{ "bbox":null, "type":"Feature", "geometry":{ "bbox":null, "type":"Point", "coordinates":[ -80.20395, 40.55067 ] }, "properties":{ "provider":"LRP", "code":"Dashields", "slug":"dashields", "elevation":null, "horizontal_datum":"WGS84", "vertical_datum":"", "state":"PA", "kind":"PROJECT", "nearest_city":"Aliquippa", "public_name":"Dashields L/D", "location_code":16904111, "nsid":null, "aliases":{ "NIDID":"PA00127" }, "timeseries":[ { "tsid":"Dashields-Upper.Stage-Upper.Inst.1Hour.0.OBS", "label":"Stage", "base_parameter":"Stage", "parameter":"Stage-Upper", "unit":"ft", "unit_long_name":"Feet", "latest_time":"2026-04-14T22:00:00Z", "latest_value":15.8, "delta24h":null, "sort_order":4, "results":null }, { "tsid":"Dashields-Upper.Stage-Lower.Inst.1Hour.0.OBS", "label":"Stage Tailwater", "base_parameter":"Stage", "parameter":"Stage-Lower", "unit":"ft", "unit_long_name":"Feet", "latest_time":"2026-04-14T22:00:00Z", "latest_value":14.23, "delta24h":null, "sort_order":5, "results":null }, { "tsid":"Dashields-Upper.Flow-Upper.Inst.1Hour.0.OBS", "label":"Outflow", "base_parameter":"Flow", "parameter":"Flow-Upper", "unit":"cfs", "unit_long_name":"Cubic feet per second", "latest_time":"2026-04-14T22:00:00Z", "latest_value":39471.04, "delta24h":null, "sort_order":7, "results":null } ], "name":"Dashields L/D", "hasResopsAverages":"false", "nidId":"PA00127", "nidid":"", "levels":[ { "slug":"stage.streambed", "label":"Streambed", "parameter":"Stage", "base_parameter":"Stage", "tsid":"Dashields.Stage.Inst.0.Streambed", "latest_value":0, "units":"ft", "units_long_name":"Feet" }, { "slug":"stage.top of dam", "label":"Top of Dam", "parameter":"Stage", "base_parameter":"Stage", "tsid":"Dashields.Stage.Inst.0.Top of Dam", "latest_value":12, "units":"ft", "units_long_name":"Feet" } ], "id":549951, "associatedStructuresCount":0, "conditionAssessDate":null, "conditionAssessDetail":null, "conditionAssessId":6, "damHeight":null, "damLength":1799, "distance":null, "drainageArea":19522, "eapId":1, "dsacAssignedDate":"2017-09-30T12:00:00.000Z", "eapMeetsGuidelinesId":1, "emergencyContactsUpdated":"2024-10-25T12:00:00.000Z", "eapLastRevDate":"2021-09-08T12:00:00.000Z", "enforcementAuthorityId":0, "federalId":"PA00127", "oldFederalId":"PA00127", "hazardId":3, "hydraulicHeight":44, "inspectionAuthorityId":0, "inspectionDate":"2021-11-03T12:00:00.000Z", "inspectionFrequency":5, "jurisdictionAuthorityId":0, "latitude":40.5497637840001, "lengthOfLocks":600, "secondaryLengthOfLocks":null, "longitude":-80.2050888159999, "maxDischarge":235000, "maxStorage":17000, "nidHeight":44, "nidStorage":17000, "normalStorage":17000, "numberOfLocks":2, "operationalStatusDate":"2017-09-30T12:00:00.000Z", "operationalStatusId":1, "originalDesignerName":null, "otherStructureId":null, "permittingAuthorityId":0, "politicalPartyId":null, "privateDamId":null, "projectDescription":"The U.S. Army Corps of Engineers (USACE) completed construction of Dashields Locks and Dam across the Ohio River in 1928. The dam is located in Allegheny County, Pennsylvania, about 13 miles downstream of the head of the Ohio River in Pittsburgh, Pennsylvania. The purpose of the dam is to create a navigation pool from the dam upstream to Emsworth Locks and Dam, which is located Neville Township, Pennsylvania. The dam is concrete and has a fixed crest, which means that the river flows freely over it. The locks provide a lift of 10 feet, from the pool downstream of the dam (lower pool) to the pool above the dam (upper pool). The locks allow river traffic to travel upstream or downstream of the dam. The locks are rectangular chambers that are 110 feet wide by 600 feet long (main chamber) and 56 feet wide by 360 feet long (auxiliary chamber). The lock chambers are adjacent to each other and are formed on each side by concrete walls and steel gates on the upstream and downstream sides. Dashields Locks and Dam provides economic benefits by enabling shipping of materials and goods, water supply (through municipal intakes in the upper pool) and providing recreational opportunities for metropolitan Pittsburgh. The total benefits to the region are nearly 270 million dollars each year. The dam does not provide the nearby communities with any protection from flooding.", "riskCharSummary":"The most recent risk assessment of the dam was performed in 2016, which characterized the risk as very low. The assessment identified one primary, but very unlikely scenario that could cause the dam to fail. If the riverbed downstream of the dam were to erode deeply, a portion of the concrete dam could slide downstream and release the water in the upper pool. Although this scenario is very unlikely, it would most likely occur during a time of normal river levels. If the upper pool is released, river navigation would be halted, and water supply intakes could be affected resulting in a loss of economic benefits to the region of about 270 million dollars per year. The economic damage would be temporary, until the upper pool could be restored to allow resumption of shipping, water supply, and boat recreation. Although this scenario is possible, the dam has performed well for over 90 years without incident. Downstream flooding would not be expected if the dam were to fail, and the upper pool was lost.", "riskManagementMeasures":"To ensure all steps are being taken to reduce the risk to the economy, we conduct emergency exercises with our external partners to improve communications and reactions in the event of an emergency that threatens the dam\u2019s upper pool or may adversely affect navigation. We regularly update our emergency action plan. We also communicate with the Coast Guard, the Waterways Association, and the shipping industry to keep them aware of conditions at the dam and any changes to the lock operations. We conduct routine monitoring and surveillance of the riverbed and the locks and dam. We closely follow rainfall forecasts and river levels to determine when high river events may occur to provide information for any necessary public or industry notifications. Information on river levels and forecasts are available to the public via the internet at: \n\nhttp://water.weather.gov/ahps2/forecasts.php?wfo=pbz", "riverName":"OHIO RIVER", "separateStructuresCount":0, "sourceAgency":"US Army Corps of Engineers", "spillwayTypeId":3, "spillwayWidth":1585, "stateFedId":"PA00127", "stateRegulatoryAgency":null, "stateRegulatedId":0, "structuralHeight":39, "submitDate":"2023-02-16T17:25:25.512Z", "surfaceArea":1210, "volume":0, "widthOfLocks":110, "secondaryWidthOfLocks":null, "yearCompleted":1929, "congDist":"Congressional District 17, Pennsylvania", "city":"GLENWILLARD", "county":"Allegheny", "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":"Dashields Pool", "ownerNames":"USACE - Pittsburgh District", "ownerTypeIds":"3", "primaryDamTypeId":9, "primaryOwnerTypeId":3, "primaryPurposeId":3, "purposeIds":"3", "dsacId":5, "femaRegion":"3", "lastEapExcerDate":null, "dataUpdated":"2025-06-02T12:00:00.000Z", "usaceDistrict":"Pittsburgh District", "noConsequencesId":1, "secretaryAgricultureBuiltId":null, "nrcsWatershedAuthorizationId":null, "isAssociatedStructureId":"No", "fedRegulatedId":"Yes", "inundationNidAddedId":2, "damStatusId":2, "huc06":"050301", "doi_region":null, "doi_region_name":"North Atlantic-Appalachian", "doi_region_number":1 }, "id":16904111, "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/16904111?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/16904111?f=jsonld" }, { "rel":"alternate", "type":"text/html", "title":"This document as HTML", "href":"https://api.wwdh.internetofwater.app/collections/usace-edr/items/16904111?f=html" }, { "rel":"collection", "type":"application/json", "title":"USACE Access2Water API", "href":"https://api.wwdh.internetofwater.app/collections/usace-edr" } ] }