{ "bbox":null, "type":"Feature", "geometry":{ "bbox":null, "type":"Point", "coordinates":[ -90.53526, 39.93951 ] }, "properties":{ "provider":"MVR", "code":"IL08", "slug":"il08", "elevation":413.5, "horizontal_datum":"", "vertical_datum":"NGVD29", "state":"IL", "kind":"PROJECT", "nearest_city":"Beardston", "public_name":"Illinois River New La Grange LD", "location_code":2243017, "nsid":null, "aliases":{ "NIDID":"IL01015", "CWMS Legacy Naming":"IL08", "CWMS Standard Naming":"IL08" }, "timeseries":[ { "tsid":"IL08.Elev-Tail.Inst.30Minutes.0.rev", "label":"Elevation Tailwater", "base_parameter":"Elev", "parameter":"Elev-Tail", "unit":"ft", "unit_long_name":"Feet", "latest_time":"2026-08-25T11:00:00Z", "latest_value":434.25, "delta24h":null, "sort_order":3, "results":null }, { "tsid":"IL08.Elev-Pool.Inst.30Minutes.0.rev", "label":"Elevation", "base_parameter":"Elev", "parameter":"Elev-Pool", "unit":"ft", "unit_long_name":"Feet", "latest_time":"2026-08-25T11:00:00Z", "latest_value":434.26, "delta24h":null, "sort_order":1, "results":null }, { "tsid":"IL08.Flow.Inst.30Minutes.0.rev", "label":"Outflow", "base_parameter":"Flow", "parameter":"Flow", "unit":"cfs", "unit_long_name":"Cubic feet per second", "latest_time":"2026-08-25T11:00:00Z", "latest_value":46624.0, "delta24h":null, "sort_order":7, "results":null } ], "name":"Illinois River New La Grange LD", "hasResopsAverages":"false", "nidId":"IL01015", "nidid":"", "levels":[ { "slug":"elev.streambed", "label":"Streambed", "parameter":"Elev-Pool", "base_parameter":"Elev", "tsid":"IL08.Elev-Pool.Inst.0.Streambed", "latest_value":406, "units":"ft", "units_long_name":"Feet", "type":"CONSTANT" }, { "slug":"elev.top of dam", "label":"Top of Dam", "parameter":"Elev-Pool", "base_parameter":"Elev", "tsid":"IL08.Elev-Pool.Inst.0.Top of Dam", "latest_value":434, "units":"ft", "units_long_name":"Feet", "type":"CONSTANT" } ], "id":549727, "associatedStructuresCount":0, "conditionAssessDate":null, "conditionAssessDetail":null, "conditionAssessId":6, "damHeight":null, "damLength":676, "distance":null, "drainageArea":25648, "eapId":1, "dsacAssignedDate":"2009-05-06T12:00:00.000Z", "eapMeetsGuidelinesId":1, "emergencyContactsUpdated":"2024-05-28T12:00:00.000Z", "eapLastRevDate":"2022-10-07T12:00:00.000Z", "enforcementAuthorityId":1, "federalId":"IL01015", "oldFederalId":"IL01015", "hazardId":3, "hydraulicHeight":10, "inspectionAuthorityId":1, "inspectionDate":"2022-07-07T12:00:00.000Z", "inspectionFrequency":5, "jurisdictionAuthorityId":1, "latitude":39.9403990000001, "lengthOfLocks":600, "secondaryLengthOfLocks":null, "longitude":-90.534302, "maxDischarge":156000, "maxStorage":55000, "nidHeight":21, "nidStorage":55000, "normalStorage":0, "numberOfLocks":1, "operationalStatusDate":"2009-05-06T12:00:00.000Z", "operationalStatusId":2, "originalDesignerName":null, "otherStructureId":null, "permittingAuthorityId":1, "politicalPartyId":null, "privateDamId":null, "projectDescription":"The U.S. Army Corps of Engineers (USACE) completed construction of the LaGrange Lock and Dam in 1939 for the purpose of navigation. LaGrange Lock and Dam is located on the Illinois River about 8 river miles southwest of the City of Beardstown, Illinois. The project consists of a lock chamber, a pool regulating dam Tainter gate, a wicket dam, an abandoned pool regulating structure, and an earthen embankment. The lock chamber is used to raise or lower river traffic between the upstream and downstream pools to navigate past the dam. The lock chamber can raise or lower river traffic a maximum of 10 feet, depending on the river conditions. The Tainter gate is used to control the water levels on the upstream pool and is 84 feet long. The 436 feet long wicket dam consists of 109 wooden panels that can be raised to hold a pool or lowered to create an open river depending on the river flows. When flows are high enough to maintain minimum navigation depths without the dam, the wickets are lowered to the riverbed and traffic can bypass the lock by travelling over the lowered wickets. When river flows are low enough to not allow minimum navigation depths without the dam, the wickets are raised to hold an upstream pool, which forces river traffic to pass through the lock chamber to continue up or down the river. The abandoned regulating structure was once used to regulate the upstream water levels but was replaced by the Tainter gate and abandoned in place. The earthen embankment connects the abandoned regulating structure to high ground and is 390 feet long. During flood events on the Illinois River, the wickets are lowered to the riverbed, the Tainter gate is raised above the predicted water levels, and the lock chamber goes under water. Once water levels recede, the site is cleaned and normal operation of the project features resume. The biggest flood on record was on July 2, 2015 and submerged the lock chamber by 14 feet and 2 inches of water.", "riskCharSummary":"USACE completed a risk assessment in March 2022 and classified the risk associated with LaGrange Lock and Dam as very low. The risk assessment investigated the potential for ice damage to the wicket gate structures. Although unlikely, a dam failure would impact river navigation upstream of the dam only and a lock shutdown was estimated to be short enough to result in no substantial economic damages to navigation. There is no estimated life loss resulting from a failure of the dam and the flood wave produced by a dam failure would remain within the riverbanks resulting in minimal to no downstream property damages.", "riskManagementMeasures":"USACE works to reduce the risks posed to the community by LaGrange Lock and Dam. USACE operations and engineering staff routinely conduct detailed inspections of the lock and dam to ensure the integrity of the lock and dam, identify new deficiencies, and monitor known deficiencies. The dam is well maintained through continuous operations and regular maintenance activities. The dam has a robust instrumentation and monitoring program that allows USACE staff to regularly monitor the dam\u2019s performance under changing river conditions. The dam\u2019s Emergency Action Plan is updated regularly, and the emergency notification charts are updated annually. This plan has been coordinated with state and local Emergency Management Agencies to help improve their dam incident response planning and preparedness responsibilities. Emergency exercises are routinely held with local and state emergency responders and stakeholders to enhance the local communities\u2019 emergency response plans.", "riverName":"ILLINOIS RIVER", "separateStructuresCount":0, "sourceAgency":"US Army Corps of Engineers", "spillwayTypeId":2, "spillwayWidth":0, "stateFedId":"IL01015", "stateRegulatoryAgency":null, "stateRegulatedId":1, "structuralHeight":21, "submitDate":"2023-02-16T17:25:35.647Z", "surfaceArea":0, "volume":18000, "widthOfLocks":110, "secondaryWidthOfLocks":null, "yearCompleted":1939, "congDist":"Congressional District 15, Illinois", "city":"MEREDOSIA", "county":"Brown", "aiannh":null, "websiteUrl":"https://www.usace.army.mil/Missions/Civil-Works/Dam-Safety-Program/Article/2870967/dam-safety-program/", "coreTypeIds":null, "damTypeIds":"11;12", "fedConstructionIds":"1", "fedDesignIds":"1", "fedFundingIds":"1", "fedInspectionIds":"1", "fedOperationIds":"1", "fedOtherIds":"1", "fedOwnerIds":"1", "fedRegulatoryIds":"1", "formerNames":null, "foundationTypeIds":"3", "nonFederalDamOnFederalId":0, "designerNames":"CEMVR", "otherNames":"LaGrange Pool", "ownerNames":"USACE - Rock Island District", "ownerTypeIds":"3", "primaryDamTypeId":11, "primaryOwnerTypeId":3, "primaryPurposeId":3, "purposeIds":"3", "dsacId":2, "femaRegion":"5", "lastEapExcerDate":"2025-02-04T12:00:00.000Z", "dataUpdated":"2025-02-21T12:00:00.000Z", "usaceDistrict":"Rock Island District", "noConsequencesId":1, "secretaryAgricultureBuiltId":null, "nrcsWatershedAuthorizationId":null, "isAssociatedStructureId":"No", "fedRegulatedId":"Yes", "inundationNidAddedId":2, "damStatusId":2, "huc06":"071300", "doi_region":null, "doi_region_name":"Great Lakes", "doi_region_number":3 }, "id":2243017, "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/2243017?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/2243017?f=jsonld" }, { "rel":"alternate", "type":"text/html", "title":"This document as HTML", "href":"https://api.wwdh.internetofwater.app/collections/usace-edr/items/2243017?f=html" }, { "rel":"collection", "type":"application/json", "title":"USACE Access2Water API", "href":"https://api.wwdh.internetofwater.app/collections/usace-edr" } ] }