{ "bbox":null, "type":"Feature", "geometry":{ "bbox":null, "type":"Point", "coordinates":[ -82.7292, 37.7356 ] }, "properties":{ "provider":"LRH", "code":"Dewey", "slug":"dewey", "elevation":null, "horizontal_datum":"WGS84", "vertical_datum":"", "state":"KY", "kind":"PROJECT", "nearest_city":"Van Lear", "public_name":"Dewey Lake", "location_code":45108, "nsid":null, "aliases":{ "Local Loc ID":"DWJ", "NIDID":"KY03029" }, "timeseries":[ { "tsid":"Dewey-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":10251.67, "delta24h":null, "sort_order":11, "results":null }, { "tsid":"Dewey-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":2.42, "delta24h":null, "sort_order":5, "results":null }, { "tsid":"Dewey-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":60.5, "delta24h":null, "sort_order":17, "results":null }, { "tsid":"Dewey-Lake.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 }, { "tsid":"Dewey-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":649.64, "delta24h":null, "sort_order":2, "results":null }, { "tsid":"Dewey-Outflow.Elev.Inst.15Minutes.0.OBS", "label":"Elevation Tailwater", "base_parameter":"Elev", "parameter":"Elev", "unit":"ft", "unit_long_name":"Feet", "latest_time":"2026-04-14T22:30:00Z", "latest_value":599.72, "delta24h":null, "sort_order":3, "results":null }, { "tsid":"Dewey-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":11.18, "delta24h":null, "sort_order":7, "results":null }, { "tsid":"Dewey-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":10251.67, "delta24h":null, "sort_order":13, "results":null }, { "tsid":"Dewey-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":646.28, "delta24h":null, "sort_order":1, "results":null }, { "tsid":"Dewey-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":119.16, "delta24h":null, "sort_order":6, "results":null } ], "name":"Dewey Lake", "hasResopsAverages":"true", "nidId":"KY03029", "nidid":"", "levels":[ { "slug":"elev.bottom of flood", "label":"Bottom of Flood", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Dewey.Elev.Inst.0.Bottom of Flood", "latest_value":650, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.bottom of normal", "label":"Bottom of Normal", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Dewey.Elev.Inst.0.Bottom of Normal", "latest_value":644.3, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.streambed", "label":"Streambed", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Dewey.Elev.Inst.0.Streambed", "latest_value":600, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of dam", "label":"Top of Dam", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Dewey.Elev.Inst.0.Top of Dam", "latest_value":718, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of flood", "label":"Top of Flood", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Dewey.Elev.Inst.0.Top of Flood", "latest_value":686, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of flood threat", "label":"Top of Flood Threat", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Dewey.Elev.Inst.0.Top of Flood Threat", "latest_value":670, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of inactive", "label":"Top of Inactive", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Dewey.Elev.Inst.0.Top of Inactive", "latest_value":608.25, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of normal", "label":"Top of Normal", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Dewey.Elev.Inst.0.Top of Normal", "latest_value":649.98, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of record", "label":"Top of Record", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Dewey.Elev.Inst.0.Top of Record", "latest_value":682.32, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of recreation", "label":"Top of Recreation", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Dewey.Elev.Inst.0.Top of Recreation", "latest_value":650, "units":"ft", "units_long_name":"Feet" }, { "slug":"stor.bottom of flood", "label":"Bottom of Flood", "parameter":"Stor", "base_parameter":"Stor", "tsid":"Dewey.Stor.Inst.0.Bottom of Flood", "latest_value":13901.6, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of dam", "label":"Top of Dam", "parameter":"Stor", "base_parameter":"Stor", "tsid":"Dewey.Stor.Inst.0.Top of Dam", "latest_value":241448, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of flood", "label":"Top of Flood", "parameter":"Stor", "base_parameter":"Stor", "tsid":"Dewey.Stor.Inst.0.Top of Flood", "latest_value":90001, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of inactive", "label":"Top of Inactive", "parameter":"Stor", "base_parameter":"Stor", "tsid":"Dewey.Stor.Inst.0.Top of Inactive", "latest_value":3.66, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of normal", "label":"Top of Normal", "parameter":"Stor", "base_parameter":"Stor", "tsid":"Dewey.Stor.Inst.0.Top of Normal", "latest_value":13814.03, "units":"ac-ft", "units_long_name":"Acre-feet" } ], "id":550344, "associatedStructuresCount":1, "conditionAssessDate":null, "conditionAssessDetail":null, "conditionAssessId":6, "damHeight":null, "damLength":913, "distance":6, "drainageArea":206, "eapId":1, "dsacAssignedDate":"2024-07-13T12:00:00.000Z", "eapMeetsGuidelinesId":1, "emergencyContactsUpdated":"2024-01-26T12:00:00.000Z", "eapLastRevDate":"2011-06-16T12:00:00.000Z", "enforcementAuthorityId":0, "federalId":"KY03029", "oldFederalId":"KY03029", "hazardId":4, "hydraulicHeight":86, "inspectionAuthorityId":0, "inspectionDate":"2023-07-19T12:00:00.000Z", "inspectionFrequency":5, "jurisdictionAuthorityId":0, "latitude":37.7368230000001, "lengthOfLocks":0, "secondaryLengthOfLocks":null, "longitude":-82.729211, "maxDischarge":22800, "maxStorage":93300, "nidHeight":118, "nidStorage":93300, "normalStorage":17200, "numberOfLocks":0, "operationalStatusDate":"2009-05-12T12:00:00.000Z", "operationalStatusId":1, "originalDesignerName":null, "otherStructureId":null, "permittingAuthorityId":0, "politicalPartyId":null, "privateDamId":null, "projectDescription":"The U.S. Army Corps of Engineers completed the construction of Dewey Dam and Brandykeg Dike in 1950. The project was authorized by the Flood Control Act of 1938 and is designed for flood control, recreation, and fish and wildlife enhancement. Dewey Dam is a high hazard potential dam on Johns Creek located approximately 5.4 miles upstream of its confluence with the Levisa Fork of the Big Sandy River, approximately 14 river miles upstream of Paintsville, Kentucky, and 13 river miles downstream of Prestonsburg, Kentucky. \n\nDewey Dam is an earth-fill embankment dam with a maximum height of 118 feet and length of 913 feet. One unregulated emergency spillway is located to the left of the dam (looking downstream). Another unregulated emergency spillway is located 4 miles upstream of the dam. Water would pass through these during extreme flood events to prevent the dam from overtopping. Flood damages prevented by Dewey Dam are about $1.4 billion over the project life (from 1949 to 2021) and average about $22.4 million annually. Like most high hazard potential dams that the U. S. Army Corps of Engineers manage, a breach of Dewey Dam would lead to loss of life and/or high economic impacts downstream.", "riskCharSummary":"Dewey Dam and Brandykeg Dike significantly reduce the risk of flooding to surrounding communities. However, they do not eliminate the risk entirely. Although the dam and dike have historically performed well, extreme rainfall events may cause areas downstream to be flooded. Even when the dam and dike operate 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 spillways. In extreme cases, this flooding could be like what was experienced prior to the dam's construction. \n\nThe U.S. Army Corps of Engineers completed a risk assessment for Dewey Dam and Brandykeg Dike in 2023 and classified the risk associated with failure as Low and Very Low, respectively. The risk categorization is based on the risk of rare storm events occurring which would cause more rainfall than the dam can store safely. During such an event, the activation of both spillways would be necessary to prevent the dam from overtopping or potentially breaching. \n\nWhile the spillways have never flowed, operation of one or both of them could result in significant damages to houses, buildings, factories, roads, bridges, power, and water supply. Critical infrastructure, including roadways (evacuation routes) and bridges along Johns Creek, Levisa Fork, and the Big Sandy River may not be passable due to high flood waters during spillway flows.\n\nAlthough the odds of such a storm event occurring are considered extremely unlikely, Dewey Dam has an Emergency Action Plan to outline personnel responses to anticipated emergency scenarios. In the unlikely event this occurs, follow all directions from emergency officials, including evacuation orders. Failure to do so puts you and your family\u2019s lives at risk.", "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 Dewey Dam and Brandykeg Dike. The project is well-maintained through continuous operations and maintenance activities, and the U.S. Army Corps of Engineers conducts detailed inspections of the dam and dike 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. Conducting emergency exercises and dam safety training with U.S. Army Corps of Engineers staff and local and state emergency responders supports and strengthens risk management and successful emergency response actions. Additionally, the dam\u2019s Emergency Action Plan is routinely updated and flood fighting materials are stored on site to improve the ability to successfully respond in an emergency.", "riverName":"JOHNS CREEK OF LEVISA FORK", "separateStructuresCount":1, "sourceAgency":"US Army Corps of Engineers", "spillwayTypeId":3, "spillwayWidth":60, "stateFedId":"KY03029", "stateRegulatoryAgency":null, "stateRegulatedId":0, "structuralHeight":118, "submitDate":"2023-11-28T22:23:20.499Z", "surfaceArea":1100, "volume":760000, "widthOfLocks":0, "secondaryWidthOfLocks":null, "yearCompleted":1949, "congDist":"Congressional District 05, Kentucky", "city":"PAINTSVILLE", "county":"Floyd", "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":"3", "nonFederalDamOnFederalId":0, "designerNames":"CELRH", "otherNames":"Dewey Lake", "ownerNames":"USACE - Huntington District", "ownerTypeIds":"3", "primaryDamTypeId":8, "primaryOwnerTypeId":3, "primaryPurposeId":9, "purposeIds":"9;4;5", "dsacId":4, "femaRegion":"4", "lastEapExcerDate":"2024-11-04T12:00:00.000Z", "dataUpdated":"2025-03-11T12:00:00.000Z", "usaceDistrict":"Huntington District", "noConsequencesId":0, "secretaryAgricultureBuiltId":null, "nrcsWatershedAuthorizationId":null, "isAssociatedStructureId":"No", "fedRegulatedId":"Yes", "inundationNidAddedId":1, "damStatusId":2, "huc06":"050702", "doi_region":null, "doi_region_name":"North Atlantic-Appalachian", "doi_region_number":1, "thirtyYearAverage":20.3651, "tenthPercentile":17.0628, "ninetiethPercentile":21.3802 }, "id":45108, "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/45108?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/45108?f=jsonld" }, { "rel":"alternate", "type":"text/html", "title":"This document as HTML", "href":"https://api.wwdh.internetofwater.app/collections/usace-edr/items/45108?f=html" }, { "rel":"collection", "type":"application/json", "title":"USACE Access2Water API", "href":"https://api.wwdh.internetofwater.app/collections/usace-edr" } ] }