{ "bbox":null, "type":"Feature", "geometry":{ "bbox":null, "type":"Point", "coordinates":[ -115.3083, 48.41167 ] }, "properties":{ "provider":"NWS", "code":"LIB", "slug":"lib", "elevation":2342.0, "horizontal_datum":"WSG84", "vertical_datum":"NGVD29", "state":"MT", "kind":"PROJECT", "nearest_city":"Libby", "public_name":"LIBBY DAM", "location_code":54038029, "nsid":null, "aliases":{ "NIDID":"MT00652", "DCP Platform ID":"CE1192D4", "NWS Handbook 5 ID":"LYDM8" }, "timeseries":[ { "tsid":"LIB.Elev-Forebay.Inst.1Hour.0.CBT-REV", "label":"Elevation", "base_parameter":"Elev", "parameter":"Elev-Forebay", "unit":"ft", "unit_long_name":"Feet", "latest_time":"2026-04-14T22:00:00Z", "latest_value":2372.66, "delta24h":null, "sort_order":1, "results":null }, { "tsid":"LIB.Flow-In.Ave.~1Day.1Day.CBT-REV", "label":"Inflow", "base_parameter":"Flow", "parameter":"Flow-In", "unit":"cfs", "unit_long_name":"Cubic feet per second", "latest_time":"2026-04-14T06:00:00Z", "latest_value":12240.0, "delta24h":null, "sort_order":6, "results":null }, { "tsid":"LIB.Precip-Inc.Total.~1Day.1Day.CBT-REV", "label":"Precipitation", "base_parameter":"Precip", "parameter":"Precip-Inc", "unit":"in", "unit_long_name":"Inches", "latest_time":"2026-04-14T06:00:00Z", "latest_value":0.0, "delta24h":null, "sort_order":16, "results":null }, { "tsid":"LIB.Stor.Inst.1Hour.0.CBT-RAW", "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":2683246.8, "delta24h":null, "sort_order":11, "results":null }, { "tsid":"LIB.Flow-Out.Ave.1Hour.1Hour.CBT-REV", "label":"Outflow", "base_parameter":"Flow", "parameter":"Flow-Out", "unit":"cfs", "unit_long_name":"Cubic feet per second", "latest_time":"2026-04-14T22:00:00Z", "latest_value":19500.0, "delta24h":null, "sort_order":7, "results":null }, { "tsid":"LIB.Elev-Forebay.Inst.0.0.CENWDP-FRM-FCST", "label":"Elevation Rule Curve", "base_parameter":"Elev", "parameter":"Elev-Forebay", "unit":"ft", "unit_long_name":"Feet", "latest_time":"2026-04-01T07:00:00Z", "latest_value":2380.2, "delta24h":null, "sort_order":2, "results":null } ], "name":"LIBBY DAM", "hasResopsAverages":"true", "nidId":"MT00652", "nidid":"", "levels":[ { "slug":"elev.bottom of flood control", "label":"Bottom of Flood Control", "parameter":"Elev", "base_parameter":"Elev", "tsid":"LIB.Elev.Const.1Hour.Bottom of Flood Control", "latest_value":2287, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.bottom of normal", "label":"Bottom of Normal", "parameter":"Elev", "base_parameter":"Elev", "tsid":"LIB.Elev.Const.1Hour.Bottom of Normal", "latest_value":2287, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.spillway crest", "label":"Spillway Crest", "parameter":"Elev", "base_parameter":"Elev", "tsid":"LIB.Elev.Const.1Hour.Spillway Crest", "latest_value":2405, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.streambed", "label":"Streambed", "parameter":"Elev", "base_parameter":"Elev", "tsid":"LIB.Elev.Const.1Hour.Streambed", "latest_value":2040, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of dam", "label":"Top of Dam", "parameter":"Elev", "base_parameter":"Elev", "tsid":"LIB.Elev.Const.1Hour.Top of Dam", "latest_value":2472, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of flood", "label":"Top of Flood", "parameter":"Elev", "base_parameter":"Elev", "tsid":"LIB.Elev.Const.1Hour.Top of Flood", "latest_value":2459, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of normal", "label":"Top of Normal", "parameter":"Elev", "base_parameter":"Elev", "tsid":"LIB.Elev.Const.1Hour.Top of Normal", "latest_value":2459, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.bottom of flood", "label":"Bottom of Flood", "parameter":"Elev", "base_parameter":"Elev", "tsid":"LIB.Elev.Inst.0.Bottom of Flood", "latest_value":2372.64, "units":"ft", "units_long_name":"Feet" }, { "slug":"stor.bottom of flood control", "label":"Bottom of Flood Control", "parameter":"Stor", "base_parameter":"Stor", "tsid":"LIB.Stor.Inst.0.Bottom of Flood Control", "latest_value":null, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.bottom of normal", "label":"Bottom of Normal", "parameter":"Stor", "base_parameter":"Stor", "tsid":"LIB.Stor.Inst.0.Bottom of Normal", "latest_value":889925, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.spillway crest", "label":"Spillway Crest", "parameter":"Stor", "base_parameter":"Stor", "tsid":"LIB.Stor.Inst.0.Spillway Crest", "latest_value":3656168, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.streambed", "label":"Streambed", "parameter":"Stor", "base_parameter":"Stor", "tsid":"LIB.Stor.Inst.0.Streambed", "latest_value":0, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of dam", "label":"Top of Dam", "parameter":"Stor", "base_parameter":"Stor", "tsid":"LIB.Stor.Inst.0.Top of Dam", "latest_value":7000000, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of flood", "label":"Top of Flood", "parameter":"Stor", "base_parameter":"Stor", "tsid":"LIB.Stor.Inst.0.Top of Flood", "latest_value":5869401, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of normal", "label":"Top of Normal", "parameter":"Stor", "base_parameter":"Stor", "tsid":"LIB.Stor.Inst.0.Top of Normal", "latest_value":5869393, "units":"ac-ft", "units_long_name":"Acre-feet" } ], "id":550133, "associatedStructuresCount":0, "conditionAssessDate":null, "conditionAssessDetail":null, "conditionAssessId":6, "damHeight":null, "damLength":2890, "distance":17, "drainageArea":8985, "eapId":1, "dsacAssignedDate":"2024-07-11T12:00:00.000Z", "eapMeetsGuidelinesId":1, "emergencyContactsUpdated":"2024-11-01T12:00:00.000Z", "eapLastRevDate":"2024-11-22T12:00:00.000Z", "enforcementAuthorityId":0, "federalId":"MT00652", "oldFederalId":"MT00652", "hazardId":4, "hydraulicHeight":362, "inspectionAuthorityId":0, "inspectionDate":"2020-07-17T12:00:00.000Z", "inspectionFrequency":5, "jurisdictionAuthorityId":0, "latitude":48.4102884800001, "lengthOfLocks":0, "secondaryLengthOfLocks":null, "longitude":-115.31426552, "maxDischarge":150000, "maxStorage":6027000, "nidHeight":422, "nidStorage":6027000, "normalStorage":5809000, "numberOfLocks":0, "operationalStatusDate":"2016-05-15T12:00:00.000Z", "operationalStatusId":2, "originalDesignerName":null, "otherStructureId":null, "permittingAuthorityId":0, "politicalPartyId":null, "privateDamId":null, "projectDescription":"The U.S. Army Corps of Engineers (USACE) built Libby Dam in 1973. The dam is located on the Kootenai River (part of the international Columbia River system), approximately 17 miles upstream of Libby, Montana. The dam is a concrete structure with a spillway and stilling basin used to release large flows during extreme flood events. Other features include a powerhouse, visitor\u2019s center, and two downstream campgrounds. Libby Dam reduces downstream flood risk for Libby, Troy, and Bonner\u2019s Ferry by storing water during major flood events. In addition to flood risk management, the project\u2019s purposes also include power generation, recreation, navigation, and fish and wildlife conservation.", "riskCharSummary":"USACE completed a risk assessment for Libby Dam in May 2024 to determine the ability of USACE to meet the flood risk management goals of the dam. As a result, the project\u2019s risk is characterized as moderate due to earthquake hazards that may create a rockslide into the reservoir generating a wave overtopping the dam or an earthquake displacing the concrete structure of the dam causing a sudden release of water downstream. The latter would result in deadly flooding in Libby, Troy, and Bonner\u2019s Ferry. Although this failure scenario is considered unlikely, USACE maintains a Libby Dam Emergency Action Plan to lower the risk of life loss and property damage if this or other potential failure scenarios occurred.\n\nUSACE is confident that the dam is solidly built, well-maintained, and will continue to significantly reduce flood risks. However, the dam alone cannot eliminate flooding. Extreme snowmelt and rainfall events require USACE to release rising water through the dam\u2019s spillway to prevent overtopping and failure of the dam and to balance flood risk to the reservoir upstream. This can result in flooding areas downstream.", "riskManagementMeasures":"USACE is continuously taking significant steps to reduce risks to life safety and property, including the current on-going risk evaluation study. USACE conducts regular inspections and maintains a network of instruments to monitor the health of the dam. The frequency of inspections increases when conditions change to confirm whether the structure is performing as designed and identify areas of potential concern. Regular maintenance and repairs are performed as needed to keep the dam functioning properly. Rainfall and snowpack forecasts are continuously monitored to determine when high water events may occur to provide information for any necessary flood operations and associated warnings. USACE also works closely with local emergency managers to annually update the Emergency Action Plan, conducts periodic emergency exercises with state and local response teams, and annually hosts water control information stakeholder meetings.", "riverName":"KOOTENAI RIVER", "separateStructuresCount":0, "sourceAgency":"US Army Corps of Engineers", "spillwayTypeId":1, "spillwayWidth":48, "stateFedId":"MT00652", "stateRegulatoryAgency":null, "stateRegulatedId":0, "structuralHeight":422, "submitDate":"2023-10-25T18:37:20.097Z", "surfaceArea":46500, "volume":375000, "widthOfLocks":0, "secondaryWidthOfLocks":null, "yearCompleted":1973, "congDist":"Congressional District 01, Montana", "city":"LIBBY", "county":"Lincoln", "aiannh":null, "websiteUrl":"https://www.nws.usace.army.mil/Missions/Civil-Works/Locks-and-Dams/Libby-Dam/", "coreTypeIds":null, "damTypeIds":"9", "fedConstructionIds":"1;17", "fedDesignIds":"1;17", "fedFundingIds":"1;17", "fedInspectionIds":"1;17", "fedOperationIds":"1;17", "fedOtherIds":"1", "fedOwnerIds":"1;17", "fedRegulatoryIds":"1", "formerNames":null, "foundationTypeIds":null, "nonFederalDamOnFederalId":0, "designerNames":"CE", "otherNames":"Lake Koocanusa", "ownerNames":"USACE - Seattle District", "ownerTypeIds":"3", "primaryDamTypeId":9, "primaryOwnerTypeId":3, "primaryPurposeId":6, "purposeIds":"6;5;9", "dsacId":3, "femaRegion":"8", "lastEapExcerDate":"2024-10-09T12:00:00.000Z", "dataUpdated":"2025-07-10T12:00:00.000Z", "usaceDistrict":"Seattle District", "noConsequencesId":0, "secretaryAgricultureBuiltId":null, "nrcsWatershedAuthorizationId":null, "isAssociatedStructureId":"No", "fedRegulatedId":"Yes", "inundationNidAddedId":1, "damStatusId":2, "huc06":"170101", "doi_region":"CPN", "doi_region_name":"Columbia-Pacific Northwest", "doi_region_number":9, "thirtyYearAverage":2600.6287, "tenthPercentile":1250.1689, "ninetiethPercentile":3489.7 }, "id":54038029, "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/54038029?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/54038029?f=jsonld" }, { "rel":"alternate", "type":"text/html", "title":"This document as HTML", "href":"https://api.wwdh.internetofwater.app/collections/usace-edr/items/54038029?f=html" }, { "rel":"collection", "type":"application/json", "title":"USACE Access2Water API", "href":"https://api.wwdh.internetofwater.app/collections/usace-edr" } ] }