{ "bbox":null, "type":"Feature", "geometry":{ "bbox":null, "type":"Point", "coordinates":[ -79.91109, 39.72712 ] }, "properties":{ "provider":"LRP", "code":"PointMarion", "slug":"pointmarion", "elevation":769.0, "horizontal_datum":"WGS84", "vertical_datum":"NGVD29", "state":"PA", "kind":"PROJECT", "nearest_city":"Morgantown", "public_name":"Point Marion L/D", "location_code":16747111, "nsid":null, "aliases":{ "NIDID":"PA00125" }, "timeseries":[ { "tsid":"PointMarion-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":"2026-04-14T22:00:00Z", "latest_value":5473.71, "delta24h":null, "sort_order":7, "results":null }, { "tsid":"PointMarion-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":9.72, "delta24h":null, "sort_order":4, "results":null }, { "tsid":"PointMarion-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":11.17, "delta24h":null, "sort_order":5, "results":null } ], "name":"Point Marion L/D", "hasResopsAverages":"false", "nidId":"PA00125", "nidid":"", "levels":[ { "slug":"stage.streambed", "label":"Streambed", "parameter":"Stage", "base_parameter":"Stage", "tsid":"PointMarion.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":"PointMarion.Stage.Inst.0.Top of Dam", "latest_value":9, "units":"ft", "units_long_name":"Feet" } ], "id":549949, "associatedStructuresCount":0, "conditionAssessDate":null, "conditionAssessDetail":null, "conditionAssessId":6, "damHeight":null, "damLength":638, "distance":1, "drainageArea":2715, "eapId":1, "dsacAssignedDate":"2025-05-13T12:00:00.000Z", "eapMeetsGuidelinesId":1, "emergencyContactsUpdated":"2024-10-25T12:00:00.000Z", "eapLastRevDate":"2016-03-28T12:00:00.000Z", "enforcementAuthorityId":0, "federalId":"PA00125", "oldFederalId":"PA00125", "hazardId":3, "hydraulicHeight":35, "inspectionAuthorityId":0, "inspectionDate":"2024-06-10T12:00:00.000Z", "inspectionFrequency":5, "jurisdictionAuthorityId":0, "latitude":39.7275539940001, "lengthOfLocks":360, "secondaryLengthOfLocks":null, "longitude":-79.911796168, "maxDischarge":55000, "maxStorage":11500, "nidHeight":52, "nidStorage":11500, "normalStorage":11500, "numberOfLocks":1, "operationalStatusDate":"2009-05-01T12:00:00.000Z", "operationalStatusId":1, "originalDesignerName":null, "otherStructureId":null, "permittingAuthorityId":0, "politicalPartyId":null, "privateDamId":null, "projectDescription":"The U.S. Army Corps of Engineers (USACE) constructed Lock and Dam No. 8 across the Monongahela River from 1923 to 1925. The dam was reconstructed in 1959 and the lock was reconstructed from 1990 to 1993 and the project was renamed Point Marion Lock and Dam. The dam is located near Point Marion, Pennsylvania, about 91 river miles upstream of the confluence of the Allegheny and Monongahela Rivers in Pittsburgh, Pennsylvania. The purpose of the dam is to create a navigation pool from the dam upstream to Morgantown Lock and Dam, which is located near Morgantown, Pennsylvania. The dam is composed of concrete and has of two concrete spillway sections and six steel gates which allow the river to flow. The lock provides a lift of 19 feet, from the pool downstream of the dam (lower pool) to the pool above the dam (upper pool). The lock allows river traffic to travel upstream or downstream of the dam. The lock consists of a rectangular chamber that is 84 feet wide by 720 feet long and formed on each side by concrete walls and steel gates on the upstream and downstream ends. The pool created by the dam also provides water supply for the local area and provides recreational opportunities for the region. The economic benefit of shipping materials and goods through the lock, water supply, and recreation is more than 32 million dollars annually. The dam does not provide the nearby communities any protection from flooding.", "riskCharSummary":"The most recent risk assessment of the dam was performed in 2024, which characterized the risk as very low. The assessment identified one scenario that could cause the dam to fail. When the river is at higher-than-normal levels, a runaway barge could become trapped on the dam which could prevent one or more dam gates from closing. Inability to close the dam gate could drain the upper pool to the extent that river traffic would be halted. If the upper pool were lost, the primary consequences would be the loss of shipping, water supply, and recreation, which would damage the regional economy by more than 32 million dollars per year. The economic damage would be temporary, until the upper pool could be restored to allow resumption of shipping and boat recreation. Due to the relatively low height of the dam, which lies entirely within the banks of the Monongahela River, downstream flooding would not be expected if the dam were to fail, and the upper pool was lost.", "riskManagementMeasures":"To ensure we are taking all steps to reduce the risk to the economy, we will continue to work closely with the Coast Guard, the Waterways Association and the shipping industry to keep them aware of conditions at the dam and changes to lock operations. We conduct emergency exercises with our external partners to improve communication 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. 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: \n\nhttp://water.weather.gov/ahps2/forecasts.php?wfo=pbz", "riverName":"MONONGAHELA RIVER", "separateStructuresCount":0, "sourceAgency":"US Army Corps of Engineers", "spillwayTypeId":1, "spillwayWidth":420, "stateFedId":"PA00125", "stateRegulatoryAgency":null, "stateRegulatedId":0, "structuralHeight":52, "submitDate":"2023-02-16T17:25:13.056Z", "surfaceArea":710, "volume":0, "widthOfLocks":56, "secondaryWidthOfLocks":null, "yearCompleted":1959, "congDist":"Congressional District 14, Pennsylvania", "city":"POINT MARION", "county":"Greene", "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":"Point Marion Pool", "ownerNames":"USACE - Pittsburgh District", "ownerTypeIds":"3", "primaryDamTypeId":9, "primaryOwnerTypeId":3, "primaryPurposeId":3, "purposeIds":"3", "dsacId":5, "femaRegion":"3", "lastEapExcerDate":"2021-05-05T12:00:00.000Z", "dataUpdated":"2025-06-02T12:37:27.219Z", "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":16747111, "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/16747111?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/16747111?f=jsonld" }, { "rel":"alternate", "type":"text/html", "title":"This document as HTML", "href":"https://api.wwdh.internetofwater.app/collections/usace-edr/items/16747111?f=html" }, { "rel":"collection", "type":"application/json", "title":"USACE Access2Water API", "href":"https://api.wwdh.internetofwater.app/collections/usace-edr" } ] }