{ "bbox":null, "type":"Feature", "geometry":{ "bbox":null, "type":"Point", "coordinates":[ -92.23947, 44.85593 ] }, "properties":{ "provider":"MVP", "code":"EauGalle_Dam", "slug":"eaugalle_dam", "elevation":900.0, "horizontal_datum":"NAD83", "vertical_datum":"NGVD29", "state":"WI", "kind":"PROJECT", "nearest_city":"Spring Valley", "public_name":"Eau Galle Dam", "location_code":3855016, "nsid":null, "aliases":{ "NIDID":"WI00780", "CWMS Legacy Naming":"EauGalle_Dam", "CWMS Standard Naming":"EauGalle_Dam", "NWS Handbook 5 ID":"SVPW3" }, "timeseries":[ { "tsid":"EauGalle_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":"2026-04-14T21:45:00Z", "latest_value":48.2, "delta24h":null, "sort_order":7, "results":null }, { "tsid":"EauGalle_Dam-Tailwater.Elev.Inst.~15Minutes.0.best-NGVD29", "label":"Elevation Tailwater", "base_parameter":"Elev", "parameter":"Elev", "unit":"ft", "unit_long_name":"Feet", "latest_time":"2026-04-14T21:45:00Z", "latest_value":913.16, "delta24h":null, "sort_order":3, "results":null }, { "tsid":"EauGalle_Dam.Elev.Inst.~15Minutes.0.best-NGVD29", "label":"Elevation", "base_parameter":"Elev", "parameter":"Elev", "unit":"ft", "unit_long_name":"Feet", "latest_time":"2026-04-14T22:30:00Z", "latest_value":940.57, "delta24h":null, "sort_order":1, "results":null }, { "tsid":"EauGalle_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":"2026-04-14T06:00:00Z", "latest_value":14.3, "delta24h":null, "sort_order":6, "results":null }, { "tsid":"EauGalle_Dam-Tailwater.Stage.Inst.15Minutes.0.rev", "label":"Stage Tailwater", "base_parameter":"Stage", "parameter":"Stage", "unit":"ft", "unit_long_name":"Feet", "latest_time":"2026-04-14T21:45:00Z", "latest_value":13.16, "delta24h":null, "sort_order":5, "results":null } ], "name":"Eau Galle Dam", "hasResopsAverages":"false", "nidId":"WI00780", "nidid":"", "levels":[ { "slug":"elev.streambed", "label":"Streambed", "parameter":"Elev", "base_parameter":"Elev", "tsid":"EauGalle_Dam.Elev.Inst.0.Streambed", "latest_value":916.5, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of conservation", "label":"Top of Conservation", "parameter":"Elev", "base_parameter":"Elev", "tsid":"EauGalle_Dam.Elev.Inst.0.Top of Conservation", "latest_value":940, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of dam", "label":"Top of Dam", "parameter":"Elev", "base_parameter":"Elev", "tsid":"EauGalle_Dam.Elev.Inst.0.Top of Dam", "latest_value":1040.15, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of flood", "label":"Top of Flood", "parameter":"Elev", "base_parameter":"Elev", "tsid":"EauGalle_Dam.Elev.Inst.0.Top of Flood", "latest_value":1019.5, "units":"ft", "units_long_name":"Feet" }, { "slug":"stor.streambed", "label":"Streambed", "parameter":"Stor", "base_parameter":"Stor", "tsid":"EauGalle_Dam.Stor.Inst.0.Streambed", "latest_value":68, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of conservation", "label":"Top of Conservation", "parameter":"Stor", "base_parameter":"Stor", "tsid":"EauGalle_Dam.Stor.Inst.0.Top of Conservation", "latest_value":1536, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of dam", "label":"Top of Dam", "parameter":"Stor", "base_parameter":"Stor", "tsid":"EauGalle_Dam.Stor.Inst.0.Top of Dam", "latest_value":63650, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of flood", "label":"Top of Flood", "parameter":"Stor", "base_parameter":"Stor", "tsid":"EauGalle_Dam.Stor.Inst.0.Top of Flood", "latest_value":43550, "units":"ac-ft", "units_long_name":"Acre-feet" } ], "id":549922, "associatedStructuresCount":0, "conditionAssessDate":null, "conditionAssessDetail":null, "conditionAssessId":6, "damHeight":29, "damLength":1800, "distance":1, "drainageArea":64, "eapId":1, "dsacAssignedDate":"2009-05-12T12:00:00.000Z", "eapMeetsGuidelinesId":1, "emergencyContactsUpdated":"2024-11-14T12:00:00.000Z", "eapLastRevDate":"2019-05-02T12:00:00.000Z", "enforcementAuthorityId":0, "federalId":"WI00780", "oldFederalId":"WI00780", "hazardId":4, "hydraulicHeight":125, "inspectionAuthorityId":0, "inspectionDate":"2020-08-26T12:00:00.000Z", "inspectionFrequency":5, "jurisdictionAuthorityId":0, "latitude":44.8559309550001, "lengthOfLocks":0, "secondaryLengthOfLocks":null, "longitude":-92.239680339, "maxDischarge":18700, "maxStorage":56900, "nidHeight":127, "nidStorage":56900, "normalStorage":1550, "numberOfLocks":0, "operationalStatusDate":"2009-05-12T12:00:00.000Z", "operationalStatusId":1, "originalDesignerName":null, "otherStructureId":null, "permittingAuthorityId":0, "politicalPartyId":null, "privateDamId":0, "projectDescription":"Eau Galle Dam is a flood risk management dam located in Pierce County, Wisconsin (about 50 miles east of St. Paul, Minnesota). The dam is immediately upstream of the Village of Spring Valley, Wisconsin. The dam was constructed under the authority of the Flood Control Act of 1944 (Public Law 78-534). The reservoir outlet is ungated with a morning glory intake and conduit that runs along the left abutment. The size of the conduit limits outflows within the downstream channel capacity. There is an emergency spillway notched in the rock on the right abutment to prevent dam overtopping for extreme floods, but the frequency of such events is extremely rare (estimated recurrence about 5000 years).", "riskCharSummary":"A risk assessment in 2020 concluded the dam is well constructed with modern design criteria. The risk assessment investigated three potential failure modes that included embankment overtopping, concentrated leak erosion along the conduit, and concentrated leak erosion in rock joint sets in the right abutment. All three failure modes were determined to be very remote. The risk assessment also updated inundation mapping which shows a very high life safety hazard since Spring Valley is in a valley immediately downstream of the dam. The dam safety risk was categorized as low (relative to the Corps 700 dams) and tolerable.", "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 Corps maintains instrumentation on the dam and periodically makes assessments to verify the dam\u2019s performance. A dam failure warning system has been considered because of the quick response of the reservoir to rainfall and considering consequences that would be incurred by activation of the emergency spillway; but the frequency and anticipated situational awareness during such events did not justify the maintenance.", "riverName":"EAU GALLE", "separateStructuresCount":0, "sourceAgency":"US Army Corps of Engineers", "spillwayTypeId":3, "spillwayWidth":10, "stateFedId":"WI00780", "stateRegulatoryAgency":null, "stateRegulatedId":0, "structuralHeight":127, "submitDate":"2023-02-16T17:25:35.545Z", "surfaceArea":880, "volume":2158000, "widthOfLocks":0, "secondaryWidthOfLocks":null, "yearCompleted":1968, "congDist":"Congressional District 03, Wisconsin", "city":"SPRING VALLEY", "county":"Pierce", "aiannh":null, "websiteUrl":"https://www.usace.army.mil/Missions/Civil-Works/Dam-Safety-Program/Article/2870967/dam-safety-program/", "coreTypeIds":"3", "damTypeIds":"5", "fedConstructionIds":"1", "fedDesignIds":"1", "fedFundingIds":"1", "fedInspectionIds":"1", "fedOperationIds":"1", "fedOtherIds":"1", "fedOwnerIds":"1", "fedRegulatoryIds":"1", "formerNames":null, "foundationTypeIds":"1", "nonFederalDamOnFederalId":0, "designerNames":"CEMVP", "otherNames":"Lake George", "ownerNames":"USACE - St. Paul District", "ownerTypeIds":"3", "primaryDamTypeId":5, "primaryOwnerTypeId":3, "primaryPurposeId":9, "purposeIds":"9;4;5", "dsacId":4, "femaRegion":"5", "lastEapExcerDate":"2022-03-30T12:00:00.000Z", "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":"070500", "doi_region":null, "doi_region_name":"Great Lakes", "doi_region_number":3 }, "id":3855016, "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/3855016?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/3855016?f=jsonld" }, { "rel":"alternate", "type":"text/html", "title":"This document as HTML", "href":"https://api.wwdh.internetofwater.app/collections/usace-edr/items/3855016?f=html" }, { "rel":"collection", "type":"application/json", "title":"USACE Access2Water API", "href":"https://api.wwdh.internetofwater.app/collections/usace-edr" } ] }