{ "bbox":null, "type":"Feature", "geometry":{ "bbox":null, "type":"Point", "coordinates":[ -77.15091, 41.98355 ] }, "properties":{ "provider":"NAB", "code":"Cowanesque", "slug":"cowanesque", "elevation":1000.0, "horizontal_datum":"WGS84", "vertical_datum":"LOCAL", "state":"PA", "kind":"PROJECT", "nearest_city":"Lawrenceville", "public_name":"Cowanesque Lake", "location_code":300020, "nsid":null, "aliases":{ "NIDID":"PA01134", "CBT Station ID":"ctp", "SHEF Location ID":"COWP1", "DCP Platform ID":"CE5995AE", "USGS Station Number":"01519995", "CWMS Legacy Naming":"Cowanesque", "CWMS Standard Naming":"Cowanesque" }, "timeseries":[ { "tsid":"Cowanesque.%-FloodControl.Inst.15Minutes.0.Best-NAB-Computed", "label":"Percent Flood Pool", "base_parameter":"%", "parameter":"%-FloodControl", "unit":"%", "unit_long_name":"Percent", "latest_time":"2026-04-14T13:00:00Z", "latest_value":2.03, "delta24h":null, "sort_order":12, "results":null }, { "tsid":"Cowanesque.Flow-Out.Inst.15Minutes.0.Best-NAB-Computed", "label":"Outflow", "base_parameter":"Flow", "parameter":"Flow-Out", "unit":"cfs", "unit_long_name":"Cubic feet per second", "latest_time":"2026-04-14T13:00:00Z", "latest_value":550.15, "delta24h":null, "sort_order":7, "results":null }, { "tsid":"Cowanesque.Elev.Inst.15Minutes.0.Best-NAB", "label":"Elevation", "base_parameter":"Elev", "parameter":"Elev", "unit":"ft", "unit_long_name":"Feet", "latest_time":"2026-04-14T22:00:00Z", "latest_value":1080.92, "delta24h":null, "sort_order":1, "results":null }, { "tsid":"Cowanesque.Stor.Inst.15Minutes.0.Best-NAB", "label":"Flood Storage", "base_parameter":"Stor", "parameter":"Stor", "unit":"ac-ft", "unit_long_name":"Acre-feet", "latest_time":"2026-04-14T22:00:00Z", "latest_value":30841.95, "delta24h":null, "sort_order":11, "results":null }, { "tsid":"Cowanesque.Precip.Inst.15Minutes.0.Best-NAB", "label":"Precipitation", "base_parameter":"Precip", "parameter":"Precip", "unit":"in", "unit_long_name":"Inches", "latest_time":"2026-04-14T22:00:00Z", "latest_value":12.37, "delta24h":null, "sort_order":16, "results":null }, { "tsid":"Cowanesque.Temp-Air.Inst.15Minutes.0.Best-NAB", "label":"Air Temperature", "base_parameter":"Temp", "parameter":"Temp-Air", "unit":"F", "unit_long_name":"Fahrenheit", "latest_time":"2026-04-14T22:00:00Z", "latest_value":71.0, "delta24h":null, "sort_order":22, "results":null } ], "name":"Cowanesque Lake", "hasResopsAverages":"false", "nidId":"PA01134", "nidid":"", "levels":[ { "slug":"elev.25% flood storage", "label":"25% Flood Storage", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Cowanesque.Elev.Inst.0.25% Flood Storage", "latest_value":1091.8, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.5% flood storage", "label":"5% Flood Storage", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Cowanesque.Elev.Inst.0.5% Flood Storage", "latest_value":1082.57, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.50% flood storage", "label":"50% Flood Storage", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Cowanesque.Elev.Inst.0.50% Flood Storage", "latest_value":1101.51, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.maximum", "label":"Maximum", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Cowanesque.Elev.Inst.0.Maximum", "latest_value":1144.2, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.record", "label":"Record", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Cowanesque.Elev.Inst.0.Record", "latest_value":1114.77, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.spillway crest", "label":"Spillway Crest", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Cowanesque.Elev.Inst.0.Spillway Crest", "latest_value":1117, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.streambed", "label":"Streambed", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Cowanesque.Elev.Inst.0.Streambed", "latest_value":1000, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of conservation", "label":"Top of Conservation", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Cowanesque.Elev.Inst.0.Top of Conservation", "latest_value":1080, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of dam", "label":"Top of Dam", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Cowanesque.Elev.Inst.0.Top of Dam", "latest_value":1151, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of flood control", "label":"Top of Flood Control", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Cowanesque.Elev.Inst.0.Top of Flood Control", "latest_value":1117, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of inactive", "label":"Top of Inactive", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Cowanesque.Elev.Inst.0.Top of Inactive", "latest_value":1010.96, "units":"ft", "units_long_name":"Feet" }, { "slug":"stor.streambed", "label":"Streambed", "parameter":"Stor", "base_parameter":"Stor", "tsid":"Cowanesque.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":"Cowanesque.Stor.Inst.0.Top of Conservation", "latest_value":29875.95, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of dam", "label":"Top of Dam", "parameter":"Stor", "base_parameter":"Stor", "tsid":"Cowanesque.Stor.Inst.0.Top of Dam", "latest_value":187716.87, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of flood control", "label":"Top of Flood Control", "parameter":"Stor", "base_parameter":"Stor", "tsid":"Cowanesque.Stor.Inst.0.Top of Flood Control", "latest_value":84746.87, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of inactive", "label":"Top of Inactive", "parameter":"Stor", "base_parameter":"Stor", "tsid":"Cowanesque.Stor.Inst.0.Top of Inactive", "latest_value":4, "units":"ac-ft", "units_long_name":"Acre-feet" } ], "id":549967, "associatedStructuresCount":0, "conditionAssessDate":null, "conditionAssessDetail":null, "conditionAssessId":6, "damHeight":151, "damLength":3100, "distance":null, "drainageArea":298, "eapId":1, "dsacAssignedDate":"2009-05-12T12:00:00.000Z", "eapMeetsGuidelinesId":1, "emergencyContactsUpdated":"2022-10-20T12:00:00.000Z", "eapLastRevDate":"2022-10-20T12:00:00.000Z", "enforcementAuthorityId":0, "federalId":"PA01134", "oldFederalId":"PA01134", "hazardId":4, "hydraulicHeight":147, "inspectionAuthorityId":0, "inspectionDate":"2024-06-06T12:00:00.000Z", "inspectionFrequency":5, "jurisdictionAuthorityId":0, "latitude":41.9871668550001, "lengthOfLocks":0, "secondaryLengthOfLocks":null, "longitude":-77.152722512, "maxDischarge":224000, "maxStorage":84747, "nidHeight":151, "nidStorage":84747, "normalStorage":29876, "numberOfLocks":0, "operationalStatusDate":"2009-05-12T12:00:00.000Z", "operationalStatusId":1, "originalDesignerName":null, "otherStructureId":null, "permittingAuthorityId":0, "politicalPartyId":null, "privateDamId":null, "projectDescription":"The U.S. Army Corps of Engineers (USACE) built Cowanesque Dam in 1980 to reduce the risk of flooding to downstream communities by storing water during major flood events. It is located on the Cowanesque River in Tioga County, PA, approximately two miles upstream of the confluence with the Tioga River in Lawrenceville, PA. The dam consists of an earthen embankment that creates Cowanesque Lake which provides water supply and recreation benefits. Releases are made by gates which discharge flow through a conduit beneath the dam. The project also includes an ungated spillway which can release large flows during significant flood events.", "riskCharSummary":"Although Cowanesque Dam reduces the risk of flooding to downstream communities, it does not eliminate the risk of flooding. The most likely scenario that could result in downstream flooding would be a high-volume release of water from the dam\u2019s spillway during significant storm events. To maintain the structural integrity of the dam when the water level in the reservoir gets high, the spillway releases water to the Cowanesque River. The amount of water being released could be great enough to cause flooding in downstream communities. Such higher releases from the dam could create conditions similar to how the river might behave if the dam did not exist.\n\nThere are also unlikely, but far more devastating scenarios involving breach of the dam that would produce significant flooding. This could involve situations such as: a rare, extreme rainfall event resulting in water flowing over the earthen dam, eroding the dam and leading to a breach of the dam; or unexpected behavior of seepage through the dam, eroding soil from within the embankment and leading to a breach of the dam. If a breach were to occur, an uncontrolled surge of water would flow out of the reservoir, flooding downstream communities. Lawrenceville, Tioga, Corning, Elmira and adjacent communities are in the most immediate danger in the event of a flood. Other communities along the Tioga and Chemung Rivers would also be impacted.\n\nIn any of the scenarios described above, the downstream floodwater would be swift and deep, overflowing levees and destroying buildings and key infrastructure. Those 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":"The U.S. Army Corps of Engineers (USACE) performs ongoing activities to ensure the integrity of Cowanesque Dam and to manage and reduce risk to the downstream communities. The dam is well-maintained, inspected, and monitored. The frequency of inspection and monitoring increases during high water events. USACE regularly updates the Emergency Action Plan for the dam and performs emergency response exercises with Federal, state, and local emergency managers to remain prepared to respond to flood events affecting the dam. USACE also closely follows rainfall forecasts to determine when high water events may occur to provide information for any necessary flood warnings.", "riverName":"COWANESQUE RIVER", "separateStructuresCount":0, "sourceAgency":"US Army Corps of Engineers", "spillwayTypeId":3, "spillwayWidth":400, "stateFedId":"PA01134", "stateRegulatoryAgency":null, "stateRegulatedId":0, "structuralHeight":151, "submitDate":"2021-05-28T12:00:00.000Z", "surfaceArea":1050, "volume":8144000, "widthOfLocks":0, "secondaryWidthOfLocks":null, "yearCompleted":1980, "congDist":"Congressional District 15, Pennsylvania", "city":"LAWRENCEVILLE", "county":"Tioga", "aiannh":null, "websiteUrl":"https://www.usace.army.mil/Missions/Civil-Works/Dam-Safety-Program/Article/2870967/dam-safety-program/", "coreTypeIds":"3", "damTypeIds":"5;8", "fedConstructionIds":"1", "fedDesignIds":"1", "fedFundingIds":"1", "fedInspectionIds":"1", "fedOperationIds":"1", "fedOtherIds":"1", "fedOwnerIds":"1", "fedRegulatoryIds":"1", "formerNames":null, "foundationTypeIds":"3", "nonFederalDamOnFederalId":0, "designerNames":"CENAB", "otherNames":"Cowanesque Lake", "ownerNames":"USACE - Baltimore District", "ownerTypeIds":"3", "primaryDamTypeId":5, "primaryOwnerTypeId":3, "primaryPurposeId":9, "purposeIds":"9;5;8", "dsacId":4, "femaRegion":"3", "lastEapExcerDate":"2024-05-08T12:00:00.000Z", "dataUpdated":"2025-01-30T12:00:00.000Z", "usaceDistrict":"Baltimore District", "noConsequencesId":0, "secretaryAgricultureBuiltId":null, "nrcsWatershedAuthorizationId":null, "isAssociatedStructureId":"No", "fedRegulatedId":"Yes", "inundationNidAddedId":1, "damStatusId":2, "huc06":"020501", "doi_region":null, "doi_region_name":"North Atlantic-Appalachian", "doi_region_number":1 }, "id":300020, "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/300020?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/300020?f=jsonld" }, { "rel":"alternate", "type":"text/html", "title":"This document as HTML", "href":"https://api.wwdh.internetofwater.app/collections/usace-edr/items/300020?f=html" }, { "rel":"collection", "type":"application/json", "title":"USACE Access2Water API", "href":"https://api.wwdh.internetofwater.app/collections/usace-edr" } ] }