{ "bbox":null, "type":"Feature", "geometry":{ "bbox":null, "type":"Point", "coordinates":[ -82.3839, 38.1447 ] }, "properties":{ "provider":"LRH", "code":"EastLynn", "slug":"eastlynn", "elevation":600.01, "horizontal_datum":"WGS84", "vertical_datum":"NGVD29", "state":"WV", "kind":"PROJECT", "nearest_city":"East Lynn", "public_name":"East Lynn Lake", "location_code":1014108, "nsid":null, "aliases":{ "Local Loc ID":"ELT", "NIDID":"WV09901" }, "timeseries":[ { "tsid":"EastLynn-Lake.Elev.Inst.15Minutes.0.OBS", "label":"Elevation", "base_parameter":"Elev", "parameter":"Elev", "unit":"ft", "unit_long_name":"Feet", "latest_time":"2026-04-14T22:30:00Z", "latest_value":662.15, "delta24h":null, "sort_order":1, "results":null }, { "tsid":"EastLynn-Lake.Stor.Inst.15Minutes.0.OBS", "label":"Conservation Storage", "base_parameter":"Stor", "parameter":"Stor", "unit":"ac-ft", "unit_long_name":"Acre-feet", "latest_time":"2026-04-14T22:30:00Z", "latest_value":17341.15, "delta24h":null, "sort_order":13, "results":null }, { "tsid":"EastLynn-Outflow.Temp-Water.Inst.1Hour.0.OBS", "label":"Water Temperature", "base_parameter":"Temp", "parameter":"Temp-Water", "unit":"F", "unit_long_name":"Fahrenheit", "latest_time":"2026-04-14T22:30:00Z", "latest_value":66.6, "delta24h":null, "sort_order":17, "results":null }, { "tsid":"EastLynn-Lake.Flow.Inst.15Minutes.0.OBS", "label":"Inflow", "base_parameter":"Flow", "parameter":"Flow", "unit":"cfs", "unit_long_name":"Cubic feet per second", "latest_time":"2026-04-14T22:30:00Z", "latest_value":142.08, "delta24h":null, "sort_order":6, "results":null }, { "tsid":"EastLynn-Outflow.Stage.Inst.15Minutes.0.OBS", "label":"Stage Tailwater", "base_parameter":"Stage", "parameter":"Stage", "unit":"ft", "unit_long_name":"Feet", "latest_time":"2026-04-14T22:30:00Z", "latest_value":1.63, "delta24h":null, "sort_order":5, "results":null }, { "tsid":"EastLynn-Outflow.Flow.Inst.15Minutes.0.OBS", "label":"Outflow", "base_parameter":"Flow", "parameter":"Flow", "unit":"cfs", "unit_long_name":"Cubic feet per second", "latest_time":"2026-04-14T22:30:00Z", "latest_value":18.28, "delta24h":null, "sort_order":7, "results":null }, { "tsid":"EastLynn-Lake.Stor.Inst.15Minutes.0.OBS", "label":"Flood Storage", "base_parameter":"Stor", "parameter":"Stor", "unit":"ac-ft", "unit_long_name":"Acre-feet", "latest_time":"2026-04-14T22:30:00Z", "latest_value":17341.15, "delta24h":null, "sort_order":11, "results":null }, { "tsid":"EastLynn-Lake.Elev.Inst.1Day.0.RUL", "label":"Elevation Rule Curve", "base_parameter":"Elev", "parameter":"Elev", "unit":"ft", "unit_long_name":"Feet", "latest_time":"2026-04-14T17:00:00Z", "latest_value":661.65, "delta24h":null, "sort_order":2, "results":null }, { "tsid":"EastLynn-Outflow.Precip.Total.15Minutes.15Minutes.OBS", "label":"Precipitation", "base_parameter":"Precip", "parameter":"Precip", "unit":"in", "unit_long_name":"Inches", "latest_time":"2026-04-14T22:30:00Z", "latest_value":0.0, "delta24h":null, "sort_order":16, "results":null } ], "name":"East Lynn Lake", "hasResopsAverages":"true", "nidId":"WV09901", "nidid":"", "levels":[ { "slug":"elev.bottom of conservation", "label":"Bottom of Conservation", "parameter":"Elev", "base_parameter":"Elev", "tsid":"EastLynn.Elev.Inst.0.Bottom of Conservation", "latest_value":616, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.streambed", "label":"Streambed", "parameter":"Elev", "base_parameter":"Elev", "tsid":"EastLynn.Elev.Inst.0.Streambed", "latest_value":612, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of dam", "label":"Top of Dam", "parameter":"Elev", "base_parameter":"Elev", "tsid":"EastLynn.Elev.Inst.0.Top of Dam", "latest_value":722, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of flood", "label":"Top of Flood", "parameter":"Elev", "base_parameter":"Elev", "tsid":"EastLynn.Elev.Inst.0.Top of Flood", "latest_value":701, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of flood threat", "label":"Top of Flood Threat", "parameter":"Elev", "base_parameter":"Elev", "tsid":"EastLynn.Elev.Inst.0.Top of Flood Threat", "latest_value":680, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of inactive", "label":"Top of Inactive", "parameter":"Elev", "base_parameter":"Elev", "tsid":"EastLynn.Elev.Inst.0.Top of Inactive", "latest_value":616, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of normal", "label":"Top of Normal", "parameter":"Elev", "base_parameter":"Elev", "tsid":"EastLynn.Elev.Inst.0.Top of Normal", "latest_value":661.89, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of record", "label":"Top of Record", "parameter":"Elev", "base_parameter":"Elev", "tsid":"EastLynn.Elev.Inst.0.Top of Record", "latest_value":684.55, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of recreation", "label":"Top of Recreation", "parameter":"Elev", "base_parameter":"Elev", "tsid":"EastLynn.Elev.Inst.0.Top of Recreation", "latest_value":662, "units":"ft", "units_long_name":"Feet" }, { "slug":"stor.bottom of flood", "label":"Bottom of Flood", "parameter":"Stor", "base_parameter":"Stor", "tsid":"EastLynn.Stor.Inst.0.Bottom of Flood", "latest_value":17188, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.bottom of normal", "label":"Bottom of Normal", "parameter":"Stor", "base_parameter":"Stor", "tsid":"EastLynn.Stor.Inst.0.Bottom of Normal", "latest_value":10, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of dam", "label":"Top of Dam", "parameter":"Stor", "base_parameter":"Stor", "tsid":"EastLynn.Stor.Inst.0.Top of Dam", "latest_value":140113, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of flood", "label":"Top of Flood", "parameter":"Stor", "base_parameter":"Stor", "tsid":"EastLynn.Stor.Inst.0.Top of Flood", "latest_value":82500, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of inactive", "label":"Top of Inactive", "parameter":"Stor", "base_parameter":"Stor", "tsid":"EastLynn.Stor.Inst.0.Top of Inactive", "latest_value":10, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of normal", "label":"Top of Normal", "parameter":"Stor", "base_parameter":"Stor", "tsid":"EastLynn.Stor.Inst.0.Top of Normal", "latest_value":16728.73, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of recreation", "label":"Top of Recreation", "parameter":"Stor", "base_parameter":"Stor", "tsid":"EastLynn.Stor.Inst.0.Top of Recreation", "latest_value":16728.73, "units":"ac-ft", "units_long_name":"Acre-feet" } ], "id":550049, "associatedStructuresCount":0, "conditionAssessDate":null, "conditionAssessDetail":null, "conditionAssessId":6, "damHeight":null, "damLength":652, "distance":3, "drainageArea":133, "eapId":1, "dsacAssignedDate":"2022-11-12T12:00:00.000Z", "eapMeetsGuidelinesId":1, "emergencyContactsUpdated":"2024-07-25T12:00:00.000Z", "eapLastRevDate":"2024-06-01T12:00:00.000Z", "enforcementAuthorityId":0, "federalId":"WV09901", "oldFederalId":"WV09901", "hazardId":4, "hydraulicHeight":92, "inspectionAuthorityId":0, "inspectionDate":"2021-04-02T12:00:00.000Z", "inspectionFrequency":5, "jurisdictionAuthorityId":0, "latitude":38.144934784, "lengthOfLocks":0, "secondaryLengthOfLocks":null, "longitude":-82.384171974, "maxDischarge":80300, "maxStorage":82500, "nidHeight":113, "nidStorage":82500, "normalStorage":17190, "numberOfLocks":0, "operationalStatusDate":"2022-11-12T12:00:00.000Z", "operationalStatusId":1, "originalDesignerName":null, "otherStructureId":null, "permittingAuthorityId":0, "politicalPartyId":null, "privateDamId":null, "projectDescription":"The U.S. Army Corps of Engineers completed the East Lynn Dam in 1971. The project was authorized by the Flood Control Act of 1962 (PL 87-874) primarily for flood control. East Lynn Dam is a high hazard dam located in Wayne County, West Virginia. Most dams that the U.S. Army Corps of Engineers manages, if breached, would lead to loss of life and/or high economic impacts downstream causing them to be labeled \u201chigh hazard\u201d.\u202fThe dam is located 1.6 miles south of the town of East Lynn and 42 miles above the mouth of Twelvepole Creek. When the dam is not storing flood waters to reduce flood risks downstream, the dam operates to impound water for flood control, water conservation for general recreation, and fish and wildlife enhancement. This lake is raised in the warmer months to support boat access and lowered in the winter months for additional flood storage.\u202f \n\nThe dam helps regulate waters on Twelvepole Creek in the 133 square mile drainage area upstream of the dam. The dam helps to provide flood risk management downstream along the Twelvepole Creek, to Wayne, West Virginia, with additional benefits to Lavalette, West Virginia and other points downstream to the Ohio River. East Lynn Dam provides waters to keep downstream rivers flowing. However, when it is projected that Twelvepole Creek may cause flooding, water coming from upstream of the dam is stored until streams and rivers downstream of the dam recede. Typically storm waters can be released in a controlled manner to reduce flood impacts downstream. However, there are rare storms which can cause more rainfall and runoff than East Lynn Dam can store safely. When this occurs, the dam\u2019s spillway will begin to release or spill these waters to reduce the chance that the dam could be overtopped.\u202f\u202f \n\nThe embankment is a rolled rock fill construction with an impervious core, reaching a maximum height of 113 feet. The outlet works is comprised of an approach channel, intake structure, tunnel transition, tunnel, stilling basin, outlet channel, and service bridge. Flow is controlled through three sluice gates and a low-flow system. An emergency closure system is also in place for any open sluice. Additionally, a 230-foot-wide broad-crested uncontrolled spillway is located through the left valley wall that discharges into a natural ravine and returned to Twelvepole Creek about half a mile downstream from the dam. Records of average annual flood damages prevented for the dam were available from 1971 to 2018, with a cumulative total of $284.2 million (2024 price level). The average annual lost benefit of $5.9 million was obtained by dividing the cumulative total by the 48 years the project has been in operation.", "riskCharSummary":"The U.S. Army Corps of Engineers completed a risk assessment for East Lynn Dam in 2021 and classified the risk associated with failure as very low. Three risk drivers were identified during this assessment. (1) Overtopping of the embankment, (2) spillway erosion, and (3) concentrated leak erosion through the left abutment and embankment. Overtopping the embankment was the leading risk driving potential failure mode (PMF) for this assessment but ultimately is still considered to be a relatively low-risk event with a probability of 1 in a million. \n\nEast Lynn Dam significantly reduces the risk of flooding to surrounding communities and although the risks associated with a breach or failure are very low, the dam does not eliminate flood risks downstream. Even when the dam operates as intended, downstream flooding can still occur in a very large rainfall event. This event could require unusually large quantities of water to be released through the dam gates and emergency spillway. \n\nThe primary consequence center is Wayne, WV, located 13 river miles downstream of East Lynn Dam. There are no dams downstream of East Lynn Dam but there is a levee system located at the confluence of Twelvepole Creek and the Ohio River. The Ceredo-Kenova levee, located 42 river miles downstream of the dam, would not be overtopped by the total peak outflow from the dam for the probable maximum flood (PMF) event. This means that the levee would be able to protect the surrounding area from flooding in the event of a PMF.", "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. More detail related to this specific dam will be added at a future time.", "riverName":"EAST FK TWELVEPOLE CREEK", "separateStructuresCount":0, "sourceAgency":"US Army Corps of Engineers", "spillwayTypeId":3, "spillwayWidth":230, "stateFedId":"WV09901", "stateRegulatoryAgency":null, "stateRegulatedId":0, "structuralHeight":113, "submitDate":"2023-11-28T18:12:18.627Z", "surfaceArea":1005, "volume":1074000, "widthOfLocks":0, "secondaryWidthOfLocks":null, "yearCompleted":1971, "congDist":"Congressional District 01, West Virginia", "city":"EAST LYNN", "county":"Wayne", "aiannh":null, "websiteUrl":"https://www.lrh.usace.army.mil/Missions/Civil-Works/Dam-Safety-Program/", "coreTypeIds":"3", "damTypeIds":"8", "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":"East Lynn Lake", "ownerNames":"USACE - Huntington District", "ownerTypeIds":"3", "primaryDamTypeId":8, "primaryOwnerTypeId":3, "primaryPurposeId":9, "purposeIds":"9;4;5", "dsacId":5, "femaRegion":"3", "lastEapExcerDate":"2024-07-25T12:00:00.000Z", "dataUpdated":"2025-07-15T12:00:00.000Z", "usaceDistrict":"Huntington District", "noConsequencesId":0, "secretaryAgricultureBuiltId":null, "nrcsWatershedAuthorizationId":null, "isAssociatedStructureId":"No", "fedRegulatedId":"Yes", "inundationNidAddedId":1, "damStatusId":2, "huc06":"050901", "doi_region":null, "doi_region_name":"North Atlantic-Appalachian", "doi_region_number":1, "thirtyYearAverage":21.9031, "tenthPercentile":18.141, "ninetiethPercentile":24.5282 }, "id":1014108, "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/1014108?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/1014108?f=jsonld" }, { "rel":"alternate", "type":"text/html", "title":"This document as HTML", "href":"https://api.wwdh.internetofwater.app/collections/usace-edr/items/1014108?f=html" }, { "rel":"collection", "type":"application/json", "title":"USACE Access2Water API", "href":"https://api.wwdh.internetofwater.app/collections/usace-edr" } ] }