{ "bbox":null, "type":"Feature", "geometry":{ "bbox":null, "type":"Point", "coordinates":[ -79.5101, 40.71532 ] }, "properties":{ "provider":"LRP", "code":"CrookedCreek", "slug":"crookedcreek", "elevation":0.0, "horizontal_datum":"WGS84", "vertical_datum":"NAVD88", "state":"PA", "kind":"PROJECT", "nearest_city":"Harrison Township", "public_name":"Crooked Creek Lake", "location_code":16617111, "nsid":null, "aliases":{ "NIDID":"PA00102" }, "timeseries":[ { "tsid":"CrookedCreek-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":448.64, "delta24h":null, "sort_order":7, "results":null }, { "tsid":"CrookedCreek-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":4990.35, "delta24h":null, "sort_order":13, "results":null }, { "tsid":"CrookedCreek-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":"CrookedCreek-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":2.24, "delta24h":null, "sort_order":4, "results":null }, { "tsid":"CrookedCreek-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":4990.35, "delta24h":null, "sort_order":11, "results":null }, { "tsid":"CrookedCreek-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":2.24, "delta24h":null, "sort_order":5, "results":null }, { "tsid":"CrookedCreek-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":844.44, "delta24h":null, "sort_order":1, "results":null }, { "tsid":"CrookedCreek-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":146.42, "delta24h":null, "sort_order":6, "results":null } ], "name":"Crooked Creek Lake", "hasResopsAverages":"false", "nidId":"PA00102", "nidid":"", "levels":[ { "slug":"elev.minimum", "label":"Minimum", "parameter":"Elev", "base_parameter":"Elev", "tsid":"CrookedCreek.Elev.Inst.0.Minimum", "latest_value":837.43, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.streambed", "label":"Streambed", "parameter":"Elev", "base_parameter":"Elev", "tsid":"CrookedCreek.Elev.Inst.0.Streambed", "latest_value":800.4, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of conservation", "label":"Top of Conservation", "parameter":"Elev", "base_parameter":"Elev", "tsid":"CrookedCreek.Elev.Inst.0.Top of Conservation", "latest_value":837.43, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of dam", "label":"Top of Dam", "parameter":"Elev", "base_parameter":"Elev", "tsid":"CrookedCreek.Elev.Inst.0.Top of Dam", "latest_value":943.4, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of flood", "label":"Top of Flood", "parameter":"Elev", "base_parameter":"Elev", "tsid":"CrookedCreek.Elev.Inst.0.Top of Flood", "latest_value":917.43, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of full", "label":"Top of Full", "parameter":"Elev", "base_parameter":"Elev", "tsid":"CrookedCreek.Elev.Inst.0.Top of Full", "latest_value":917.43, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of inactive", "label":"Top of Inactive", "parameter":"Elev", "base_parameter":"Elev", "tsid":"CrookedCreek.Elev.Inst.0.Top of Inactive", "latest_value":837.43, "units":"ft", "units_long_name":"Feet" }, { "slug":"stor.minimum", "label":"Minimum", "parameter":"Stor", "base_parameter":"Stor", "tsid":"CrookedCreek.Stor.Inst.0.Minimum", "latest_value":2700, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.streambed", "label":"Streambed", "parameter":"Stor", "base_parameter":"Stor", "tsid":"CrookedCreek.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":"CrookedCreek.Stor.Inst.0.Top of Conservation", "latest_value":2700, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of dam", "label":"Top of Dam", "parameter":"Stor", "base_parameter":"Stor", "tsid":"CrookedCreek.Stor.Inst.0.Top of Dam", "latest_value":161362, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of flood", "label":"Top of Flood", "parameter":"Stor", "base_parameter":"Stor", "tsid":"CrookedCreek.Stor.Inst.0.Top of Flood", "latest_value":91050, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of full", "label":"Top of Full", "parameter":"Stor", "base_parameter":"Stor", "tsid":"CrookedCreek.Stor.Inst.0.Top of Full", "latest_value":91050, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of inactive", "label":"Top of Inactive", "parameter":"Stor", "base_parameter":"Stor", "tsid":"CrookedCreek.Stor.Inst.0.Top of Inactive", "latest_value":2700, "units":"ac-ft", "units_long_name":"Acre-feet" } ], "id":550090, "associatedStructuresCount":0, "conditionAssessDate":null, "conditionAssessDetail":null, "conditionAssessId":6, "damHeight":null, "damLength":1480, "distance":null, "drainageArea":277, "eapId":1, "dsacAssignedDate":"2017-07-12T12:00:00.000Z", "eapMeetsGuidelinesId":1, "emergencyContactsUpdated":"2024-10-25T12:00:00.000Z", "eapLastRevDate":null, "enforcementAuthorityId":0, "federalId":"PA00102", "oldFederalId":"PA00102", "hazardId":4, "hydraulicHeight":134, "inspectionAuthorityId":0, "inspectionDate":"2021-10-12T12:00:00.000Z", "inspectionFrequency":5, "jurisdictionAuthorityId":0, "latitude":40.715295586, "lengthOfLocks":0, "secondaryLengthOfLocks":null, "longitude":-79.5101886859999, "maxDischarge":103200, "maxStorage":132000, "nidHeight":143, "nidStorage":132000, "normalStorage":4500, "numberOfLocks":0, "operationalStatusDate":"2017-07-12T12:00:00.000Z", "operationalStatusId":1, "originalDesignerName":null, "otherStructureId":null, "permittingAuthorityId":0, "politicalPartyId":null, "privateDamId":null, "projectDescription":"The U.S. Army Corps of Engineers (USACE) constructed Crooked Creek Dam across Crooked Creek in Armstrong County in 1940 to hold back water during flood events to reduce the risk of downstream flooding in the low-lying communities in the lower Allegheny Valley including Kittanning, Ford City, the Pittsburgh metropolitan area. The dam forms the Crooked Creek Lake and is located about 7 miles upstream of the Allegheny River. The dam has reduced flood damage by more than an estimated $600 million, since the start of operations in 1940. The reservoir stores rainfall to maintain downstream flow within the downstream riverbanks, releases water after flood events and provides numerous opportunities for recreation. Crooked Creek Dam is composed of an earthen (embankment) dam which has a maximum height of 143 feet and a length of 1,490 feet. The reservoir levels are managed to approved levels throughout the year, normally by means of water releases through a tunnel that discharges water to the downstream Crooked Creek. In order to reduce the possibility that the reservoir will overtop the dam, a spillway (a concrete chute) was constructed to release a large volume of reservoir water away from the dam during significant rainfall events to reduce the possibility that water from the reservoir will overtop the dam.", "riskCharSummary":"The most recent risk assessment for Crooked Creek Dam was completed in 2017, which characterized the risk posed by the dam as low. The dam was well-constructed and is well-maintained. However, large populations live downstream of Crooked Creek Dam, including those in Kittanning, Ford City, the greater Pittsburgh Area, and other low-lying communities on the Allegheny river. 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 Crooked Creek Dam would be a high-volume release over the dam\u2019s spillway (which has never occurred since the dam began operations in 1940) 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.\nA less likely, but far more devastating flooding scenario exists: during an extreme rainfall event, high water levels in the reservoir could cause high water pressure within the embankment dam or its foundation. If this were to occur, the high-pressure water could erode the soils in the embankment dam or its foundation, which could lead to a breach of the dam. Although this scenario is very unlikely to occur, it is a possibility.\n\nIn either scenario, a large surge of water would flow out of the reservoir, flooding downstream communities. Communities, including Kittanning and Ford City, 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 communities in metropolitan Pittsburgh 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 levees (including those in Kittanning, New Kensington, and the Pittsburgh metropolitan area in Pennsylvania), 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 collective 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 Crooked Creek Lake is available to the public via the internet at: \n\nhttps://waterdata.usgs.gov/usa/nwis/uv?03038500", "riverName":"CROOKED CREEK", "separateStructuresCount":0, "sourceAgency":"US Army Corps of Engineers", "spillwayTypeId":3, "spillwayWidth":390, "stateFedId":"PA00102", "stateRegulatoryAgency":null, "stateRegulatedId":0, "structuralHeight":143, "submitDate":"2023-02-16T17:25:30.274Z", "surfaceArea":350, "volume":1400000, "widthOfLocks":0, "secondaryWidthOfLocks":null, "yearCompleted":1940, "congDist":"Congressional District 15, Pennsylvania", "city":"FORD CITY", "county":"Armstrong", "aiannh":null, "websiteUrl":"https://www.usace.army.mil/Missions/Civil-Works/Dam-Safety-Program/Article/2870967/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":"CELRP", "otherNames":"Crooked Creek Lake", "ownerNames":"USACE - Pittsburgh District", "ownerTypeIds":"3", "primaryDamTypeId":8, "primaryOwnerTypeId":3, "primaryPurposeId":9, "purposeIds":"9;5", "dsacId":4, "femaRegion":"3", "lastEapExcerDate":"2025-03-20T12:00:00.000Z", "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":16617111, "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/16617111?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/16617111?f=jsonld" }, { "rel":"alternate", "type":"text/html", "title":"This document as HTML", "href":"https://api.wwdh.internetofwater.app/collections/usace-edr/items/16617111?f=html" }, { "rel":"collection", "type":"application/json", "title":"USACE Access2Water API", "href":"https://api.wwdh.internetofwater.app/collections/usace-edr" } ] }