{ "bbox":null, "type":"Feature", "geometry":{ "bbox":null, "type":"Point", "coordinates":[ -79.3661, 40.46816 ] }, "properties":{ "provider":"LRP", "code":"Conemaugh", "slug":"conemaugh", "elevation":0.0, "horizontal_datum":"WGS84", "vertical_datum":"NAVD88", "state":"PA", "kind":"PROJECT", "nearest_city":"Indiana", "public_name":"Conemaugh River Lake", "location_code":16920111, "nsid":null, "aliases":{ "NIDID":"PA00101" }, "timeseries":[ { "tsid":"Conemaugh-Lake.Precip-Inc.Total.1Hour.1Hour.OBS", "label":"Precipitation", "base_parameter":"Precip", "parameter":"Precip-Inc", "unit":"in", "unit_long_name":"Inches", "latest_time":"2026-04-14T21:00:00Z", "latest_value":0.0, "delta24h":null, "sort_order":16, "results":null }, { "tsid":"Conemaugh-Lake.Stor.Inst.1Hour.0.OBS", "label":"Conservation Storage", "base_parameter":"Stor", "parameter":"Stor", "unit":"ac-ft", "unit_long_name":"Acre-feet", "latest_time":"2026-04-14T21:00:00Z", "latest_value":7118.73, "delta24h":null, "sort_order":13, "results":null }, { "tsid":"Conemaugh-Outflow.Flow.Inst.1Hour.0.OBS", "label":"Outflow", "base_parameter":"Flow", "parameter":"Flow", "unit":"cfs", "unit_long_name":"Cubic feet per second", "latest_time":"2026-04-14T22:00:00Z", "latest_value":2201.31, "delta24h":null, "sort_order":7, "results":null }, { "tsid":"Conemaugh-Lake.Elev.Inst.1Hour.0.OBS", "label":"Elevation", "base_parameter":"Elev", "parameter":"Elev", "unit":"ft", "unit_long_name":"Feet", "latest_time":"2026-04-14T21:00:00Z", "latest_value":907.75, "delta24h":null, "sort_order":1, "results":null }, { "tsid":"Conemaugh-Lake.Stor.Inst.1Hour.0.OBS", "label":"Flood Storage", "base_parameter":"Stor", "parameter":"Stor", "unit":"ac-ft", "unit_long_name":"Acre-feet", "latest_time":"2026-04-14T21:00:00Z", "latest_value":7118.73, "delta24h":null, "sort_order":11, "results":null }, { "tsid":"Conemaugh-Outflow.Stage.Inst.1Hour.0.OBS", "label":"Stage Tailwater", "base_parameter":"Stage", "parameter":"Stage", "unit":"ft", "unit_long_name":"Feet", "latest_time":"2026-04-14T22:00:00Z", "latest_value":4.27, "delta24h":null, "sort_order":5, "results":null }, { "tsid":"Conemaugh-Outflow.Stage.Inst.1Hour.0.OBS", "label":"Stage", "base_parameter":"Stage", "parameter":"Stage", "unit":"ft", "unit_long_name":"Feet", "latest_time":"2026-04-14T22:00:00Z", "latest_value":4.27, "delta24h":null, "sort_order":4, "results":null }, { "tsid":"Conemaugh-Lake.Flow-Inflow-Comp.Inst.1Hour.0.A2W", "label":"Inflow", "base_parameter":"Flow", "parameter":"Flow-Inflow-Comp", "unit":"cfs", "unit_long_name":"Cubic feet per second", "latest_time":"2026-04-14T18:00:00Z", "latest_value":1759.05, "delta24h":null, "sort_order":6, "results":null } ], "name":"Conemaugh River Lake", "hasResopsAverages":"false", "nidId":"PA00101", "nidid":"", "levels":[ { "slug":"elev.minimum", "label":"Minimum", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Conemaugh.Elev.Inst.0.Minimum", "latest_value":899.22, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.streambed", "label":"Streambed", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Conemaugh.Elev.Inst.0.Streambed", "latest_value":848.8, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of conservation", "label":"Top of Conservation", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Conemaugh.Elev.Inst.0.Top of Conservation", "latest_value":899.22, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of dam", "label":"Top of Dam", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Conemaugh.Elev.Inst.0.Top of Dam", "latest_value":985.8, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of flood", "label":"Top of Flood", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Conemaugh.Elev.Inst.0.Top of Flood", "latest_value":974.22, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of full", "label":"Top of Full", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Conemaugh.Elev.Inst.0.Top of Full", "latest_value":974.22, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of inactive", "label":"Top of Inactive", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Conemaugh.Elev.Inst.0.Top of Inactive", "latest_value":899.22, "units":"ft", "units_long_name":"Feet" }, { "slug":"stor.minimum", "label":"Minimum", "parameter":"Stor", "base_parameter":"Stor", "tsid":"Conemaugh.Stor.Inst.0.Minimum", "latest_value":2385, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.streambed", "label":"Streambed", "parameter":"Stor", "base_parameter":"Stor", "tsid":"Conemaugh.Stor.Inst.0.Streambed", "latest_value":0, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of conservation", "label":"Top of Conservation", "parameter":"Stor", "base_parameter":"Stor", "tsid":"Conemaugh.Stor.Inst.0.Top of Conservation", "latest_value":2385, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of dam", "label":"Top of Dam", "parameter":"Stor", "base_parameter":"Stor", "tsid":"Conemaugh.Stor.Inst.0.Top of Dam", "latest_value":334895, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of flood", "label":"Top of Flood", "parameter":"Stor", "base_parameter":"Stor", "tsid":"Conemaugh.Stor.Inst.0.Top of Flood", "latest_value":248555, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of full", "label":"Top of Full", "parameter":"Stor", "base_parameter":"Stor", "tsid":"Conemaugh.Stor.Inst.0.Top of Full", "latest_value":248555, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of inactive", "label":"Top of Inactive", "parameter":"Stor", "base_parameter":"Stor", "tsid":"Conemaugh.Stor.Inst.0.Top of Inactive", "latest_value":2385, "units":"ac-ft", "units_long_name":"Acre-feet" } ], "id":550089, "associatedStructuresCount":0, "conditionAssessDate":null, "conditionAssessDetail":null, "conditionAssessId":6, "damHeight":null, "damLength":1266, "distance":null, "drainageArea":1351, "eapId":1, "dsacAssignedDate":"2021-12-02T12:00:00.000Z", "eapMeetsGuidelinesId":1, "emergencyContactsUpdated":"2024-10-25T12:00:00.000Z", "eapLastRevDate":null, "enforcementAuthorityId":0, "federalId":"PA00101", "oldFederalId":"PA00101", "hazardId":4, "hydraulicHeight":136, "inspectionAuthorityId":0, "inspectionDate":"2022-05-06T12:00:00.000Z", "inspectionFrequency":5, "jurisdictionAuthorityId":0, "latitude":40.4681111100001, "lengthOfLocks":0, "secondaryLengthOfLocks":null, "longitude":-79.366266616, "maxDischarge":354000, "maxStorage":355000, "nidHeight":144, "nidStorage":355000, "normalStorage":5140, "numberOfLocks":0, "operationalStatusDate":"2021-12-02T12:00:00.000Z", "operationalStatusId":2, "originalDesignerName":null, "otherStructureId":null, "permittingAuthorityId":0, "politicalPartyId":null, "privateDamId":null, "projectDescription":"The U.S. Army Corps of Engineers (USACE) constructed Conemaugh Dam across the Conemaugh River in 1953 to hold back water during flood events to reduce the risk of downstream flooding in the low-lying communities on the lower Conemaugh Valley, the Kiskiminetas Valley, the lower Allegheny Valley, and the Upper Ohio Valley, including Saltsburg, Apollo, Vandergrift, Leechburg, Tarentum, the greater Pittsburgh area, and additional towns on the Monongahela and Ohio Rivers in Pennsylvania, West Virginia and Ohio. The dam is located about eight miles upstream of Saltsburg, Pennsylvania and forms the Conemaugh River Lake. Conemaugh Dam has reduced flood damage by more than an estimated $2.5 billion since the start of operations. The reservoir stores rainfall to maintain downstream flow within the downstream river banks and releases water after flood events; provides water to a hydropower facility; and provides numerous opportunities for recreation. Conemaugh Dam is composed of both a concrete portion and an earthen (embankment) portion and has a maximum height of 157 feet and a length of about 1200 feet. The concrete portion of the dam has spillway gates designed to release a large volume of water during significant rainfall events to reduce the possibility that water from the reservoir will overtop the dam.", "riskCharSummary":"The most recent risk assessment for Conemaugh was completed in 2020, which characterized the risk posed by the dam as moderate urgency of action. The dam was well-constructed and is well-maintained. However, large populations live downstream of Conemaugh Dam, including those in Saltsburg, Apollo, Vandergrift, Leechburg, Tarentum, the greater Pittsburgh Area, and other low-lying communities on the Allegheny, Monongahela, and Ohio rivers. Although the dam reduces the risk of flooding to these communities, it does not eliminate flooding. The most likely scenario resulting in downstream flooding from Conemaugh Dam would be a high-volume release over the dam\u2019s spillway (which has never been operated at full capacity since the project was put into full operation in 1953) during an unusually large and intense storm event. Water released over the spillway could create conditions similar to how the river would behave if the dam had not been constructed. \n\nA less likely, but far more devastating flooding scenario exists: an extreme rainfall event that results in water flowing over the earthen embankment portion of the dam, eroding the embankment, and leading to a breach. Although such a precipitation event leading to a breach is extremely rare, it is a possibility.\n\nIn either scenario, a large surge of water would flow out of the reservoir, flooding downstream communities. Communities, including Saltsburg, that are closer to the dam, are in more immediate danger of a significant flood event and may have little advanced warning. Cities and communities further downstream of the dam, such as Apollo, Vandergrift, Leechburg, Tarentum, communities in metropolitan Pittsburgh, and communities on the Ohio River have larger populations and possibly less awareness of the dam but will have more warning. \n\nWith either of the scenarios described above, the downstream floodwater would be swift and deep, possibly overflowing banks on the Allegheny, Monongahela, and Ohio Rivers; the Tarentum floodwall; the Braeburn Dike (near Tarentum); and the Wellsburg, WV levee, destroying buildings and infrastructure. Anyone caught unaware and/or unable to evacuate could perish. In the less likely dam breach scenario, the water depth, property damage, and lives lost would likely be far greater.", "riskManagementMeasures":"USACE will continue to work closely with state and local emergency managers, conduct emergency exercises and incorporate any new information into our emergency action plans. We will study whether there are additional measures that we can take to reduce the risk associated with high reservoir levels overflowing onto the earthen portion of the dam. We will continue rigorous monitoring and surveillance of the dam and will do so more frequently during high-water events. Rainfall forecasts and reservoir levels are routinely monitored and if a high-water event is forecast, we will promptly inform local and state emergency managers so that they can take protective actions, make flood warnings, and prepare for emergency responses. We will work with local communities to provide opportunities to engage with residents to help them understand how they can better prepare for a potential flood. In partnership with the US Geologic Survey and the National Weather Service, information on current and forecasted lake levels at Pittsburgh District reservoirs are available to the public via the internet at: \n\nhttps://www.lrp.usace.army.mil/Portals/72/docs/WaterManagement/ResSumPlots.pdf.", "riverName":"CONEMAUGH RIVER", "separateStructuresCount":0, "sourceAgency":"US Army Corps of Engineers", "spillwayTypeId":1, "spillwayWidth":420, "stateFedId":"PA00101", "stateRegulatoryAgency":null, "stateRegulatedId":0, "structuralHeight":144, "submitDate":"2023-02-16T17:25:39.374Z", "surfaceArea":800, "volume":352000, "widthOfLocks":0, "secondaryWidthOfLocks":null, "yearCompleted":1952, "congDist":"Congressional District 14, Pennsylvania", "city":"SALTSBURG", "county":"Westmoreland", "aiannh":null, "websiteUrl":"https://www.usace.army.mil/Missions/Civil-Works/Dam-Safety-Program/Article/2870967/dam-safety-program/", "coreTypeIds":"2", "damTypeIds":"9;8", "fedConstructionIds":"1", "fedDesignIds":"1", "fedFundingIds":"1", "fedInspectionIds":"1", "fedOperationIds":"1", "fedOtherIds":"1", "fedOwnerIds":"1", "fedRegulatoryIds":"1", "formerNames":null, "foundationTypeIds":"1", "nonFederalDamOnFederalId":0, "designerNames":"CELRP", "otherNames":"Conemaugh River Lake", "ownerNames":"USACE - Pittsburgh District", "ownerTypeIds":"3", "primaryDamTypeId":9, "primaryOwnerTypeId":3, "primaryPurposeId":9, "purposeIds":"9;12;5;6", "dsacId":3, "femaRegion":"3", "lastEapExcerDate":"2024-11-14T12:00:00.000Z", "dataUpdated":"2025-05-29T12:00:00.000Z", "usaceDistrict":"Pittsburgh District", "noConsequencesId":0, "secretaryAgricultureBuiltId":null, "nrcsWatershedAuthorizationId":null, "isAssociatedStructureId":"No", "fedRegulatedId":"Yes", "inundationNidAddedId":1, "damStatusId":2, "huc06":"050100", "doi_region":null, "doi_region_name":"North Atlantic-Appalachian", "doi_region_number":1 }, "id":16920111, "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/16920111?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/16920111?f=jsonld" }, { "rel":"alternate", "type":"text/html", "title":"This document as HTML", "href":"https://api.wwdh.internetofwater.app/collections/usace-edr/items/16920111?f=html" }, { "rel":"collection", "type":"application/json", "title":"USACE Access2Water API", "href":"https://api.wwdh.internetofwater.app/collections/usace-edr" } ] }