{ "bbox":null, "type":"Feature", "geometry":{ "bbox":null, "type":"Point", "coordinates":[ -81.3692, 38.1928 ] }, "properties":{ "provider":"LRH", "code":"LondonLD", "slug":"londonld", "elevation":null, "horizontal_datum":"WGS84", "vertical_datum":"", "state":"WV", "kind":"PROJECT", "nearest_city":"London", "public_name":"London Locks and Dam", "location_code":28480108, "nsid":null, "aliases":{ "NIDID":"WV03907", "Local Loc ID":"LON" }, "timeseries":[ { "tsid":"LondonLD-Pool.Stage.Inst.15Minutes.0.OBS", "label":"Stage", "base_parameter":"Stage", "parameter":"Stage", "unit":"ft", "unit_long_name":"Feet", "latest_time":"2026-04-14T21:45:00Z", "latest_value":17.97, "delta24h":null, "sort_order":4, "results":null }, { "tsid":"LondonLD-Tailwater.Stage.Inst.15Minutes.0.OBS", "label":"Stage Tailwater", "base_parameter":"Stage", "parameter":"Stage", "unit":"ft", "unit_long_name":"Feet", "latest_time":"2026-04-14T21:45:00Z", "latest_value":9.32, "delta24h":null, "sort_order":5, "results":null } ], "name":"London Locks and Dam", "hasResopsAverages":"false", "nidId":"WV03907", "nidid":"", "levels":[ { "slug":"stage.flood", "label":"Flood", "parameter":"Stage-Tailwater", "base_parameter":"Stage", "tsid":"LondonLD.Stage-Tailwater.Inst.0.Flood", "latest_value":36, "units":"ft", "units_long_name":"Feet" } ], "id":549910, "associatedStructuresCount":0, "conditionAssessDate":null, "conditionAssessDetail":null, "conditionAssessId":6, "damHeight":null, "damLength":948, "distance":1, "drainageArea":8490, "eapId":1, "dsacAssignedDate":"2023-03-31T12:00:00.000Z", "eapMeetsGuidelinesId":1, "emergencyContactsUpdated":null, "eapLastRevDate":null, "enforcementAuthorityId":0, "federalId":"WV03907", "oldFederalId":"WV03907", "hazardId":3, "hydraulicHeight":42, "inspectionAuthorityId":0, "inspectionDate":"2022-05-20T12:00:00.000Z", "inspectionFrequency":5, "jurisdictionAuthorityId":0, "latitude":38.192530172, "lengthOfLocks":360, "secondaryLengthOfLocks":null, "longitude":-81.3694288849999, "maxDischarge":12700, "maxStorage":15800, "nidHeight":103, "nidStorage":15800, "normalStorage":15800, "numberOfLocks":2, "operationalStatusDate":"2023-03-31T12:00:00.000Z", "operationalStatusId":1, "originalDesignerName":null, "otherStructureId":null, "permittingAuthorityId":0, "politicalPartyId":null, "privateDamId":null, "projectDescription":"The U.S. Army Corps of Engineers (USACE) operates and maintains more than 700 dams across the United States. A dam is an earthen embankment and/or solid concrete structure that is built across a river, stream, or other waterway to temporarily hold back and store water that would otherwise flow downstream. More detail related to this specific dam will be added at a future time.", "riskCharSummary":"The U.S. Army Corps of Engineers completed a risk assessment for London Locks and Dam in 2023 and classified the risk associated with failure as low. \n\nInundation maps and consequence estimates were not produced for this dam since there is no potential loss of life should it fail or mis-operate. This dam is designed with limited storage during normal and low water operations to ensure adequate flows to support navigation. During high flow events, the dam functions as a run-of-the-river project, allowing the river to pass through naturally. Therefore, in the unlikely event of a dam failure with low or normal water flows in the river, water would not overflow the riverbanks. If the dam failed during a large flood the dam itself would not affect the extent of flooding since it was not storing water.", "riskManagementMeasures":"USACE manages dam-related flood risks by continually monitoring the condition and health of the dam, prioritizing activities that will most impact the risks, and engaging upstream and downstream emergency managers and members of the public to raise awareness of the dam and support actions to prepare and be ready to respond in the case of a dam-related emergency. USACE works closely with local emergency managers to share what is known about the dam and support the development of local emergency and evacuation plans. USACE regularly updates the emergency action plan for the dam. Regular maintenance and repairs are performed as needed to keep the dam functioning properly.", "riverName":"KANAWHA RIVER", "separateStructuresCount":0, "sourceAgency":"US Army Corps of Engineers", "spillwayTypeId":1, "spillwayWidth":500, "stateFedId":"WV03907", "stateRegulatoryAgency":null, "stateRegulatedId":0, "structuralHeight":103, "submitDate":"2023-02-16T17:25:20.354Z", "surfaceArea":700, "volume":0, "widthOfLocks":56, "secondaryWidthOfLocks":null, "yearCompleted":1934, "congDist":"Congressional District 01, West Virginia", "city":"LONDON", "county":"Kanawha", "aiannh":null, "websiteUrl":"https://www.lrh.usace.army.mil/Missions/Civil-Works/Locks-and-Dams/London-Locks-and-Dam/", "coreTypeIds":"2", "damTypeIds":"11", "fedConstructionIds":"1", "fedDesignIds":"1", "fedFundingIds":"1", "fedInspectionIds":"1", "fedOperationIds":"1", "fedOtherIds":"1", "fedOwnerIds":"1", "fedRegulatoryIds":"1", "formerNames":null, "foundationTypeIds":"1", "nonFederalDamOnFederalId":0, "designerNames":"CELRH", "otherNames":null, "ownerNames":"USACE - Huntington District", "ownerTypeIds":"3", "primaryDamTypeId":11, "primaryOwnerTypeId":3, "primaryPurposeId":3, "purposeIds":"3;6", "dsacId":5, "femaRegion":"3", "lastEapExcerDate":null, "dataUpdated":"2025-03-07T12:00:00.000Z", "usaceDistrict":"Huntington District", "noConsequencesId":1, "secretaryAgricultureBuiltId":null, "nrcsWatershedAuthorizationId":null, "isAssociatedStructureId":"No", "fedRegulatedId":"Yes", "inundationNidAddedId":2, "damStatusId":2, "huc06":"050500", "doi_region":null, "doi_region_name":"North Atlantic-Appalachian", "doi_region_number":1 }, "id":28480108, "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/28480108?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/28480108?f=jsonld" }, { "rel":"alternate", "type":"text/html", "title":"This document as HTML", "href":"https://api.wwdh.internetofwater.app/collections/usace-edr/items/28480108?f=html" }, { "rel":"collection", "type":"application/json", "title":"USACE Access2Water API", "href":"https://api.wwdh.internetofwater.app/collections/usace-edr" } ] }