{ "bbox":null, "type":"Feature", "geometry":{ "bbox":null, "type":"Point", "coordinates":[ -89.9038, 34.15796 ] }, "properties":{ "provider":"MVK", "code":"Enid Lake", "slug":"enid%20lake", "elevation":0.0, "horizontal_datum":"NAD27", "vertical_datum":"NGVD29", "state":"MS", "kind":"PROJECT", "nearest_city":"Grenada", "public_name":"Enid Lake ", "location_code":342013, "nsid":null, "aliases":{ "NIDID":"MS01495", "SHEF Location ID":"CE417564", "DCP Platform ID":"CE417564", "CWMS Legacy Naming":"Enid Lake", "CWMS Standard Naming":"Enid Lake" }, "timeseries":[ { "tsid":"Enid Lake-Tailwater.Elev.Inst.1Hour.0.DCP-rev", "label":"Elevation Tailwater", "base_parameter":"Elev", "parameter":"Elev", "unit":"ft", "unit_long_name":"Feet", "latest_time":"2026-08-25T21:00:00Z", "latest_value":190.83, "delta24h":null, "sort_order":3, "results":null }, { "tsid":"Enid Lake.Stor.Inst.1Hour.0.DCP-rev", "label":"Flood Storage", "base_parameter":"Stor", "parameter":"Stor", "unit":"ac-ft", "unit_long_name":"Acre-feet", "latest_time":"2026-08-25T21:00:00Z", "latest_value":234313.99, "delta24h":null, "sort_order":11, "results":null }, { "tsid":"Enid Lake.Flow.Inst.1Hour.0.Total Gate Flow", "label":"Outflow", "base_parameter":"Flow", "parameter":"Flow", "unit":"cfs", "unit_long_name":"Cubic feet per second", "latest_time":"2026-08-25T21:00:00Z", "latest_value":326.02, "delta24h":null, "sort_order":7, "results":null }, { "tsid":"Enid Lake.Stor.Inst.1Hour.0.DCP-rev", "label":"Conservation Storage", "base_parameter":"Stor", "parameter":"Stor", "unit":"ac-ft", "unit_long_name":"Acre-feet", "latest_time":"2026-08-25T21:00:00Z", "latest_value":234313.99, "delta24h":null, "sort_order":13, "results":null }, { "tsid":"Enid Lake.Elev.Inst.1Hour.0.DCP-rev", "label":"Elevation", "base_parameter":"Elev", "parameter":"Elev", "unit":"ft", "unit_long_name":"Feet", "latest_time":"2026-08-25T21:00:00Z", "latest_value":247.67, "delta24h":null, "sort_order":1, "results":null }, { "tsid":"Enid Lake.Flow-In.Ave.1Hour.0.24 Hour Average", "label":"Inflow", "base_parameter":"Flow", "parameter":"Flow-In", "unit":"cfs", "unit_long_name":"Cubic feet per second", "latest_time":"2026-08-25T20:00:00Z", "latest_value":111.33, "delta24h":null, "sort_order":6, "results":null }, { "tsid":"Enid Lake.Elev.Inst.1Hour.0.Guide Curve", "label":"Elevation Rule Curve", "base_parameter":"Elev", "parameter":"Elev", "unit":"ft", "unit_long_name":"Feet", "latest_time":"2026-08-26T00:00:00Z", "latest_value":246.95, "delta24h":null, "sort_order":2, "results":null }, { "tsid":"Enid Lake.Precip.Inst.1Hour.0.DCP-rev", "label":"Precipitation", "base_parameter":"Precip", "parameter":"Precip", "unit":"in", "unit_long_name":"Inches", "latest_time":"2026-08-25T21:00:00Z", "latest_value":1.03, "delta24h":null, "sort_order":16, "results":null }, { "tsid":"Enid Lake-Tailwater.Stage.Inst.1Hour.0.DCP-rev", "label":"Stage Tailwater", "base_parameter":"Stage", "parameter":"Stage", "unit":"ft", "unit_long_name":"Feet", "latest_time":"2026-08-25T21:00:00Z", "latest_value":190.83, "delta24h":null, "sort_order":5, "results":null }, { "tsid":"Enid Lake-Spillway.Flow.Inst.1Hour.0.Spillway Flow", "label":"Surcharge Release", "base_parameter":"Flow", "parameter":"Flow", "unit":"cfs", "unit_long_name":"Cubic feet per second", "latest_time":"2026-08-25T21:00:00Z", "latest_value":0.0, "delta24h":null, "sort_order":8, "results":null } ], "name":"Enid Lake ", "hasResopsAverages":"true", "nidId":"MS01495", "nidid":"", "levels":[ { "slug":"elev.streambed", "label":"Streambed", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Enid Lake.Elev.Inst.0.Streambed", "latest_value":194, "units":"ft", "units_long_name":"Feet", "type":"CONSTANT" }, { "slug":"elev.top of conservation", "label":"Top of Conservation", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Enid Lake.Elev.Inst.0.Top of Conservation", "latest_value":230, "units":"ft", "units_long_name":"Feet", "type":"CONSTANT" }, { "slug":"elev.top of dam", "label":"Top of Dam", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Enid Lake.Elev.Inst.0.Top of Dam", "latest_value":293, "units":"ft", "units_long_name":"Feet", "type":"CONSTANT" }, { "slug":"elev.top of flood control", "label":"Top of Flood Control", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Enid Lake.Elev.Inst.0.Top of Flood Control", "latest_value":268, "units":"ft", "units_long_name":"Feet", "type":"CONSTANT" }, { "slug":"elev.top of guide curve", "label":"Top of Guide Curve", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Enid Lake.Elev.Inst.0.Top of Guide Curve", "latest_value":247.16, "units":"ft", "units_long_name":"Feet", "type":"REGULAR" }, { "slug":"elev.top of inactive", "label":"Top of Inactive", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Enid Lake.Elev.Inst.0.Top of Inactive", "latest_value":205, "units":"ft", "units_long_name":"Feet", "type":"CONSTANT" }, { "slug":"elev.top of surcharge", "label":"Top of Surcharge", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Enid Lake.Elev.Inst.0.Top of Surcharge", "latest_value":284, "units":"ft", "units_long_name":"Feet", "type":"CONSTANT" }, { "slug":"stor.streambed", "label":"Streambed", "parameter":"Stor", "base_parameter":"Stor", "tsid":"Enid Lake.Stor.Inst.0.Streambed", "latest_value":0, "units":"ac-ft", "units_long_name":"Acre-feet", "type":"CONSTANT" }, { "slug":"stor.top of conservation", "label":"Top of Conservation", "parameter":"Stor", "base_parameter":"Stor", "tsid":"Enid Lake.Stor.Inst.0.Top of Conservation", "latest_value":57570, "units":"ac-ft", "units_long_name":"Acre-feet", "type":"CONSTANT" }, { "slug":"stor.top of dam", "label":"Top of Dam", "parameter":"Stor", "base_parameter":"Stor", "tsid":"Enid Lake.Stor.Inst.0.Top of Dam", "latest_value":1625400, "units":"ac-ft", "units_long_name":"Acre-feet", "type":"CONSTANT" }, { "slug":"stor.top of flood control", "label":"Top of Flood Control", "parameter":"Stor", "base_parameter":"Stor", "tsid":"Enid Lake.Stor.Inst.0.Top of Flood Control", "latest_value":660000, "units":"ac-ft", "units_long_name":"Acre-feet", "type":"CONSTANT" }, { "slug":"stor.top of surcharge", "label":"Top of Surcharge", "parameter":"Stor", "base_parameter":"Stor", "tsid":"Enid Lake.Stor.Inst.0.Top of Surcharge", "latest_value":1213500, "units":"ac-ft", "units_long_name":"Acre-feet", "type":"CONSTANT" } ], "id":550302, "associatedStructuresCount":0, "conditionAssessDate":null, "conditionAssessDetail":null, "conditionAssessId":6, "damHeight":85, "damLength":8400, "distance":14, "drainageArea":560, "eapId":1, "dsacAssignedDate":"2014-05-06T12:00:00.000Z", "eapMeetsGuidelinesId":1, "emergencyContactsUpdated":"2021-01-22T12:00:00.000Z", "eapLastRevDate":"1987-07-30T12:00:00.000Z", "enforcementAuthorityId":1, "federalId":"MS01495", "oldFederalId":"MS01495", "hazardId":4, "hydraulicHeight":85, "inspectionAuthorityId":1, "inspectionDate":"2023-05-30T12:00:00.000Z", "inspectionFrequency":5, "jurisdictionAuthorityId":1, "latitude":34.1499540190001, "lengthOfLocks":0, "secondaryLengthOfLocks":null, "longitude":-89.905811962, "maxDischarge":49700, "maxStorage":1213500, "nidHeight":110, "nidStorage":1213500, "normalStorage":57600, "numberOfLocks":0, "operationalStatusDate":"2014-05-06T12:00:00.000Z", "operationalStatusId":1, "originalDesignerName":null, "otherStructureId":null, "permittingAuthorityId":1, "politicalPartyId":null, "privateDamId":null, "projectDescription":"The U.S. Army Corps of Engineers (USACE) completed Enid Dam in 1952 and continues to own, operate, and maintain the facility today. Located on the Yocona River about 12 miles south of Batesville, Mississippi, Enid Dam is one of four Yazoo Headwater Projects authorized to reduce flood risks throughout the Yazoo River Basin. The dam also supports water supply, water quality control, irrigation, fish and wildlife management, and recreational use for the surrounding region.\n\nThe rolled-earth embankment dam stands 103 feet tall and spans approximately 8,400 feet in length. Enid Lake, the reservoir created by the dam, has a storage capacity of over 1.5 million acre-feet. Water is released through two 11-foot diameter conduits, regulated by large gates located in the intake tower. These gates can release a combined maximum of 9,400 cubic feet of water per second, which would fill up an Olympic sized swimming pool in 10 seconds. An uncontrolled, broad-crested weir spillway with a capacity of nearly 50,000 cfs, which is enough flow to fill an Olympic sized swimming pool in 1.8 seconds, is located at the northern end of the dam to safely pass excess water during major flood events.\nEnid Dam is managed year-round to balance flood control and recreational use. Water levels are reduced during the fall and winter to provide storage capacity for potential storm runoff and are raised during spring and summer for public recreation. These operations follow the congressionally authorized Water Control Plan for the Yazoo Basin.", "riskCharSummary":"While Enid Dam significantly reduces the risk of flooding for downstream communities like Crowder and Greenwood, Mississippi, it cannot eliminate flood risk entirely. Extremely rare but possible storm scenarios could produce more rainfall than the dam is designed to store, potentially causing the reservoir to rise to dangerous levels.\n\nUSACE\u2019s latest Periodic Assessment, completed in 2023, evaluated the dam\u2019s performance during extreme events and identified two primary potential failure modes: overtopping of the dam during an extreme flood, and backward erosion piping (BEP) through the foundation near the outlet works.\n\nOvertopping could occur during a rare storm that pushes water levels above the dam crest, leading to erosion and breach of the embankment. The likelihood of such a failure is estimated to be very unlikely, with potential life loss if it occurs. Intervention is unlikely due to the difficulty of quickly raising or protecting more than 8,000 feet of dam embankment during an emergency.\n\nBreach through foundation could result from excessive uplift pressures and seepage through erodible foundation sands, leading to a piping failure. Relief wells have been installed to control these pressures, but aging infrastructure and unknown conditions in old wood stave wells introduce uncertainty. \n\nNon-breach risks\u2014flooding from high spillway releases without dam failure\u2014were also analyzed. While these floods do not involve dam failure, they could still inundate downstream areas and result in economic losses up to $100 million and minor loss of life.\n\nIf Enid Dam were to breach, floodwaters would rapidly impact low-lying areas in Panola County and downstream along the Yocona and Yazoo Rivers. Deep, fast-moving water could cause widespread damage to homes, infrastructure, and agriculture. Although such a failure is unlikely, USACE remains in communication with the National Weather Service (NWS) and local emergency officials to ensure communities receive timely warnings and evacuation instructions during high water events.", "riskManagementMeasures":"To reduce risk and enhance public safety, USACE has implemented several ongoing measures at Enid Dam. These include updating the Emergency Action Plan (EAP), improving risk communication with downstream communities, and increasing coordination with local Emergency Management Agencies. Routine inspections, training, and dam safety evaluations are conducted on a recurring basis. \n\nRelief wells, essential for controlling foundation seepage pressures, are maintained on a five-year treatment schedule. Additional piezometers are being installed to monitor critical areas, especially near historic sand boil sites. \nAlthough Enid Dam is currently rated as a DSAC 4\u2014indicating low urgency\u2014the Corps continues to manage it with care, ensuring the dam remains safe, reliable, and capable of performing its authorized functions.", "riverName":"YOCONA RIVER", "separateStructuresCount":0, "sourceAgency":"US Army Corps of Engineers", "spillwayTypeId":3, "spillwayWidth":200, "stateFedId":"MS01495", "stateRegulatoryAgency":"MS DEPARTMENT OF ENVIRONMENTAL QUALITY", "stateRegulatedId":1, "structuralHeight":110, "submitDate":"2023-10-04T15:56:34.207Z", "surfaceArea":6100, "volume":5873000, "widthOfLocks":0, "secondaryWidthOfLocks":null, "yearCompleted":1952, "congDist":"Congressional District 02, Mississippi", "city":"CROWDER", "county":"Yalobusha", "aiannh":null, "websiteUrl":"https://www.usace.army.mil/Missions/Civil-Works/Dam-Safety-Program/Article/2870967/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":"CEMVK", "otherNames":"Enid Lake", "ownerNames":"USACE - Vicksburg District", "ownerTypeIds":"3", "primaryDamTypeId":8, "primaryOwnerTypeId":3, "primaryPurposeId":9, "purposeIds":"9;5", "dsacId":4, "femaRegion":"4", "lastEapExcerDate":"2023-05-22T12:00:00.000Z", "dataUpdated":"2025-07-01T12:00:00.000Z", "usaceDistrict":"Vicksburg District", "noConsequencesId":0, "secretaryAgricultureBuiltId":null, "nrcsWatershedAuthorizationId":null, "isAssociatedStructureId":"No", "fedRegulatedId":"Yes", "inundationNidAddedId":1, "damStatusId":2, "huc06":"080302", "doi_region":null, "doi_region_name":"Mississippi Basin", "doi_region_number":4, "thirtyYearAverage":332.7505, "tenthPercentile":264.6214, "ninetiethPercentile":447.1358 }, "id":342013, "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/342013?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/342013?f=jsonld" }, { "rel":"alternate", "type":"text/html", "title":"This document as HTML", "href":"https://api.wwdh.internetofwater.app/collections/usace-edr/items/342013?f=html" }, { "rel":"collection", "type":"application/json", "title":"USACE Access2Water API", "href":"https://api.wwdh.internetofwater.app/collections/usace-edr" } ] }