{ "bbox":null, "type":"Feature", "geometry":{ "bbox":null, "type":"Point", "coordinates":[ -80.46222, 41.26453 ] }, "properties":{ "provider":"LRP", "code":"Shenango", "slug":"shenango", "elevation":0.0, "horizontal_datum":"WGS84", "vertical_datum":"NAVD88", "state":"PA", "kind":"PROJECT", "nearest_city":"Sharon", "public_name":"Shenango River Lake", "location_code":16766111, "nsid":null, "aliases":{ "NIDID":"PA00111" }, "timeseries":[ { "tsid":"Shenango-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":0.01, "delta24h":null, "sort_order":16, "results":null }, { "tsid":"Shenango-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":841.83, "delta24h":null, "sort_order":6, "results":null }, { "tsid":"Shenango-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":41592.43, "delta24h":null, "sort_order":11, "results":null }, { "tsid":"Shenango-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":41592.43, "delta24h":null, "sort_order":13, "results":null }, { "tsid":"Shenango-Outflow.Flow.Inst.1Hour.0.OBS", "label":"Outflow", "base_parameter":"Flow", "parameter":"Flow", "unit":"cfs", "unit_long_name":"Cubic feet per second", "latest_time":"2026-04-14T21:00:00Z", "latest_value":997.55, "delta24h":null, "sort_order":7, "results":null }, { "tsid":"Shenango-Outflow.Stage.Inst.1Hour.0.OBS", "label":"Stage Tailwater", "base_parameter":"Stage", "parameter":"Stage", "unit":"ft", "unit_long_name":"Feet", "latest_time":"2026-04-14T21:00:00Z", "latest_value":3.72, "delta24h":null, "sort_order":5, "results":null }, { "tsid":"Shenango-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":894.84, "delta24h":null, "sort_order":1, "results":null }, { "tsid":"Shenango-Outflow.Stage.Inst.1Hour.0.OBS", "label":"Stage", "base_parameter":"Stage", "parameter":"Stage", "unit":"ft", "unit_long_name":"Feet", "latest_time":"2026-04-14T21:00:00Z", "latest_value":3.72, "delta24h":null, "sort_order":4, "results":null } ], "name":"Shenango River Lake", "hasResopsAverages":"false", "nidId":"PA00111", "nidid":"", "levels":[ { "slug":"elev.minimum", "label":"Minimum", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Shenango.Elev.Inst.0.Minimum", "latest_value":883.68, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.streambed", "label":"Streambed", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Shenango.Elev.Inst.0.Streambed", "latest_value":864.7, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of conservation", "label":"Top of Conservation", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Shenango.Elev.Inst.0.Top of Conservation", "latest_value":893.72, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of dam", "label":"Top of Dam", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Shenango.Elev.Inst.0.Top of Dam", "latest_value":932.4, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of flood", "label":"Top of Flood", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Shenango.Elev.Inst.0.Top of Flood", "latest_value":917.67, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of full", "label":"Top of Full", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Shenango.Elev.Inst.0.Top of Full", "latest_value":917.67, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of inactive", "label":"Top of Inactive", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Shenango.Elev.Inst.0.Top of Inactive", "latest_value":883.68, "units":"ft", "units_long_name":"Feet" }, { "slug":"stor.minimum", "label":"Minimum", "parameter":"Stor", "base_parameter":"Stor", "tsid":"Shenango.Stor.Inst.0.Minimum", "latest_value":11100, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.streambed", "label":"Streambed", "parameter":"Stor", "base_parameter":"Stor", "tsid":"Shenango.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":"Shenango.Stor.Inst.0.Top of Conservation", "latest_value":37680.79, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of dam", "label":"Top of Dam", "parameter":"Stor", "base_parameter":"Stor", "tsid":"Shenango.Stor.Inst.0.Top of Dam", "latest_value":371625, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of flood", "label":"Top of Flood", "parameter":"Stor", "base_parameter":"Stor", "tsid":"Shenango.Stor.Inst.0.Top of Flood", "latest_value":191400, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of full", "label":"Top of Full", "parameter":"Stor", "base_parameter":"Stor", "tsid":"Shenango.Stor.Inst.0.Top of Full", "latest_value":191400, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of inactive", "label":"Top of Inactive", "parameter":"Stor", "base_parameter":"Stor", "tsid":"Shenango.Stor.Inst.0.Top of Inactive", "latest_value":11100, "units":"ac-ft", "units_long_name":"Acre-feet" } ], "id":549993, "associatedStructuresCount":0, "conditionAssessDate":null, "conditionAssessDetail":null, "conditionAssessId":6, "damHeight":null, "damLength":720, "distance":1, "drainageArea":589, "eapId":1, "dsacAssignedDate":"2023-06-12T12:00:00.000Z", "eapMeetsGuidelinesId":1, "emergencyContactsUpdated":"2024-10-25T12:00:00.000Z", "eapLastRevDate":null, "enforcementAuthorityId":0, "federalId":"PA00111", "oldFederalId":"PA00111", "hazardId":4, "hydraulicHeight":64, "inspectionAuthorityId":0, "inspectionDate":"2022-10-27T12:00:00.000Z", "inspectionFrequency":5, "jurisdictionAuthorityId":0, "latitude":41.2644209650001, "lengthOfLocks":0, "secondaryLengthOfLocks":null, "longitude":-80.462183978, "maxDischarge":64000, "maxStorage":351000, "nidHeight":68, "nidStorage":351000, "normalStorage":29920, "numberOfLocks":0, "operationalStatusDate":"2023-06-12T12:00:00.000Z", "operationalStatusId":1, "originalDesignerName":null, "otherStructureId":null, "permittingAuthorityId":0, "politicalPartyId":null, "privateDamId":null, "projectDescription":"The U.S. Army Corps of Engineers (USACE) completed construction of the Shenango Dam across the Shenango River in 1965 to hold back water during flood events to reduce the risk of downstream flooding in the low-lying communities in the Shenango and Beaver River valleys, including Sharpsville, Sharon, and New Castle, Pennsylvania. The dam forms the Shenango River Lake and is located about 34 miles upstream of the confluence of the Shenango River and the Mahoning River which form the Beaver River, a tributary to the Ohio River. Shenango Dam has reduced flood damage by more than an estimated $250 million since the start of operations. The reservoir stores rainfall to maintain downstream flow within the downstream riverbanks, releases water after flood events and provides numerous opportunities for recreation. Shenango Dam is a concrete dam and has a maximum height of about 68 feet and a length of about 720 feet. The dam has a 300-foot-long spillway, 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. Immediately downstream of the dam, the riverbed is lined with concrete slabs (stilling basin) that are intended to prevent erosion of the riverbed when water is flowing over the dam\u2019s spillway. The reservoir also serves to store rainfall and melted snow during the spring months and releases water to the river in the drier autumn months.", "riskCharSummary":"The most recent risk assessment for Shenango Dam was completed in 2022, which characterized the risk posed by the dam as very low. The dam was well-constructed and is well-maintained. However, significant populations live downstream of Shenango Dam, including those in Sharpsville, Sharon, and New Castle and other low-lying communities on the Shenango and Beaver 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 Shenango Dam would be a high-volume release over the dam\u2019s spillway (which has never experienced flow since the project was put into full operation in 1965) 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\nThere are three less likely, but far more devastating scenarios that would produce significant flooding during an already extreme rainfall event: 1) Water flowing over the spillway could lift sections of the concrete stilling basin floor, leading to erosion of the riverbed that results in downstream movement of a portion of the concrete dam; 2) Horizontal leakage through the concrete dam results in a portion of the concrete dam sliding downstream; 3) The reservoir rises above the top of the dam; water flowing over them dam erodes the ground downstream of the dam, resulting in a portion of the concrete dam moving downstream. Each of these scenarios would result in breach of the dam with some or all or some of the water in the reservoir swiftly flowing into the downstream Shenango River. Although these scenarios are very unlikely, they are possible.\n\nIn any of these scenarios, a large surge of water would flow out of the reservoir, flooding downstream communities. Communities, including Sharpsville and Sharon, 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 New Castle, possibly have less awareness of the dam but will have more warning. \n\nWith any of the scenarios described above, the downstream floodwater would be swift and deep, possibly overflowing banks on the Shenango and Beaver Rivers, and destroying buildings and infrastructure. Anyone caught unaware and/or unable to evacuate could perish. In the less likely dam breach scenarios, 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 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 lake levels at the Shenango River Lake is available to the public via the internet at: \n\nhttps://waterdata.usgs.gov/monitoring-location/03103400/#dataTypeId=continuous-00045-0&period=P7D&showMedian=true", "riverName":"SHENANGO RIVER", "separateStructuresCount":0, "sourceAgency":"US Army Corps of Engineers", "spillwayTypeId":3, "spillwayWidth":300, "stateFedId":"PA00111", "stateRegulatoryAgency":null, "stateRegulatedId":0, "structuralHeight":68, "submitDate":"2023-02-16T17:25:16.059Z", "surfaceArea":3560, "volume":65800, "widthOfLocks":0, "secondaryWidthOfLocks":null, "yearCompleted":1965, "congDist":"Congressional District 16, Pennsylvania", "city":"SHARPSVILLE", "county":"Mercer", "aiannh":null, "websiteUrl":"https://www.usace.army.mil/Missions/Civil-Works/Dam-Safety-Program/Article/2870967/dam-safety-program/", "coreTypeIds":"2", "damTypeIds":"9", "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":"Shenango River Lake", "ownerNames":"USACE - Pittsburgh District", "ownerTypeIds":"3", "primaryDamTypeId":9, "primaryOwnerTypeId":3, "primaryPurposeId":9, "purposeIds":"9;12", "dsacId":5, "femaRegion":"3", "lastEapExcerDate":"2025-04-10T12:00:00.000Z", "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":"050301", "doi_region":null, "doi_region_name":"North Atlantic-Appalachian", "doi_region_number":1 }, "id":16766111, "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/16766111?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/16766111?f=jsonld" }, { "rel":"alternate", "type":"text/html", "title":"This document as HTML", "href":"https://api.wwdh.internetofwater.app/collections/usace-edr/items/16766111?f=html" }, { "rel":"collection", "type":"application/json", "title":"USACE Access2Water API", "href":"https://api.wwdh.internetofwater.app/collections/usace-edr" } ] }