{ "bbox":null, "type":"Feature", "geometry":{ "bbox":null, "type":"Point", "coordinates":[ -96.5716, 45.8616 ] }, "properties":{ "provider":"MVP", "code":"TraverseWR_Dam", "slug":"traversewr_dam", "elevation":900.0, "horizontal_datum":"NAD83", "vertical_datum":"LOCAL", "state":"MN", "kind":"PROJECT", "nearest_city":"Wheaton", "public_name":"White Rock Dam at Mud Lake Reservoir", "location_code":3829016, "nsid":null, "aliases":{ "USGS Station Number":"05049995", "NWS Handbook 5 ID":"WHRM5", "CWMS Legacy Naming":"TraverseWR_Dam", "CWMS Standard Naming":"TraverseWR_Dam", "NIDID":"MN00577" }, "timeseries":[ { "tsid":"TraverseWR_Dam.Elev.Inst.~15Minutes.0.best-MSL1912", "label":"Elevation", "base_parameter":"Elev", "parameter":"Elev", "unit":"ft", "unit_long_name":"Feet", "latest_time":"2026-04-14T22:30:00Z", "latest_value":972.95, "delta24h":null, "sort_order":1, "results":null }, { "tsid":"TraverseWR_Dam.Flow-Out.Inst.~15Minutes.0.best", "label":"Outflow", "base_parameter":"Flow", "parameter":"Flow-Out", "unit":"cfs", "unit_long_name":"Cubic feet per second", "latest_time":"2026-04-14T22:30:00Z", "latest_value":528.41, "delta24h":null, "sort_order":7, "results":null }, { "tsid":"TraverseWR_Dam-Tailwater.Elev.Inst.~15Minutes.0.best-MSL1912", "label":"Elevation Tailwater", "base_parameter":"Elev", "parameter":"Elev", "unit":"ft", "unit_long_name":"Feet", "latest_time":"2026-04-14T22:30:00Z", "latest_value":966.74, "delta24h":null, "sort_order":3, "results":null }, { "tsid":"TraverseWR_Dam.Flow-In.Inst.~15Minutes.0.best", "label":"Inflow", "base_parameter":"Flow", "parameter":"Flow-In", "unit":"cfs", "unit_long_name":"Cubic feet per second", "latest_time":"2026-04-14T10:30:00Z", "latest_value":433.4, "delta24h":null, "sort_order":6, "results":null } ], "name":"White Rock Dam at Mud Lake Reservoir", "hasResopsAverages":"false", "nidId":"MN00577", "nidid":"", "levels":[ { "slug":"elev.bottom of normal", "label":"Bottom of Normal", "parameter":"Elev", "base_parameter":"Elev", "tsid":"TraverseWR_Dam.Elev.Inst.0.Bottom of Normal", "latest_value":971.8, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.streambed", "label":"Streambed", "parameter":"Elev", "base_parameter":"Elev", "tsid":"TraverseWR_Dam.Elev.Inst.0.Streambed", "latest_value":965, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of conservation", "label":"Top of Conservation", "parameter":"Elev", "base_parameter":"Elev", "tsid":"TraverseWR_Dam.Elev.Inst.0.Top of Conservation", "latest_value":972, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of dam", "label":"Top of Dam", "parameter":"Elev", "base_parameter":"Elev", "tsid":"TraverseWR_Dam.Elev.Inst.0.Top of Dam", "latest_value":985, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of flood", "label":"Top of Flood", "parameter":"Elev", "base_parameter":"Elev", "tsid":"TraverseWR_Dam.Elev.Inst.0.Top of Flood", "latest_value":981, "units":"ft", "units_long_name":"Feet" }, { "slug":"stor.bottom of normal", "label":"Bottom of Normal", "parameter":"Stor", "base_parameter":"Stor", "tsid":"TraverseWR_Dam.Stor.Inst.0.Bottom of Normal", "latest_value":5840, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.streambed", "label":"Streambed", "parameter":"Stor", "base_parameter":"Stor", "tsid":"TraverseWR_Dam.Stor.Inst.0.Streambed", "latest_value":0, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of conservation", "label":"Top of Conservation", "parameter":"Stor", "base_parameter":"Stor", "tsid":"TraverseWR_Dam.Stor.Inst.0.Top of Conservation", "latest_value":1100, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of dam", "label":"Top of Dam", "parameter":"Stor", "base_parameter":"Stor", "tsid":"TraverseWR_Dam.Stor.Inst.0.Top of Dam", "latest_value":128500, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of flood", "label":"Top of Flood", "parameter":"Stor", "base_parameter":"Stor", "tsid":"TraverseWR_Dam.Stor.Inst.0.Top of Flood", "latest_value":85000, "units":"ac-ft", "units_long_name":"Acre-feet" } ], "id":550386, "associatedStructuresCount":0, "conditionAssessDate":null, "conditionAssessDetail":null, "conditionAssessId":6, "damHeight":20, "damLength":14500, "distance":30, "drainageArea":1160, "eapId":1, "dsacAssignedDate":"2009-05-12T12:00:00.000Z", "eapMeetsGuidelinesId":0, "emergencyContactsUpdated":"2024-11-14T12:00:00.000Z", "eapLastRevDate":"1995-05-01T12:00:00.000Z", "enforcementAuthorityId":0, "federalId":"MN00577", "oldFederalId":"MN00577", "hazardId":4, "hydraulicHeight":20, "inspectionAuthorityId":0, "inspectionDate":"2023-07-17T12:00:00.000Z", "inspectionFrequency":5, "jurisdictionAuthorityId":0, "latitude":45.8615596670001, "lengthOfLocks":0, "secondaryLengthOfLocks":null, "longitude":-96.573016925, "maxDischarge":5600, "maxStorage":95500, "nidHeight":33, "nidStorage":95500, "normalStorage":6500, "numberOfLocks":0, "operationalStatusDate":"2009-05-12T12:00:00.000Z", "operationalStatusId":1, "originalDesignerName":null, "otherStructureId":null, "permittingAuthorityId":0, "politicalPartyId":null, "privateDamId":null, "projectDescription":"White Rock Dam is a high hazard potential dam located on the Bois de Sioux River at the north end of Lake Traverse, near White Rock, South Dakota. The U.S. Army Corps of Engineers constructed White Rock Dam in 1939 - 1941. The flood control Act of 1936 describes Lake Traverse as a: \"Reservoir for flood protection of agricultural communities, water conservation, and other incidental benefits; special report on record in the Office of the Chief of Engineers.\" The \u2018special report\u2019 defines the project consisting of: \"a. A flood control reservoir at Lake Traverse [i.e. White Rock Dam] created by a dam across the Bois de Sioux Valley.....b. A water conservation reservoir in Lake Traverse [Reservation Dam] south of the Reservation Highway, created by the highway dike and control works at the Reservation Bridge. c. A dike at the southern end of the reservoir [Browns Valley Dike] to prevent floodwaters stored in the lake from overflowing...., and d. Channel improvement of the Bois de Sioux River downstream from the White Rock Dam for a distance of about 24 miles.\" The conservation pool is primarily maintained by Reservation dam located about 7 miles south of White Rock Dam and operated jointly as one project. White Rock Dam will store enough water to submerge Reservation Dam during large floods. Both are adjusted seasonally for recreation, fish & wildlife, water quality, water conservation, and water supply. Flood control is maximized by reservoir drawn down to provide storage for anticipated snowmelt runoff. Flood events may occur throughout the year, particularly during spring snowmelt and summer storms. The main components of the project are an earthen embankment, and a combined gated spillway and outlet structure. The earthen dam is 2-1/2 miles long and a maximum 16 feet high, and the elevation of the top of the earthen embankment is 986.6 feet NAVD88.", "riskCharSummary":"White Rock Dam is hydrologically inadequate, although the risks are low. USACE completed a Dam Safety Assurance Program (DSAP) Evaluation Report, approved December 2004. The DSAP report found that White Rock Dam can safely contain (with freeboard) only 9% of the PMF. The PMF is the current spillway design flood standard for high hazard dams used to assess project risks associated with hydrologic deficiencies. White Rock impounds a total storage capacity of about 250,000 acre-feet at flood control (elevation 981.4) and about 350,000 acre-feet at top of embankment elevation 986.6 (including water impounded above Reservation dam). The gated spillway is designed to discharge 5600 cubic feet per second at conservation pool and up to about 10,000 cfs at the embankment crest; while the peak inflow rate for the probable maximum flood (PMF) event is 179,000 cubic-feet per second. Water cannot be released fast enough to prevent the dam from overtopping during extreme events. \n\nUSACE completed a risk assessment for White Rock Dam in 2023 that characterizes the risk associated with the project as Low. The risk is primarily driven by low consequences since a dam breach would spread over the red river valley with low flood depths. Failure scenarios considered hydrologic inadequacy leading to embankment overtopping. The risk assessment considered that significant discharge may pass over the embankment without breach due to the long length of embankment, the clay embankment with paved crest is scour resistant, and tailwater effects reduce scour at the embankment toe. An incipient overtopping event is at an annual exceedance probability of about once in 800 \u2013 900 years. There is potential for overtopping discharges or breach risk considerations to complicate flood operations of the Fargo-Moorhead Flood Risk Management project that may be worth further evaluation.", "riskManagementMeasures":"To manage dam safety risks, USACE has a routine program that inspects and monitors its dams regularly and implements short- and long-term actions on a prioritized basis when unacceptable risks are found at any of its dams. The 2004 DSAP report proposed armoring the embankment for overtopping, but no remediation has been funded since consequences are small. Current hydraulic models show that life safety is only a concern at the full PMF extreme event scenario. Model estimates for loss of life are near zero for lesser flood scenarios. Life safety and economic consequences derived from inundation mapping are mostly in Breckenridge, Wahpeton, and Fargo. These communities all have flood risk management projects completed or in progress since the 2004 DSAP report. A downstream flood wave from a dam breach is attenuated quickly in the Red River floodplain.", "riverName":"BOIS DE SIOUX", "separateStructuresCount":0, "sourceAgency":"US Army Corps of Engineers", "spillwayTypeId":1, "spillwayWidth":39, "stateFedId":"MN00577", "stateRegulatoryAgency":null, "stateRegulatedId":0, "structuralHeight":33, "submitDate":"2023-02-16T17:25:31.542Z", "surfaceArea":3850, "volume":329200, "widthOfLocks":0, "secondaryWidthOfLocks":null, "yearCompleted":1941, "congDist":"Congressional District 07, Minnesota", "city":"WAHPETON", "county":"Traverse", "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":"CEMVP", "otherNames":"Mud Lake", "ownerNames":"USACE - St. Paul District", "ownerTypeIds":"3", "primaryDamTypeId":8, "primaryOwnerTypeId":3, "primaryPurposeId":9, "purposeIds":"9;12;4;5;8", "dsacId":4, "femaRegion":"5", "lastEapExcerDate":"2022-03-17T12:00:00.000Z", "dataUpdated":"2025-03-28T12:00:00.000Z", "usaceDistrict":"St. Paul District", "noConsequencesId":0, "secretaryAgricultureBuiltId":null, "nrcsWatershedAuthorizationId":null, "isAssociatedStructureId":"No", "fedRegulatedId":"Yes", "inundationNidAddedId":1, "damStatusId":2, "huc06":"090201", "doi_region":null, "doi_region_name":"Great Lakes", "doi_region_number":3 }, "id":3829016, "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/3829016?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/3829016?f=jsonld" }, { "rel":"alternate", "type":"text/html", "title":"This document as HTML", "href":"https://api.wwdh.internetofwater.app/collections/usace-edr/items/3829016?f=html" }, { "rel":"collection", "type":"application/json", "title":"USACE Access2Water API", "href":"https://api.wwdh.internetofwater.app/collections/usace-edr" } ] }