{ "bbox":null, "type":"Feature", "geometry":{ "bbox":null, "type":"Point", "coordinates":[ -79.90012, 40.14615 ] }, "properties":{ "provider":"LRP", "code":"Charleroi", "slug":"charleroi", "elevation":717.9, "horizontal_datum":"WGS84", "vertical_datum":"NGVD29", "state":"PA", "kind":"PROJECT", "nearest_city":"McKeesport", "public_name":"L/D-4, Charleroi", "location_code":16602111, "nsid":null, "aliases":{ "NIDID":"PA00122" }, "timeseries":[ { "tsid":"Charleroi-Lower.Flow-Lower.Inst.1Hour.0.OBS", "label":"Outflow", "base_parameter":"Flow", "parameter":"Flow-Lower", "unit":"cfs", "unit_long_name":"Cubic feet per second", "latest_time":"2026-04-09T18:00:00Z", "latest_value":0.0, "delta24h":null, "sort_order":7, "results":null }, { "tsid":"Charleroi-Lower.Precip-Inc.Total.1Hour.1Hour.OBS", "label":"Precipitation", "base_parameter":"Precip", "parameter":"Precip-Inc", "unit":"in", "unit_long_name":"Inches", "latest_time":"2026-04-14T22:00:00Z", "latest_value":0.0, "delta24h":null, "sort_order":16, "results":null }, { "tsid":"Charleroi-Lower.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":7.67, "delta24h":null, "sort_order":5, "results":null }, { "tsid":"Charleroi-Lower.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":10.45, "delta24h":null, "sort_order":4, "results":null } ], "name":"L/D-4, Charleroi", "hasResopsAverages":"false", "nidId":"PA00122", "nidid":"", "levels":[ { "slug":"stage.streambed", "label":"Streambed", "parameter":"Stage", "base_parameter":"Stage", "tsid":"Charleroi.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":"Charleroi.Stage.Inst.0.Top of Dam", "latest_value":9, "units":"ft", "units_long_name":"Feet" } ], "id":549946, "associatedStructuresCount":0, "conditionAssessDate":null, "conditionAssessDetail":null, "conditionAssessId":6, "damHeight":null, "damLength":701, "distance":1, "drainageArea":5214, "eapId":1, "dsacAssignedDate":"2009-05-12T12:00:00.000Z", "eapMeetsGuidelinesId":1, "emergencyContactsUpdated":"2024-10-25T12:00:00.000Z", "eapLastRevDate":"2021-09-08T12:00:00.000Z", "enforcementAuthorityId":0, "federalId":"PA00122", "oldFederalId":"PA00122", "hazardId":3, "hydraulicHeight":26, "inspectionAuthorityId":0, "inspectionDate":"2021-10-04T12:00:00.000Z", "inspectionFrequency":5, "jurisdictionAuthorityId":0, "latitude":40.146537639, "lengthOfLocks":720, "secondaryLengthOfLocks":null, "longitude":-79.8995065569999, "maxDischarge":100000, "maxStorage":25100, "nidHeight":40, "nidStorage":25100, "normalStorage":25100, "numberOfLocks":2, "operationalStatusDate":"2009-05-12T12:00:00.000Z", "operationalStatusId":2, "originalDesignerName":null, "otherStructureId":null, "permittingAuthorityId":0, "politicalPartyId":null, "privateDamId":null, "projectDescription":"The US Army Corps of Engineers (USACE) initially constructed Charleroi Locks and Dam in 1931 across the Monongahela river and constructed additional features in 1963 to 1967, including steel gates on the dam crest. The dam is located near Charleroi, Pennsylvania, about 41 river miles upstream of the confluence of the Allegheny and Monongahela Rivers in Pittsburgh, PA. The purpose of the dam is to create a navigation pool from the dam upstream to Maxwell Locks and Dam, which is located near Luzerne, Pennsylvania. The dam consists of a concrete dam with 5 steel gates. Charleroi was originally constructed with two locks to provide a lift of about 17 feet, from the pool downstream of the dam to the pool above the dam. There is currently only one active lock chamber (land chamber), which is 56 feet wide by 720 feet long with steel gates on the upstream and downstream sides. The other lock (river chamber) is inactive because it lies within the footprint of ongoing lock replacement construction. Once construction is complete, Charleroi will have a single lock chamber that will be 84 feet wide by 720 feet long and the current land chamber will be retired. The dam provides only limited control of the upstream river levels and does not provide the nearby communities any protection from flooding. Charleroi locks and dam passes approximately 12 million tons of cargo every year, providing annual benefits of approximately $100 million.", "riskCharSummary":"USACE completed a risk assessment in 2008, which characterized the risk posed by the dam as high. The assessment identified one primary scenario that could cause the dam to fail. During times of normal or high river levels, erosion of the downstream riverbed could destabilize the stilling basin, which consists of a concrete slab situated just downstream of the dam that helps to dissipate the energy of the water flowing over the dam. If this were to happen, portions of the concrete dam could slide downstream to the extent that the upper pool would be lost (i.e., too low to allow river traffic to continue). If the upper pool was lost, the main consequence would be the temporary loss of shipping. Although the dam holds back water, a dam failure at Charleroi will not result in the flooding of downstream communities.", "riskManagementMeasures":"Charleroi Locks and Dam has undergone extensive rehabilitation to mitigate risks. This rehabilitation includes construction of an extension of the stilling basin downstream of the dam in addition to lock reconstruction. This work has decreased the primary vulnerability of the dam. USACE routinely works with stakeholders to communicate risks, and to ensure awareness of any changes regarding the structure. These stakeholders include the Coast Guard, Waterways Association, and the shipping industry. We conduct emergency exercises with our stakeholders to improve communications and reactions in the event of an emergency that threatens the dam or that may adversely affect shipping. We regularly update our emergency action plan. We conduct routine monitoring and surveillance of the lock and dam, particularly of the more vulnerable features. This monitoring involves inspections and instrumentation that allows us to monitor the stability of the concrete lock and dam structures. The staff maintains a continuous presence and is aware of conditions that could threaten the stability of the structures. We closely follow rainfall forecasts to determine when high river events may occur to provide information for any necessary public or industry notifications. We closely monitor river levels and provide advisories if river levels may become unsafe for shipping. Information on river levels and forecasts are available to the public via the internet at: http://water.weather.gov/ahps2/forecasts.php?wfo=pbz.\n\n\nConnect with USACE to learn more about the Charleroi Locks and Dam.\n* Check out information about Charleroi Locks and Dam at: https://www.lrp.usace.army.mil/Missions/Navigation/Locks-and-Dams/Locks-Dam-4-Mon-River/\n* Follow the Pittsburgh District on Facebook at: www.facebook.com/PittsburghUSACE/", "riverName":"MONONGAHELA RIVER", "separateStructuresCount":0, "sourceAgency":"US Army Corps of Engineers", "spillwayTypeId":1, "spillwayWidth":463, "stateFedId":"PA00122", "stateRegulatoryAgency":null, "stateRegulatedId":0, "structuralHeight":40, "submitDate":"2023-02-16T17:25:30.637Z", "surfaceArea":1660, "volume":0, "widthOfLocks":56, "secondaryWidthOfLocks":null, "yearCompleted":1967, "congDist":"Congressional District 14, Pennsylvania", "city":"MONESSEN", "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", "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":"Monongahela River Pool 04", "ownerNames":"USACE - Pittsburgh District", "ownerTypeIds":"3", "primaryDamTypeId":9, "primaryOwnerTypeId":3, "primaryPurposeId":3, "purposeIds":"3", "dsacId":2, "femaRegion":"3", "lastEapExcerDate":"2023-09-08T12:00:00.000Z", "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":"050200", "doi_region":null, "doi_region_name":"North Atlantic-Appalachian", "doi_region_number":1 }, "id":16602111, "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/16602111?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/16602111?f=jsonld" }, { "rel":"alternate", "type":"text/html", "title":"This document as HTML", "href":"https://api.wwdh.internetofwater.app/collections/usace-edr/items/16602111?f=html" }, { "rel":"collection", "type":"application/json", "title":"USACE Access2Water API", "href":"https://api.wwdh.internetofwater.app/collections/usace-edr" } ] }