{ "bbox":null, "type":"Feature", "geometry":{ "bbox":null, "type":"Point", "coordinates":[ -92.61027, 44.61027 ] }, "properties":{ "provider":"MVP", "code":"LockDam_03", "slug":"lockdam_03", "elevation":600.0, "horizontal_datum":"NAD83", "vertical_datum":"LOCAL", "state":"MN", "kind":"PROJECT", "nearest_city":"Red Wing", "public_name":"Lock and Dam 3", "location_code":4572016, "nsid":null, "aliases":{ "NIDID":"MN00595", "CWMS Legacy Naming":"LockDam_03", "CWMS Standard Naming":"LockDam_03", "NWS Handbook 5 ID":"RDWM5" }, "timeseries":[ { "tsid":"LockDam_03-Tailwater.Elev.Inst.~15Minutes.0.best-MSL1912", "label":"Elevation Tailwater", "base_parameter":"Elev", "parameter":"Elev", "unit":"ft", "unit_long_name":"Feet", "latest_time":"2026-04-14T22:15:00Z", "latest_value":671.44, "delta24h":null, "sort_order":3, "results":null }, { "tsid":"LockDam_03.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":"2026-04-14T22:15:00Z", "latest_value":28320.0, "delta24h":null, "sort_order":7, "results":null } ], "name":"Lock and Dam 3", "hasResopsAverages":"false", "nidId":"MN00595", "nidid":"", "levels":[ { "slug":"elev.bottom of conservation", "label":"Bottom of Conservation", "parameter":"Elev", "base_parameter":"Elev", "tsid":"LockDam_03.Elev.Inst.0.Bottom of Conservation", "latest_value":674, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.bottom of normal", "label":"Bottom of Normal", "parameter":"Elev", "base_parameter":"Elev", "tsid":"LockDam_03.Elev.Inst.0.Bottom of Normal", "latest_value":674, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.streambed", "label":"Streambed", "parameter":"Elev", "base_parameter":"Elev", "tsid":"LockDam_03.Elev.Inst.0.Streambed", "latest_value":652.5, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of conservation", "label":"Top of Conservation", "parameter":"Elev", "base_parameter":"Elev", "tsid":"LockDam_03.Elev.Inst.0.Top of Conservation", "latest_value":675, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of dam", "label":"Top of Dam", "parameter":"Elev", "base_parameter":"Elev", "tsid":"LockDam_03.Elev.Inst.0.Top of Dam", "latest_value":686, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of normal", "label":"Top of Normal", "parameter":"Elev", "base_parameter":"Elev", "tsid":"LockDam_03.Elev.Inst.0.Top of Normal", "latest_value":675, "units":"ft", "units_long_name":"Feet" }, { "slug":"stage.bottom of normal", "label":"Bottom of Normal", "parameter":"Stage", "base_parameter":"Stage", "tsid":"LockDam_03.Stage.Inst.0.Bottom of Normal", "latest_value":74, "units":"ft", "units_long_name":"Feet" }, { "slug":"stage.streambed", "label":"Streambed", "parameter":"Stage", "base_parameter":"Stage", "tsid":"LockDam_03.Stage.Inst.0.Streambed", "latest_value":52.5, "units":"ft", "units_long_name":"Feet" }, { "slug":"stage.top of dam", "label":"Top of Dam", "parameter":"Stage", "base_parameter":"Stage", "tsid":"LockDam_03.Stage.Inst.0.Top of Dam", "latest_value":86, "units":"ft", "units_long_name":"Feet" }, { "slug":"stage.top of normal", "label":"Top of Normal", "parameter":"Stage", "base_parameter":"Stage", "tsid":"LockDam_03.Stage.Inst.0.Top of Normal", "latest_value":75, "units":"ft", "units_long_name":"Feet" } ], "id":550280, "associatedStructuresCount":0, "conditionAssessDate":null, "conditionAssessDetail":null, "conditionAssessId":6, "damHeight":26, "damLength":4500, "distance":4, "drainageArea":45170, "eapId":1, "dsacAssignedDate":"2022-09-09T12:00:00.000Z", "eapMeetsGuidelinesId":1, "emergencyContactsUpdated":"2024-11-14T12:00:00.000Z", "eapLastRevDate":"2023-07-13T12:00:00.000Z", "enforcementAuthorityId":0, "federalId":"MN00595", "oldFederalId":"MN00595", "hazardId":3, "hydraulicHeight":38, "inspectionAuthorityId":0, "inspectionDate":"2021-09-23T12:00:00.000Z", "inspectionFrequency":5, "jurisdictionAuthorityId":0, "latitude":44.6110444270001, "lengthOfLocks":600, "secondaryLengthOfLocks":null, "longitude":-92.609952242, "maxDischarge":230000, "maxStorage":547000, "nidHeight":44, "nidStorage":547000, "normalStorage":290000, "numberOfLocks":1, "operationalStatusDate":"2022-09-09T12:00:00.000Z", "operationalStatusId":1, "originalDesignerName":null, "otherStructureId":null, "permittingAuthorityId":0, "politicalPartyId":null, "privateDamId":null, "projectDescription":"The U.S. Army Corps of Engineers (USACE) completed the Mississippi River Lock & Dam 3 in 1938. The project is located on the Mississippi River near Red Wing, Minnesota. USACE operates Lock & Dam 3 primarily for navigation purposes, but congress also authorized USACE to make recreation improvements associated with the pool formed above the dam. Additionally, environmental management on the river is coordinated with the U. S. Fish & Wildlife Service, Minnesota and Wisconsin Departments of Natural Resources, and other state & federal agencies. The main components of the project include a lock, a gated spillway structure with 4 roller gates, an earth embankment on the Minnesota side, and a series of overflow earthen embankments on the Wisconsin side.\n\nMississippi River Lock & Dam 3 is a run-of-river dam that maintains a navigation pool for river traffic but does not store flood waters. The gated spillway is regulated to hold a constant pool level for navigation purposes at elevation 674.6 (NAVD 88) up to river flows of 36,000 cfs. The 36,000 cfs is exceeded about 15% of the time and occurs most years (typically in the spring). Above this flow, the gates are fully opened, and the dam has less than one foot of impact on the river stages. The maximum water level differential across the dam is 8 feet and occurs at low river flows.", "riskCharSummary":"USACE conducted a risk assessment in 2021 and considers Mississippi River Lock & Dam 3 to be a very low risk dam (DSAC 5) among its more than 700 dams. Lock 3 does have back tows that change with flow conditions and are dangerous to boaters and fisherman, so the public is reminded to obey the restricted zones. Lock 3 was also known in the navigation industry to have strong outdraft currents that pulled barges into the spillway. This has been mitigated by navigation improvements that included extension of the upper guidewall and moving the approach channel toward the spillway to reduce channel velocities in the lock approach area.", "riskManagementMeasures":"USACE is continuously taking steps to reduce the risk to the public. USACE manages dam-related flood risks by continually monitoring the condition and health of the dam and prioritizing activities that will most impact these risks. Regular maintenance and repairs are performed as needed to keep the dam functioning properly. Other hazards exist, such as swimming and boat safety in the vicinity of the dam. USACE regularly engages the public to raise awareness of the dam; and coordinates with state and county emergency managers (particularly during river flood events).", "riverName":"MISSISSIPPI", "separateStructuresCount":0, "sourceAgency":"US Army Corps of Engineers", "spillwayTypeId":1, "spillwayWidth":320, "stateFedId":"MN00595", "stateRegulatoryAgency":null, "stateRegulatedId":0, "structuralHeight":44, "submitDate":"2023-02-16T17:25:22.480Z", "surfaceArea":17950, "volume":134000, "widthOfLocks":110, "secondaryWidthOfLocks":null, "yearCompleted":1938, "congDist":"Congressional District 01, Minnesota", "city":"RED WING", "county":"Goodhue", "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":"3", "nonFederalDamOnFederalId":0, "designerNames":"CEMVP", "otherNames":"Pool 3", "ownerNames":"USACE - St. Paul District", "ownerTypeIds":"3", "primaryDamTypeId":11, "primaryOwnerTypeId":3, "primaryPurposeId":3, "purposeIds":"3;5", "dsacId":5, "femaRegion":"5", "lastEapExcerDate":"2019-09-30T12:00:00.000Z", "dataUpdated":"2024-11-14T12:00:00.000Z", "usaceDistrict":"St. Paul District", "noConsequencesId":1, "secretaryAgricultureBuiltId":null, "nrcsWatershedAuthorizationId":null, "isAssociatedStructureId":"No", "fedRegulatedId":"Yes", "inundationNidAddedId":2, "damStatusId":2, "huc06":"070400", "doi_region":null, "doi_region_name":"Great Lakes", "doi_region_number":3 }, "id":4572016, "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/4572016?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/4572016?f=jsonld" }, { "rel":"alternate", "type":"text/html", "title":"This document as HTML", "href":"https://api.wwdh.internetofwater.app/collections/usace-edr/items/4572016?f=html" }, { "rel":"collection", "type":"application/json", "title":"USACE Access2Water API", "href":"https://api.wwdh.internetofwater.app/collections/usace-edr" } ] }