{ "bbox":null, "type":"Feature", "geometry":{ "bbox":null, "type":"Point", "coordinates":[ -98.08147, 47.03618 ] }, "properties":{ "provider":"MVP", "code":"Baldhill_Dam", "slug":"baldhill_dam", "elevation":1200.0, "horizontal_datum":"NAD83", "vertical_datum":"NGVD29", "state":"ND", "kind":"PROJECT", "nearest_city":"Valley City", "public_name":"Baldhill Dam at Lake Ashtabula", "location_code":2012016, "nsid":null, "aliases":{ "USGS Station Number":"05057500", "NWS Handbook 5 ID":"BLDN8", "CWMS Legacy Naming":"Baldhill_Dam", "CWMS Standard Naming":"Baldhill_Dam", "NIDID":"ND00309" }, "timeseries":[ { "tsid":"Baldhill_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":"2026-04-14T22:00:00Z", "latest_value":198.07, "delta24h":null, "sort_order":7, "results":null }, { "tsid":"Baldhill_Dam-Tailwater.Elev.Inst.~15Minutes.0.best-NGVD29", "label":"Elevation Tailwater", "base_parameter":"Elev", "parameter":"Elev", "unit":"ft", "unit_long_name":"Feet", "latest_time":"2026-04-14T22:00:00Z", "latest_value":1224.57, "delta24h":null, "sort_order":3, "results":null }, { "tsid":"Baldhill_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":"2026-04-14T10:00:00Z", "latest_value":502.2, "delta24h":null, "sort_order":6, "results":null }, { "tsid":"Baldhill_Dam.Stor.Ave.6Hours.6Hours.comp", "label":"Flood Storage", "base_parameter":"Stor", "parameter":"Stor", "unit":"ac-ft", "unit_long_name":"Acre-feet", "latest_time":"2026-04-14T18:00:00Z", "latest_value":59481.09, "delta24h":null, "sort_order":11, "results":null }, { "tsid":"Baldhill_Dam.Precip.Total.~1Day.1Day.Raw-NWS-ACIS", "label":"Precipitation", "base_parameter":"Precip", "parameter":"Precip", "unit":"in", "unit_long_name":"Inches", "latest_time":"2026-04-13T12:00:00Z", "latest_value":0.0, "delta24h":null, "sort_order":16, "results":null }, { "tsid":"Baldhill_Dam.Elev.Inst.~15Minutes.0.best-NGVD29", "label":"Elevation", "base_parameter":"Elev", "parameter":"Elev", "unit":"ft", "unit_long_name":"Feet", "latest_time":"2026-04-14T22:00:00Z", "latest_value":1264.84, "delta24h":null, "sort_order":1, "results":null } ], "name":"Baldhill Dam at Lake Ashtabula", "hasResopsAverages":"true", "nidId":"ND00309", "nidid":"", "levels":[ { "slug":"elev.bottom of conservation", "label":"Bottom of Conservation", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Baldhill_Dam.Elev.Inst.0.Bottom of Conservation", "latest_value":1239.8, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.bottom of flood", "label":"Bottom of Flood", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Baldhill_Dam.Elev.Inst.0.Bottom of Flood", "latest_value":1265.06, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.bottom of normal", "label":"Bottom of Normal", 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}, { "slug":"elev.top of exclusive flood control", "label":"Top of Exclusive Flood Control", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Baldhill_Dam.Elev.Inst.0.Top of Exclusive Flood Control", "latest_value":1271, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of flood", "label":"Top of Flood", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Baldhill_Dam.Elev.Inst.0.Top of Flood", "latest_value":1271, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of normal", "label":"Top of Normal", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Baldhill_Dam.Elev.Inst.0.Top of Normal", "latest_value":1266.2, "units":"ft", "units_long_name":"Feet" }, { "slug":"stage.top of flood", "label":"Top of Flood", "parameter":"Stage", "base_parameter":"Stage", "tsid":"Baldhill_Dam.Stage.Inst.0.Top of Flood", "latest_value":71, "units":"ft", "units_long_name":"Feet" }, { "slug":"stor.bottom of conservation", "label":"Bottom of Conservation", "parameter":"Stor", "base_parameter":"Stor", "tsid":"Baldhill_Dam.Stor.Inst.0.Bottom of Conservation", "latest_value":1650, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.bottom of flood", "label":"Bottom of Flood", "parameter":"Stor", "base_parameter":"Stor", "tsid":"Baldhill_Dam.Stor.Inst.0.Bottom of Flood", "latest_value":60954.23, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.streambed", "label":"Streambed", "parameter":"Stor", "base_parameter":"Stor", "tsid":"Baldhill_Dam.Stor.Inst.0.Streambed", "latest_value":1500, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of conservation", "label":"Top of Conservation", "parameter":"Stor", "base_parameter":"Stor", "tsid":"Baldhill_Dam.Stor.Inst.0.Top of Conservation", "latest_value":71740, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of dam", "label":"Top of Dam", "parameter":"Stor", "base_parameter":"Stor", "tsid":"Baldhill_Dam.Stor.Inst.0.Top of Dam", "latest_value":157500, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of exclusive flood control", "label":"Top of Exclusive Flood Control", "parameter":"Stor", "base_parameter":"Stor", "tsid":"Baldhill_Dam.Stor.Inst.0.Top of Exclusive Flood Control", "latest_value":101300, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of flood", "label":"Top of Flood", "parameter":"Stor", "base_parameter":"Stor", "tsid":"Baldhill_Dam.Stor.Inst.0.Top of Flood", "latest_value":101300, "units":"ac-ft", "units_long_name":"Acre-feet" } ], "id":550161, "associatedStructuresCount":0, "conditionAssessDate":null, "conditionAssessDetail":null, "conditionAssessId":6, "damHeight":47, "damLength":1800, "distance":11, "drainageArea":8078, "eapId":1, "dsacAssignedDate":"2014-07-31T12:00:00.000Z", "eapMeetsGuidelinesId":0, "emergencyContactsUpdated":"2024-11-14T12:00:00.000Z", "eapLastRevDate":"2014-01-30T12:00:00.000Z", "enforcementAuthorityId":1, "federalId":"ND00309", "oldFederalId":"ND00309", "hazardId":4, "hydraulicHeight":55, "inspectionAuthorityId":1, "inspectionDate":"2023-08-03T12:00:00.000Z", "inspectionFrequency":5, "jurisdictionAuthorityId":1, "latitude":47.0346779220001, "lengthOfLocks":0, "secondaryLengthOfLocks":null, "longitude":-98.0788554439999, "maxDischarge":126000, "maxStorage":156000, "nidHeight":60, "nidStorage":156000, "normalStorage":69500, "numberOfLocks":0, "operationalStatusDate":"2023-10-23T12:00:00.000Z", "operationalStatusId":1, "originalDesignerName":null, "otherStructureId":null, "permittingAuthorityId":1, "politicalPartyId":null, "privateDamId":null, "projectDescription":"Baldhill Dam is located about 8 miles northwest of Valley City, North Dakota, in Barnes County on the Sheyenne River. The U.S. Army Corps of Engineers, in cooperation with the North Dakota State Water Commission, constructed Baldhill Dam (Lake Ashtabula) between 1947 and 1950. The dam alleviates water shortages in municipal and rural areas along the Sheyenne River and the Red River of the North by storing water in the reservoir, and supplements low flows to improve water quality. The dam reduces flood risk primarily at Valley City, but benefits downstream communities as well, including Kathryn, Fort Ransom, and Lisbon. Lake Ashtabula provides various recreational opportunities and environmental stewardship activities. The dam includes a large compacted earth embankment, a gated outlet structure used to regulate the reservoir levels, and an 880-foot wide emergency spillway that is the prominent concrete paving visible on the downstream face of the embankment. In 2004, new Tainter gates were installed and easements adjusted to increase the storage capacity of the reservoir.", "riskCharSummary":"USACE completed a risk assessment for Baldhill Dam in 2014 that characterized the risk associated with the project as Low. However, the dam does not completely eliminate flood risk in the Sheyenne River. By using weather and stream-flow forecasting, the dam is operated to reduce flood risk downstream by storing the peak river flows during each event. However, large enough storms could fill the reservoir to its capacity (up to the crest of the 880-foot wide concrete spillway), at which point additional flows must pass through the spillway, and could be large enough to overtop levees downstream. Storm events in the future could exceed previous records. In recent years, regions of North Dakota have experienced large and intense spring storms, requiring higher releases from the dam which can flood Valley City and other communities downstream. Flood events may occur throughout the year, particularly during spring snowmelt and summer storms. \n\nValley City and communities downstream on the Sheyenne River historically have benefited from the flood risk management provided by the dam most frequently during spring snowmelt. In the future, the flood season could extend through summer, and floods could be far more severe than previously experienced. During floods extreme enough to overtop riverbanks and levees, significant amounts of water passed through the dam could reach Valley City in less than 6 hours. This means residents of Valley City would have limited time to evacuate and there is a potential for life loss during catastrophic flood events. Valley City would also have areas of higher depth and faster moving water than is common in the Red River Valley.\n\nOne very unlikely aspect of the risk is observed movement of the hillside northwest of the gated spillway. Land movement, which is very common in this region, has been observed since the dam was constructed but is judged to be stable at this time. Future acceleration of the movement could interfere with operation of the gates and could potentially justify reduction of the flood storage capacity.", "riskManagementMeasures":"USACE is continually taking steps to manage the risks to the public. Weather and streamflow forecast information is critical for operating the dam most effectively. The Corps of Engineers works closely with the National Weather Service to share real-time data and river models. This information is used to minimize any flooding impacts to downstream communities. \n\nThe Valley City Levees and related infrastructure have been improved and raised by the local community. These modifications increased the amount of water the downstream river can hold, which means more water can be released from the reservoir without causing damages downstream. This has improved the effectiveness of the overall flood risk management system. \n\nLandslide movements on the west hillside are continually monitored using buried devices that measure earth movement and groundwater levels. Countermeasures to slow the movement have been installed several times; and additional measures will be taken if the landslide continues to expand.", "riverName":"SHEYENNE RIVER", "separateStructuresCount":0, "sourceAgency":"US Army Corps of Engineers", "spillwayTypeId":1, "spillwayWidth":120, "stateFedId":"ND00309", "stateRegulatoryAgency":null, "stateRegulatedId":1, "structuralHeight":60, "submitDate":"2023-02-16T17:25:12.142Z", "surfaceArea":5470, "volume":296800, "widthOfLocks":0, "secondaryWidthOfLocks":null, "yearCompleted":1950, "congDist":"Congressional District 00, North Dakota", "city":"VALLEY CITY", "county":"Barnes", "aiannh":null, "websiteUrl":"https://www.usace.army.mil/Missions/Civil-Works/Dam-Safety-Program/Article/2870967/dam-safety-program/", "coreTypeIds":"3", "damTypeIds":"11;8", "fedConstructionIds":"1", "fedDesignIds":"1", "fedFundingIds":"1", "fedInspectionIds":"1", "fedOperationIds":"1", "fedOtherIds":"1", "fedOwnerIds":"1", "fedRegulatoryIds":"1", "formerNames":null, "foundationTypeIds":"1;3", "nonFederalDamOnFederalId":0, "designerNames":"CEMVP", "otherNames":"Lake Ashtabula", "ownerNames":"USACE - St. Paul District", "ownerTypeIds":"3", "primaryDamTypeId":11, "primaryOwnerTypeId":3, "primaryPurposeId":9, "purposeIds":"9;5;8", "dsacId":4, "femaRegion":"8", "lastEapExcerDate":"2022-03-16T12:00:00.000Z", "dataUpdated":"2025-07-15T12:00:00.000Z", "usaceDistrict":"St. Paul District", "noConsequencesId":0, "secretaryAgricultureBuiltId":null, "nrcsWatershedAuthorizationId":null, "isAssociatedStructureId":"No", "fedRegulatedId":"Yes", "inundationNidAddedId":1, "damStatusId":2, "huc06":"090202", "doi_region":"MB", "doi_region_name":"Missouri Basin", "doi_region_number":5, "thirtyYearAverage":82.6253, "tenthPercentile":67.5278, "ninetiethPercentile":96.368 }, "id":2012016, "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/2012016?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/2012016?f=jsonld" }, { "rel":"alternate", "type":"text/html", "title":"This document as HTML", "href":"https://api.wwdh.internetofwater.app/collections/usace-edr/items/2012016?f=html" }, { "rel":"collection", "type":"application/json", "title":"USACE Access2Water API", "href":"https://api.wwdh.internetofwater.app/collections/usace-edr" } ] }