{ "bbox":null, "type":"Feature", "geometry":{ "bbox":null, "type":"Point", "coordinates":[ -91.09713, 43.21296 ] }, "properties":{ "provider":"MVP", "code":"LockDam_09", "slug":"lockdam_09", "elevation":600.0, "horizontal_datum":"NAD83", "vertical_datum":"LOCAL", "state":"WI", "kind":"PROJECT", "nearest_city":"Lynxville", "public_name":"Lock and Dam 9", "location_code":4579016, "nsid":null, "aliases":{ "NIDID":"WI00733", "CWMS Legacy Naming":"LockDam_09", "CWMS Standard Naming":"LockDam_09", "NWS Handbook 5 ID":"LYNW3" }, "timeseries":[ { "tsid":"LockDam_09.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":73210.01, "delta24h":null, "sort_order":7, "results":null }, { "tsid":"LockDam_09-Spillway.Flow.Inst.15Minutes.0.comp", "label":"Surcharge Release", "base_parameter":"Flow", "parameter":"Flow", "unit":"cfs", "unit_long_name":"Cubic feet per second", "latest_time":"2026-04-14T22:15:00Z", "latest_value":200.0, "delta24h":null, "sort_order":8, "results":null }, { "tsid":"LockDam_09.Elev.Inst.~15Minutes.0.best-MSL1912", "label":"Elevation", "base_parameter":"Elev", "parameter":"Elev", "unit":"ft", "unit_long_name":"Feet", "latest_time":"2026-04-14T22:15:00Z", "latest_value":619.36, "delta24h":null, "sort_order":1, "results":null }, { "tsid":"LockDam_09-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":619.11, "delta24h":null, "sort_order":3, "results":null } ], "name":"Lock and Dam 9", "hasResopsAverages":"false", "nidId":"WI00733", "nidid":"", "levels":[ { "slug":"elev.bottom of conservation", "label":"Bottom of Conservation", "parameter":"Elev", "base_parameter":"Elev", "tsid":"LockDam_09.Elev.Inst.0.Bottom of Conservation", "latest_value":619, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.bottom of normal", "label":"Bottom of Normal", "parameter":"Elev", "base_parameter":"Elev", "tsid":"LockDam_09.Elev.Inst.0.Bottom of Normal", "latest_value":619, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.streambed", "label":"Streambed", "parameter":"Elev", "base_parameter":"Elev", "tsid":"LockDam_09.Elev.Inst.0.Streambed", "latest_value":597, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of conservation", "label":"Top of Conservation", "parameter":"Elev", "base_parameter":"Elev", "tsid":"LockDam_09.Elev.Inst.0.Top of Conservation", "latest_value":620, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of dam", "label":"Top of Dam", "parameter":"Elev", "base_parameter":"Elev", "tsid":"LockDam_09.Elev.Inst.0.Top of Dam", "latest_value":633, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of normal", "label":"Top of Normal", "parameter":"Elev", "base_parameter":"Elev", "tsid":"LockDam_09.Elev.Inst.0.Top of Normal", "latest_value":620, "units":"ft", "units_long_name":"Feet" }, { "slug":"stage.bottom of normal", "label":"Bottom of Normal", "parameter":"Stage", "base_parameter":"Stage", "tsid":"LockDam_09.Stage.Inst.0.Bottom of Normal", "latest_value":19, "units":"ft", "units_long_name":"Feet" }, { "slug":"stage.streambed", "label":"Streambed", "parameter":"Stage", "base_parameter":"Stage", "tsid":"LockDam_09.Stage.Inst.0.Streambed", "latest_value":-3, "units":"ft", "units_long_name":"Feet" }, { "slug":"stage.top of dam", "label":"Top of Dam", "parameter":"Stage", "base_parameter":"Stage", "tsid":"LockDam_09.Stage.Inst.0.Top of Dam", "latest_value":33, "units":"ft", "units_long_name":"Feet" }, { "slug":"stage.top of normal", "label":"Top of Normal", "parameter":"Stage", "base_parameter":"Stage", "tsid":"LockDam_09.Stage.Inst.0.Top of Normal", "latest_value":20, "units":"ft", "units_long_name":"Feet" } ], "id":549920, "associatedStructuresCount":0, "conditionAssessDate":null, "conditionAssessDetail":null, "conditionAssessId":6, "damHeight":18, "damLength":9087, "distance":12, "drainageArea":66610, "eapId":1, "dsacAssignedDate":"2022-09-09T12:00:00.000Z", "eapMeetsGuidelinesId":1, "emergencyContactsUpdated":"2024-11-14T12:00:00.000Z", "eapLastRevDate":"1995-07-01T12:00:00.000Z", "enforcementAuthorityId":0, "federalId":"WI00733", "oldFederalId":"WI00733", "hazardId":3, "hydraulicHeight":32, "inspectionAuthorityId":0, "inspectionDate":"2019-09-18T12:00:00.000Z", "inspectionFrequency":5, "jurisdictionAuthorityId":0, "latitude":43.21222956, "lengthOfLocks":600, "secondaryLengthOfLocks":null, "longitude":-91.100146222, "maxDischarge":278000, "maxStorage":470000, "nidHeight":46, "nidStorage":470000, "normalStorage":197000, "numberOfLocks":1, "operationalStatusDate":"2022-09-09T12:00:00.000Z", "operationalStatusId":1, "originalDesignerName":null, "otherStructureId":null, "permittingAuthorityId":0, "politicalPartyId":null, "privateDamId":0, "projectDescription":"The U.S. Army Corps of Engineers (USACE) completed Lock & Dam 9 in 1937. The project is located on the Mississippi River near Prairie du Chien, Wisconsin. USACE operates Lock & Dam 9 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 5 roller gates and 8 Tainter gates, an overflow weir, and 1.7 miles of earthen embankments connecting these other components. The embankment sections have a crest elevation of 632.3 feet (NAVD 88) and a maximum height of 27 feet.", "riskCharSummary":"Lock & Dam 9 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 619.3 up to river flows of 63,000 cfs. The 63,000 cfs flow is exceeded about 20% of the time and occurs most years (primarily 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 9 feet and occurs at low river flows. Based upon a risk assessment in 2019, USACE considers Lock & Dam 9 to be a very low risk dam among its more than 700 dams. Identified risks are primarily due to aging miter gates in the locks, and potential for navigation accidents. Other risks include the failure of the earth dam due to overtopping or scour at the overflow spillways.", "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 RIVER", "separateStructuresCount":0, "sourceAgency":"US Army Corps of Engineers", "spillwayTypeId":1, "spillwayWidth":680, "stateFedId":"WI00733", "stateRegulatoryAgency":null, "stateRegulatedId":0, "structuralHeight":46, "submitDate":"2023-02-16T17:25:23.844Z", "surfaceArea":29125, "volume":524200, "widthOfLocks":110, "secondaryWidthOfLocks":null, "yearCompleted":1937, "congDist":"Congressional District 02, Iowa", "city":"PRAIRIE DU CHIEN", "county":"Allamakee", "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":"Lock & Dam 9 (Winthrop Rockfeller)", "ownerNames":"USACE - St. Paul District", "ownerTypeIds":"3", "primaryDamTypeId":11, "primaryOwnerTypeId":3, "primaryPurposeId":3, "purposeIds":"3;5", "dsacId":5, "femaRegion":"5", "lastEapExcerDate":"2019-09-04T12:00:00.000Z", "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":"070600", "doi_region":null, "doi_region_name":"Great Lakes", "doi_region_number":3 }, "id":4579016, "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/4579016?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/4579016?f=jsonld" }, { "rel":"alternate", "type":"text/html", "title":"This document as HTML", "href":"https://api.wwdh.internetofwater.app/collections/usace-edr/items/4579016?f=html" }, { "rel":"collection", "type":"application/json", "title":"USACE Access2Water API", "href":"https://api.wwdh.internetofwater.app/collections/usace-edr" } ] }