{ "bbox":null, "type":"Feature", "geometry":{ "bbox":null, "type":"Point", "coordinates":[ -90.12444, 34.75722 ] }, "properties":{ "provider":"MVK", "code":"Arkabutla Lake", "slug":"arkabutla%20lake", "elevation":0.0, "horizontal_datum":"NAD27", "vertical_datum":"NGVD29", "state":"MS", "kind":"PROJECT", "nearest_city":"Southaven", "public_name":"Arkabutla Lake", "location_code":120013, "nsid":null, "aliases":{ "NIDID":"MS01496", "SHEF Location ID":"CE40794C", "DCP Platform ID":"CE40794C", "CWMS Legacy Naming":"Arkabutla Lake", "CWMS Standard Naming":"Arkabutla Lake" }, "timeseries":[ { "tsid":"Arkabutla 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":220.0, "delta24h":null, "sort_order":2, "results":null }, { "tsid":"Arkabutla Lake-Tailwater.Elev.Inst.1Hour.0.DCP-rev", "label":"Elevation Tailwater", "base_parameter":"Elev", "parameter":"Elev", "unit":"ft", "unit_long_name":"Feet", "latest_time":"2026-08-25T22:00:00Z", "latest_value":166.93, "delta24h":null, "sort_order":3, "results":null }, { "tsid":"Arkabutla Lake-Tailwater.Stage.Inst.1Hour.0.DCP-rev", "label":"Stage Tailwater", "base_parameter":"Stage", "parameter":"Stage", "unit":"ft", "unit_long_name":"Feet", "latest_time":"2026-08-25T22:00:00Z", "latest_value":166.93, "delta24h":null, "sort_order":5, "results":null }, { "tsid":"Arkabutla 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":"2026-08-25T22:00:00Z", "latest_value":23132.0, "delta24h":null, "sort_order":13, "results":null }, { "tsid":"Arkabutla 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":"2026-08-25T22:00:00Z", "latest_value":0.0, "delta24h":null, "sort_order":8, "results":null }, { "tsid":"Arkabutla Lake.Elev.Inst.1Hour.0.DCP-rev", "label":"Elevation", "base_parameter":"Elev", "parameter":"Elev", "unit":"ft", "unit_long_name":"Feet", "latest_time":"2026-08-25T22:00:00Z", "latest_value":207.44, "delta24h":null, "sort_order":1, "results":null }, { "tsid":"Arkabutla 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":"2026-08-25T22:00:00Z", "latest_value":0.0, "delta24h":null, "sort_order":7, "results":null }, { "tsid":"Arkabutla 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":"2026-08-25T21:00:00Z", "latest_value":245.03, "delta24h":null, "sort_order":6, "results":null }, { "tsid":"Arkabutla 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":"2026-08-25T22:00:00Z", "latest_value":23132.0, "delta24h":null, "sort_order":11, "results":null } ], "name":"Arkabutla Lake", "hasResopsAverages":"true", "nidId":"MS01496", "nidid":"", "levels":[ { "slug":"elev.bottom of flood control", "label":"Bottom of Flood Control", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Arkabutla Lake.Elev.Inst.0.Bottom of Flood Control", "latest_value":209.3, "units":"ft", "units_long_name":"Feet", "type":"CONSTANT" }, { "slug":"elev.streambed", "label":"Streambed", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Arkabutla Lake.Elev.Inst.0.Streambed", "latest_value":189.3, "units":"ft", "units_long_name":"Feet", "type":"CONSTANT" }, { "slug":"elev.top of conservation", "label":"Top of Conservation", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Arkabutla Lake.Elev.Inst.0.Top of Conservation", "latest_value":209.3, "units":"ft", "units_long_name":"Feet", "type":"CONSTANT" }, { "slug":"elev.top of dam", "label":"Top of Dam", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Arkabutla Lake.Elev.Inst.0.Top of Dam", "latest_value":264.3, "units":"ft", "units_long_name":"Feet", "type":"CONSTANT" }, { "slug":"elev.top of flood", "label":"Top of Flood", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Arkabutla Lake.Elev.Inst.0.Top of Flood", "latest_value":238.3, "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":"Arkabutla Lake.Elev.Inst.0.Top of Flood Control", "latest_value":238.3, "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":"Arkabutla Lake.Elev.Inst.0.Top of Guide Curve", "latest_value":220, "units":"ft", "units_long_name":"Feet", "type":"REGULAR" }, { "slug":"elev.top of inactive", "label":"Top of Inactive", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Arkabutla Lake.Elev.Inst.0.Top of Inactive", "latest_value":191.3, "units":"ft", "units_long_name":"Feet", "type":"CONSTANT" }, { "slug":"elev.top of surcharge", "label":"Top of Surcharge", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Arkabutla Lake.Elev.Inst.0.Top of Surcharge", "latest_value":256.3, "units":"ft", "units_long_name":"Feet", "type":"CONSTANT" }, { "slug":"stor.streambed", "label":"Streambed", "parameter":"Stor", "base_parameter":"Stor", "tsid":"Arkabutla 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":"Arkabutla Lake.Stor.Inst.0.Top of Conservation", "latest_value":31500, "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":"Arkabutla Lake.Stor.Inst.0.Top of Dam", "latest_value":1951200, "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":"Arkabutla Lake.Stor.Inst.0.Top of Flood Control", "latest_value":525300, "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":"Arkabutla Lake.Stor.Inst.0.Top of Surcharge", "latest_value":1383100, "units":"ac-ft", "units_long_name":"Acre-feet", "type":"CONSTANT" } ], "id":550303, "associatedStructuresCount":0, "conditionAssessDate":null, "conditionAssessDetail":null, "conditionAssessId":6, "damHeight":85, "damLength":10700, "distance":13, "drainageArea":1000, "eapId":1, "dsacAssignedDate":"2024-11-12T12:00:00.000Z", "eapMeetsGuidelinesId":1, "emergencyContactsUpdated":"2024-10-23T12:00:00.000Z", "eapLastRevDate":"2021-06-21T12:00:00.000Z", "enforcementAuthorityId":1, "federalId":"MS01496", "oldFederalId":"MS01496", "hazardId":4, "hydraulicHeight":84, "inspectionAuthorityId":1, "inspectionDate":"2025-04-09T12:00:00.000Z", "inspectionFrequency":5, "jurisdictionAuthorityId":1, "latitude":34.759213946, "lengthOfLocks":0, "secondaryLengthOfLocks":null, "longitude":-90.123745353, "maxDischarge":111000, "maxStorage":1383800, "nidHeight":92, "nidStorage":1383800, "normalStorage":31500, "numberOfLocks":0, "operationalStatusDate":"2022-05-24T12:00:00.000Z", "operationalStatusId":2, "originalDesignerName":null, "otherStructureId":null, "permittingAuthorityId":1, "politicalPartyId":null, "privateDamId":null, "projectDescription":"The U.S. Army Corps of Engineers (USACE) completed Arkabutla Dam in 1943 and continues to own, operate, and maintain the facility today. Located across the Coldwater River, the dam helps control flooding along the Yazoo River Basin for more than 18,000 residents and more than 7,000 homes and businesses totaling nearly $700 Million. The dam also provides water-based and other outdoor recreation opportunities. The 85-foot-tall, earthen-filled dam is located four miles north of Arkabutla, Mississippi, and is approximately 10,700 feet (over 2 miles) long. \nUnder normal conditions, Arkabutla Dam and Reservoir is managed throughout the year to store and slowly release water to help keep the Coldwater River within its banks and to reduce the peak flow of rainfall runoff. The lake is drawn down during the fall and winter to provide needed storage during periods of prevalent rainfall. The lake is filled during the spring and summer to provide recreational opportunities to the visiting public. This management is in accordance with the project\u2019s congressionally authorized Water Control Plan. \nReservoir water is released into the Coldwater River through a concrete tunnel in the dam controlled by 3 large gates. These gates can release enough water to fill an Olympic-sized swimming pool in nine seconds. The dam\u2019s overflow spillway is located on its north side and is designed to pass high volumes of flood waters to prevent the dam from being overtopped and potentially breached. On rare occasions when the spillway is activated, the water passes over a concrete rim and down a 300-foot wide concrete slope into the spillway outlet channel and eventually back into the Coldwater River. This overflow spillway can release enough water to fill an Olympic-sized swimming pool in one second. Arkabutla Lake has flowed over the overflow spillway thirteen times since the dam was constructed, with the most recent overflow occurring in 2019.\n*Update\t\nA 2023 declaration of emergency at Arkabutla Dam has temporarily altered the way that the reservoir is being managed. Due to the dam\u2019s critical condition, the reservoir has been drawn down to elevation 204 ft to reduce the risk of dam failure and minimize impacts to downstream populations. This water level is 6 ft lower than what is generally held during winter pool levels, and this level will be maintained throughout the whole year until permanent repairs can be installed.", "riskCharSummary":"While Arkabutla Dam greatly reduces flood risks downstream, it does not eliminate these risks. Flooding can still occur even if Arkabutla Dam operates as designed. Unlikely but possible storm scenarios exist that could cause more rainfall than Arkabutla Dam can safely store. To pass such a large amount of water, the dam gates may need to be fully opened; and the dam\u2019s overflow spillway may activate to pass extreme flow events to keep Arkabutla Dam from overtopping and potentially breaching. If the overflow spillway were to activate due to a major storm, two-to-six feet of water could flood the Mississippi Delta as far west as Tunica and as far south as Greenwood and Indianola. This water would likely flood farm fields and low-lying areas. As much as six-to-fifteen feet of water could be expected near the Coldwater River in Tunica County along MS Hwy 3 with two-to-six feet of water expected near the Coldwater, Tallahatchie, and Yazoo Rivers in Quitman, Tallahatchie, and Leflore Counties. While weather can be unpredictable, overflow spillway events can often be forecasted one-to-two days before flooding begins to impact communities. USACE is in routine communication with the National Weather Service (NWS) and the Mississippi Emergency Management Agency (MEMA) to ensure the proper precautions are taken.\nIn 2023, Arkabutla Dam was re-assessed for any concerns that might cause the dam to fail after a moderate sized sinkhole was discovered on the downstream toe of the dam, adjacent to the outlet tunnel and toe road. USACE re-classified the risks of failure associated with Arkabutla Dam from moderate to very high due to heightened concerns of foundation material loss under the outlet works, and historic seepage issues into the tunnel. If enough foundation material is lost, the toe could collapse, causing the top of the dam to fall downward, allowing the reservoir to overtop the dam. USACE is currently taking measures to reduce the risk of failure, which are summarized in the \u201cRisk Management\u201d paragraph below. \nIf Arkabutla Dam breached or failed, flood waters would be deep and swift enough to damage and destroy houses, buildings, roads, bridges, and power and water supplies and even cause loss of life. The impacts of the dam\u2019s failure would be extensive throughout the Mississippi Delta region. The flooded area would be similar in size to the area impacted by the Yazoo Backwater Flood in 2019. In the unlikely event that Arkabutla Dam breaches, follow all directions from emergency officials, including evacuation orders. Failure to do so puts you and your family\u2019s lives at risk. To prepare your family against possible flooding, please visit the National Inventory of Dams (NID) website to see maps showing the potential extent of flooding locations if Arkabutla Dam were to breach.", "riskManagementMeasures":"In 2023, a large depression formed at the downstream toe of the dam, near the outlet tunnel and toe road. After investigation, the sinkhole was found to be caused by material loss underneath the dam through the outlet works, which is a serious concern. If the foundation material loss was allowed to continue without mitigation, the dam could fail. The Vicksburg District acted by lowering Arkabutla Lake, which in turn reduces the amount of material loss and reduces downstream impacts if the dam were to fail. USACE also declared a Dam Safety Emergency on May 9, 2023, which heightened public awareness of the issues at the dam. The lake will continue to be held at lower pool stages until a final repair can be implemented, which could take many years. \nIn the meantime, USACE has implemented Phase I of smaller interim repairs that will reduce breach risks immediately. These repairs consist of stopping material loss by closing off a deteriorated drainage feature and replacing it with new relief wells. Multiple automated groundwater monitoring devices were installed in the embankment which allow engineers to monitor subsurface flow conditions in real time which reduces reaction time to changing conditions. Phase II interim repairs will include foundation stabilization of the outlet works and tunnel which are expected to be implemented in the summer of 2025. While these interim repairs do reduce breach risks quickly, they do not reduce risks to an acceptable level, which is why the lake will remain lowered until USACE can verify that the dam is safe to return to normal operation.\nArkabutla Dam has also had multiple instances where material has been found to be piping through the joints of the tunnel. If enough foundation material is lost through the tunnel, it could cause the tunnel to shift, creating an open void for flow and foundation material to move through. USACE has grouted the problematic joints 13 times since the dam built in 1943. USACE routinely inspects the tunnel when reservoir conditions permit which allows for fast response to degrading joint condition. \nFull repairs for both the tunnel and the outlet works will be designed through a study that has already been initiated, called a Dam Safety Modification Study. This study looks at a permanent, robust, and resilient design that will greatly reduce risks over the entirety of the project. This design could be very expensive and may take many years to fund construction. Once constructed, the dam will be put back into its normal operation and will be managed for all of its congressionally authorized benefits, including flood control and recreation. \nUSACE coordinates closely with the National Weather Service (NWS), the U.S. Geologic Survey (USGS), the National Oceanic and Atmospheric Administration (NOAA), and the Mississippi Emergency Management Agency (MEMA) concerning conditions both upstream and downstream of the dam. USACE continues to work with these agencies to prepare and practice for emergency response efforts related to Arkabutla Dam. Close coordination with local and state emergency management officials allows agency personnel to act in a timely manner during an emergency.\nDuring high-water events, USACE dam safety professionals increase surveillance of the dam to 24 hours a day and are prepared to act if an issue occurs. USACE personnel also monitor river conditions to help optimize the dam\u2019s operations.", "riverName":"COLDWATER RIVER", "separateStructuresCount":0, "sourceAgency":"US Army Corps of Engineers", "spillwayTypeId":3, "spillwayWidth":300, "stateFedId":"MS01496", "stateRegulatoryAgency":"MS DEPARTMENT OF ENVIRONMENTAL QUALITY", "stateRegulatedId":1, "structuralHeight":92, "submitDate":"2023-02-16T17:25:37.208Z", "surfaceArea":5100, "volume":4700000, "widthOfLocks":0, "secondaryWidthOfLocks":null, "yearCompleted":1943, "congDist":"Congressional District 01, Mississippi", "city":"TUNICA", "county":"DeSoto", "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":"Arkabutla Lake", "ownerNames":"USACE - Vicksburg District", "ownerTypeIds":"3", "primaryDamTypeId":8, "primaryOwnerTypeId":3, "primaryPurposeId":9, "purposeIds":"9;5", "dsacId":1, "femaRegion":"4", "lastEapExcerDate":"2024-02-09T12:00:00.000Z", "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":179.7806, "tenthPercentile":138.9646, "ninetiethPercentile":249.11 }, "id":120013, "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/120013?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/120013?f=jsonld" }, { "rel":"alternate", "type":"text/html", "title":"This document as HTML", "href":"https://api.wwdh.internetofwater.app/collections/usace-edr/items/120013?f=html" }, { "rel":"collection", "type":"application/json", "title":"USACE Access2Water API", "href":"https://api.wwdh.internetofwater.app/collections/usace-edr" } ] }