{ "bbox":null, "type":"Feature", "geometry":{ "bbox":null, "type":"Point", "coordinates":[ -80.89071, 38.2229 ] }, "properties":{ "provider":"LRH", "code":"Summersville", "slug":"summersville", "elevation":1500.0, "horizontal_datum":"WGS84", "vertical_datum":"NGVD29", "state":"WV", "kind":"PROJECT", "nearest_city":"Summersville", "public_name":"Summersville Lake", "location_code":264108, "nsid":null, "aliases":{ "Local Loc ID":"SUG", "NIDID":"WV06702" }, "timeseries":[ { "tsid":"Summersville-Lake.Stor.Inst.15Minutes.0.OBS", "label":"Flood Storage", "base_parameter":"Stor", "parameter":"Stor", "unit":"ac-ft", "unit_long_name":"Acre-feet", "latest_time":"2026-04-14T21:45:00Z", "latest_value":128013.98, "delta24h":null, "sort_order":11, "results":null }, { "tsid":"Summersville-Lake.Stor.Inst.15Minutes.0.OBS", "label":"Conservation Storage", "base_parameter":"Stor", "parameter":"Stor", "unit":"ac-ft", "unit_long_name":"Acre-feet", "latest_time":"2026-04-14T21:45:00Z", "latest_value":128013.98, "delta24h":null, "sort_order":13, "results":null }, { "tsid":"Summersville-Outflow.Precip.Total.15Minutes.15Minutes.OBS", "label":"Precipitation", "base_parameter":"Precip", "parameter":"Precip", "unit":"in", "unit_long_name":"Inches", "latest_time":"2026-04-14T21:45:00Z", "latest_value":0.0, "delta24h":null, "sort_order":16, "results":null }, { "tsid":"Summersville-Outflow.Elev.Inst.15Minutes.0.OBS", "label":"Elevation Tailwater", "base_parameter":"Elev", "parameter":"Elev", "unit":"ft", "unit_long_name":"Feet", "latest_time":"2026-04-14T21:45:00Z", "latest_value":1357.15, "delta24h":null, "sort_order":3, "results":null }, { "tsid":"Summersville-Outflow.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":7.15, "delta24h":null, "sort_order":5, "results":null }, { "tsid":"Summersville-Lake.Elev.Inst.15Minutes.0.OBS", "label":"Elevation", "base_parameter":"Elev", "parameter":"Elev", "unit":"ft", "unit_long_name":"Feet", "latest_time":"2026-04-14T21:45:00Z", "latest_value":1631.88, "delta24h":null, "sort_order":1, "results":null }, { "tsid":"Summersville-Outflow.Flow.Inst.15Minutes.0.OBS", "label":"Outflow", "base_parameter":"Flow", "parameter":"Flow", "unit":"cfs", "unit_long_name":"Cubic feet per second", "latest_time":"2026-04-14T21:45:00Z", "latest_value":210.51, "delta24h":null, "sort_order":7, "results":null }, { "tsid":"Summersville-Lake.Flow.Inst.15Minutes.0.OBS", "label":"Inflow", "base_parameter":"Flow", "parameter":"Flow", "unit":"cfs", "unit_long_name":"Cubic feet per second", "latest_time":"2026-04-14T21:45:00Z", "latest_value":817.88, "delta24h":null, "sort_order":6, "results":null } ], "name":"Summersville Lake", "hasResopsAverages":"true", "nidId":"WV06702", "nidid":"", "levels":[ { "slug":"elev.bottom of conservation", "label":"Bottom of Conservation", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Summersville.Elev.Inst.0.Bottom of Conservation", "latest_value":1465.5, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.bottom of flood", "label":"Bottom of Flood", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Summersville.Elev.Inst.0.Bottom of Flood", "latest_value":1652, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.bottom of normal", "label":"Bottom of Normal", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Summersville.Elev.Inst.0.Bottom of Normal", "latest_value":1574.4, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.streambed", "label":"Streambed", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Summersville.Elev.Inst.0.Streambed", "latest_value":1354, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of dam", "label":"Top of Dam", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Summersville.Elev.Inst.0.Top of Dam", "latest_value":1738, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of flood", "label":"Top of Flood", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Summersville.Elev.Inst.0.Top of Flood", "latest_value":1710, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of flood threat", "label":"Top of Flood Threat", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Summersville.Elev.Inst.0.Top of Flood Threat", "latest_value":1680, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of inactive", "label":"Top of Inactive", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Summersville.Elev.Inst.0.Top of Inactive", "latest_value":1465.5, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of normal", "label":"Top of Normal", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Summersville.Elev.Inst.0.Top of Normal", "latest_value":1650.58, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of record", "label":"Top of Record", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Summersville.Elev.Inst.0.Top of Record", "latest_value":1711.7, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of recreation", "label":"Top of Recreation", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Summersville.Elev.Inst.0.Top of Recreation", "latest_value":1652, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of water supply", "label":"Top of Water Supply", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Summersville.Elev.Inst.0.Top of Water Supply", "latest_value":1652, "units":"ft", "units_long_name":"Feet" }, { "slug":"stor.bottom of flood", "label":"Bottom of Flood", "parameter":"Stor", "base_parameter":"Stor", "tsid":"Summersville.Stor.Inst.0.Bottom of Flood", "latest_value":177439, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of flood", "label":"Top of Flood", "parameter":"Stor", "base_parameter":"Stor", "tsid":"Summersville.Stor.Inst.0.Top of Flood", "latest_value":399300, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of inactive", "label":"Top of Inactive", "parameter":"Stor", "base_parameter":"Stor", "tsid":"Summersville.Stor.Inst.0.Top of Inactive", "latest_value":7087, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of normal", "label":"Top of Normal", "parameter":"Stor", "base_parameter":"Stor", "tsid":"Summersville.Stor.Inst.0.Top of Normal", "latest_value":176943.08, "units":"ac-ft", "units_long_name":"Acre-feet" } ], "id":550067, "associatedStructuresCount":2, "conditionAssessDate":null, "conditionAssessDetail":null, "conditionAssessId":6, "damHeight":null, "damLength":2280, "distance":24, "drainageArea":803, "eapId":1, "dsacAssignedDate":"2018-11-26T12:00:00.000Z", "eapMeetsGuidelinesId":1, "emergencyContactsUpdated":"2024-07-25T12:00:00.000Z", "eapLastRevDate":"2011-07-06T12:00:00.000Z", "enforcementAuthorityId":0, "federalId":"WV06702", "oldFederalId":"WV06702", "hazardId":4, "hydraulicHeight":327, "inspectionAuthorityId":0, "inspectionDate":"2022-08-25T12:00:00.000Z", "inspectionFrequency":5, "jurisdictionAuthorityId":0, "latitude":38.2223566370001, "lengthOfLocks":0, "secondaryLengthOfLocks":null, "longitude":-80.890672039, "maxDischarge":412000, "maxStorage":413400, "nidHeight":390, "nidStorage":413400, "normalStorage":191540, "numberOfLocks":0, "operationalStatusDate":"2018-11-26T12:00:00.000Z", "operationalStatusId":2, "originalDesignerName":null, "otherStructureId":null, "permittingAuthorityId":0, "politicalPartyId":null, "privateDamId":null, "projectDescription":"Summersville Dam was designed and built by the US Army Corps of Engineers who completed the construction of Summersville Dam in 1966. The project was authorized by the Flood Control Act of 1938. Summersville Dam is located on the Gauley River, 34.5 miles upstream of the confluence of the Gauley River and the New River and 131.5 miles upstream of the mouth of the Kanawha River. It is located within the southern part of Nicholas County, West Virginia, about 5 miles southwest of Summersville, WV and 60 miles upstream from Charleston, WV, the primary consequence center. The authorized project purpose is flood control. Other authorized purposes include pollution abatement, recreation, fish and wildlife management and water supply. Summersville Dam is a rock-fill dam with a clay core that is 390 feet tall and 1,780 feet wide. The outlet works are in the right abutment of the dam and are gate controlled with a discharge capacity of approximately 19,000 cfs. The project has an uncontrolled spillway, which has the capacity to relay an additional 400,000 cfs downstream in the event of an extreme event. Additionally, two appurtenant dikes were constructed within saddles along the reservoir rim to protect adjacent population centers from raises of the Summersville Dam pool. Summersville Dam controls a drainage area of 803 square miles. Cumulative flood damages prevented are about $2 billion over the project life and average about $40.5 million annually.", "riskCharSummary":"Summersville Dam greatly reduces flood risks downstream; however, it does not eliminate these risks and significant flooding can still occur. There are rare storm events which cause more rainfall than the dam can store safely. While spillway flows at Summersville Dam would be very infrequent, they can result in catastrophic flooding in downstream communities along the Gauley and Kanawha Rivers including the Charleston, WV area. Critical infrastructure including roadways (evacuation routes) and bridges along the Gauley River, Kanawha River, and Ohio River as far downstream as Wheelersburg, OH may not be passable due to high flood waters during spillway flows. In some rare occasions, conditions could lead to dam flows greater than 400 thousand cubic feet every second, more than four times the flow over Niagara Falls. The most impacted communities for any breach scenario and non-breach spillway flow scenario are Charleston, WV, and its surrounding area. In the scenario where the spillway was to breach, downstream flows would be expected to increase by about 50 percent. In the very unlikely event that overtopping were to occur, it would occur at the dikes before the dam is overtopped. Significant flood depths are expected from both non-breach (spillway flow) and breach conditions (failure of the dam) with life loss and economic impacts extending downstream to Charleston, WV. \n\nThe U.S. Army Corps of Engineers completed a risk assessment for Summersville Dam in November 2018 that characterizes the risk from breach of the dam and Dike No. 2 as moderate while risk from breach of Dike No. 1 as low. Although risks associated with a failure are moderate, there is high risk associated with the dam operating as intended due to the large spillway outflow capacity, the narrow valley terrain downstream of the dam, and the population centers along the river.", "riskManagementMeasures":"There are numerous activities that the U.S. Army Corps of Engineers conducts on a day-to-day basis to help manage risk at Summersville Dam. The dam is well maintained through continuous operations and maintenance activities and teams of engineers conduct detailed inspections of the dam during both normal lake levels and during flood events. Supplementing these inspections, the dam has a specialized instrumentation and monitoring system to allow U.S. Army Corps of Engineers staff to continually evaluate the dam for changing conditions. Risk management and emergency response actions are being supported by conducting emergency exercises and dam safety training with U.S. Army Corps of Engineers staff and local and state emergency responders. Additionally, the dam\u2019s Emergency Action Plan is routinely updated to improve emergency response actions. Interim risk reduction measures have been completed to survey the crest of the dams and dikes, an emergency exercise has been completed, and vegetation and trees removed from the downstream end of the spillway channel.", "riverName":"GAULEY RIVER", "separateStructuresCount":2, "sourceAgency":"US Army Corps of Engineers", "spillwayTypeId":3, "spillwayWidth":1250, "stateFedId":"WV06702", "stateRegulatoryAgency":null, "stateRegulatedId":0, "structuralHeight":390, "submitDate":"2023-11-30T00:00:00.000Z", "surfaceArea":2790, "volume":13565000, "widthOfLocks":0, "secondaryWidthOfLocks":null, "yearCompleted":1965, "congDist":"Congressional District 01, West Virginia", "city":"SWISS", "county":"Nicholas", "aiannh":null, "websiteUrl":"https://www.lrh.usace.army.mil/Missions/Civil-Works/Dam-Safety-Program/", "coreTypeIds":"3", "damTypeIds":"5", "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":"Summersville Lake", "ownerNames":"USACE - Huntington District", "ownerTypeIds":"3", "primaryDamTypeId":5, "primaryOwnerTypeId":3, "primaryPurposeId":9, "purposeIds":"9;12;4;5;6", "dsacId":3, "femaRegion":"3", "lastEapExcerDate":"2024-07-25T12:00:00.000Z", "dataUpdated":"2025-04-17T12:00:00.000Z", "usaceDistrict":"Huntington District", "noConsequencesId":0, "secretaryAgricultureBuiltId":null, "nrcsWatershedAuthorizationId":null, "isAssociatedStructureId":"No", "fedRegulatedId":"Yes", "inundationNidAddedId":1, "damStatusId":2, "huc06":"050500", "doi_region":null, "doi_region_name":"North Atlantic-Appalachian", "doi_region_number":1, "thirtyYearAverage":190.9976, "tenthPercentile":127.8828, "ninetiethPercentile":237.8424 }, "id":264108, "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/264108?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/264108?f=jsonld" }, { "rel":"alternate", "type":"text/html", "title":"This document as HTML", "href":"https://api.wwdh.internetofwater.app/collections/usace-edr/items/264108?f=html" }, { "rel":"collection", "type":"application/json", "title":"USACE Access2Water API", "href":"https://api.wwdh.internetofwater.app/collections/usace-edr" } ] }