, "secondaryLengthOfLocks":null, "longitude":-81.213020017, "maxDischarge":15200, "maxStorage":66700, "nidHeight":56, "nidStorage":66700, "normalStorage":34500, "numberOfLocks":0, "operationalStatusDate":"2020-03-12T12:00:00.000Z", "operationalStatusId":1, "originalDesignerName":null, "otherStructureId":null, "permittingAuthorityId":0, "politicalPartyId":null, "privateDamId":null, "projectDescription":"The U.S. Army Corps of Engineers (USACE) operates and maintains more than 700 dams across the United States. A dam is an earthen embankment and/or solid concrete structure that is built across a river, stream, or other waterway to temporarily hold back and store water that would otherwise flow downstream. More detail related to this specific dam will be added at a future time.", "riskCharSummary":"Piedmont dam significantly reduces the risk of flooding to surrounding communities. However, it does not entirely eliminate risk. Although the dam has historically performed well, extreme rain events may cause areas downstream and leveed areas to be flooded. Even when the dam operates as intended, downstream flooding could still occur in a very large rainfall event. This event could require unusually large quantities of water to be released through the dam gates and emergency spillway. In extreme cases, this flooding could be similar to what was experienced prior to the dam\u2019s construction.\n\nThe U.S. Army Corps of Engineers completed a risk assessment for Piedmont Dam in 2020 and classified the risk associated with failure as low. This risk categorization is based on the risk of rare storm events occurring which would cause more rainfall than the dam can store safely. During such an event, the spillways have the potential to pass over 20,000 cubic feet of water per second. The operation of the spillway would be necessary to prevent the dam from overtopping and potentially breaching.\n\nWhile the Piedmont Dam spillway has never seen flow, if operated it could result in significant flooding in downstream communities. Depending on the amount of water released, significant damages to houses, buildings, factories, roads, bridges, power, gas, and water supply may occur. Critical infrastructure, including roadways (evacuation routes) and bridges may not be passable due to high flood waters during spillway flows. \n\nWhile rare events like these have not occurred to date, if they were to happen, water is likely to reach hillside to hillside quickly and be more than tens of feet deep depending on the location. In the unlikely event Piedmont Dam must pass these extreme waters, follow all directions from emergency officials, including evacuation orders. Failure to do so puts you and your family\u2019s lives at risk.", "riskManagementMeasures":"There are numerous activities that U.S. Army Corps of Engineers conducts on a day-to-day basis to help manage risk at Piedmont Dam. The project is well maintained through continuous operations and maintenance activities, and U.S. Army Corps of Engineers conducts detailed inspections of the dam during both normal lake levels and during flood events. Supplementing these inspections, the dam has a specialized instrumentation and monitoring system to allow staff to continually evaluate the dam for changing conditions. Risk management and emergency response actions are being supported by conducting emergency exercises and dam safety training with U.S. Army Corps of Engineers staff and local and state emergency responders. Additionally, the dam\u2019s Emergency Action Plan is routinely updated to improve emergency response actions.", "riverName":"STILLWATER CREEK", "separateStructuresCount":0, "sourceAgency":"US Army Corps of Engineers", "spillwayTypeId":3, "spillwayWidth":130, "stateFedId":"OH00011", "stateRegulatoryAgency":null, "stateRegulatedId":0, "structuralHeight":56, "submitDate":"2023-02-28T16:56:29.799Z", "surfaceArea":2312, "volume":642900, "widthOfLocks":0, "secondaryWidthOfLocks":null, "yearCompleted":1937, "congDist":"Congressional District 06, Ohio", "city":"FREEPORT", "county":"Harrison", "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":"3", "nonFederalDamOnFederalId":0, "designerNames":"CELRH", "otherNames":"Piedmont Lake", "ownerNames":"USACE - Huntington District", "ownerTypeIds":"3", "primaryDamTypeId":8, "primaryOwnerTypeId":3, "primaryPurposeId":9, "purposeIds":"9;4;5", "dsacId":4, "femaRegion":"5", "lastEapExcerDate":"2024-07-25T12:00:00.000Z", "dataUpdated":"2025-06-16T16:49:03.484Z", "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":43.8783, "tenthPercentile":42.4696, "ninetiethPercentile":47.0134 }, "id":565108, "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/565108?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/565108?f=jsonld" }, { "rel":"alternate", "type":"text/html", "title":"This document as HTML", "href":"https://api.wwdh.internetofwater.app/collections/usace-edr/items/565108?f=html" }, { "rel":"collection", "type":"application/json", "title":"USACE Access2Water API", "href":"https://api.wwdh.internetofwater.app/collections/usace-edr" } ] }