{ "bbox":null, "type":"Feature", "geometry":{ "bbox":null, "type":"Point", "coordinates":[ -89.94611, 37.98444 ] }, "properties":{ "provider":"MVS", "code":"Nav Pool", "slug":"nav%20pool", "elevation":325.0, "horizontal_datum":"", "vertical_datum":"", "state":"IL", "kind":"PROJECT", "nearest_city":"Ellis Grove, IL", "public_name":"Nav Project", "location_code":717018, "nsid":null, "aliases":{ "NIDID":"IL00115" }, "timeseries":[ { "tsid":"Nav Pool-Kaskaskia.Precip.Inst.30Minutes.0.lrgsShef-rev", "label":"Precipitation", "base_parameter":"Precip", "parameter":"Precip", "unit":"in", "unit_long_name":"Inches", "latest_time":"2026-08-25T22:00:00Z", "latest_value":21.29, "delta24h":null, "sort_order":16, "results":null }, { "tsid":"Nav Pool-Kaskaskia.Elev.Inst.30Minutes.0.lrgsShef-rev", "label":"Elevation", "base_parameter":"Elev", "parameter":"Elev", "unit":"ft", "unit_long_name":"Feet", "latest_time":"2026-08-25T22:00:00Z", "latest_value":368.48, "delta24h":null, "sort_order":1, "results":null } ], "name":"Nav Project", "hasResopsAverages":"true", "nidId":"IL00115", "nidid":"", "levels":[ { "slug":"elev.streambed", "label":"Streambed", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Nav Pool.Elev.Inst.0.Streambed", "latest_value":340, "units":"ft", "units_long_name":"Feet", "type":"CONSTANT" }, { "slug":"elev.top of conservation", "label":"Top of Conservation", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Nav Pool.Elev.Inst.0.Top of Conservation", "latest_value":368.8, "units":"ft", "units_long_name":"Feet", "type":"CONSTANT" }, { "slug":"elev.top of dam", "label":"Top of Dam", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Nav Pool.Elev.Inst.0.Top of Dam", "latest_value":385, "units":"ft", "units_long_name":"Feet", "type":"CONSTANT" }, { "slug":"elev.top of flood", "label":"Top of Flood", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Nav Pool.Elev.Inst.0.Top of Flood", "latest_value":370, "units":"ft", "units_long_name":"Feet", "type":"CONSTANT" }, { "slug":"elev.top of inactive", "label":"Top of Inactive", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Nav Pool.Elev.Inst.0.Top of Inactive", "latest_value":363, "units":"ft", "units_long_name":"Feet", "type":"CONSTANT" }, { "slug":"stage.flood", "label":"Flood", "parameter":"Stage", "base_parameter":"Stage", "tsid":"Nav Pool.Stage.Inst.0.Flood", "latest_value":909, "units":"ft", "units_long_name":"Feet", "type":"CONSTANT" }, { "slug":"stor.top of conservation", "label":"Top of Conservation", "parameter":"Stor", "base_parameter":"Stor", "tsid":"Nav Pool.Stor.Inst.0.Top of Conservation", "latest_value":8817, "units":"ac-ft", "units_long_name":"Acre-feet", "type":"CONSTANT" }, { "slug":"stor.top of dam", "label":"Top of Dam", "parameter":"Stor", "base_parameter":"Stor", "tsid":"Nav Pool.Stor.Inst.0.Top of Dam", "latest_value":250000, "units":"ac-ft", "units_long_name":"Acre-feet", "type":"CONSTANT" }, { "slug":"stor.top of flood", "label":"Top of Flood", "parameter":"Stor", "base_parameter":"Stor", "tsid":"Nav Pool.Stor.Inst.0.Top of Flood", "latest_value":9610, "units":"ac-ft", "units_long_name":"Acre-feet", "type":"CONSTANT" }, { "slug":"stor.top of inactive", "label":"Top of Inactive", "parameter":"Stor", "base_parameter":"Stor", "tsid":"Nav Pool.Stor.Inst.0.Top of Inactive", "latest_value":6149, "units":"ac-ft", "units_long_name":"Acre-feet", "type":"CONSTANT" } ], "id":549745, "associatedStructuresCount":0, "conditionAssessDate":null, "conditionAssessDetail":null, "conditionAssessId":6, "damHeight":66, "damLength":603, "distance":20, "drainageArea":5790, "eapId":1, "dsacAssignedDate":"2019-05-30T12:00:00.000Z", "eapMeetsGuidelinesId":0, "emergencyContactsUpdated":"2025-06-02T12:00:00.000Z", "eapLastRevDate":"2011-02-22T12:00:00.000Z", "enforcementAuthorityId":0, "federalId":"IL00115", "oldFederalId":"IL00115", "hazardId":3, "hydraulicHeight":53, "inspectionAuthorityId":0, "inspectionDate":"2023-03-29T12:00:00.000Z", "inspectionFrequency":5, "jurisdictionAuthorityId":0, "latitude":37.984187052, "lengthOfLocks":600, "secondaryLengthOfLocks":null, "longitude":-89.945965423, "maxDischarge":62000, "maxStorage":25246, "nidHeight":81, "nidStorage":25246, "normalStorage":22183, "numberOfLocks":1, "operationalStatusDate":"2019-05-30T12:00:00.000Z", "operationalStatusId":1, "originalDesignerName":null, "otherStructureId":null, "permittingAuthorityId":0, "politicalPartyId":null, "privateDamId":null, "projectDescription":"The Jerry F. Costello Lock and Dam is located near the confluence of the Kaskaskia River with the Mississippi River at Kaskaskia River mile 0.8 in a relocated portion of river channel known as the Kaskaskia River Project in Randolph County, Illinois approximately 20 miles north of Chester, Illinois. The lock consists of an 84-foot by 600-foot lock chamber founded on sand, gate bays, a culvert filling and emptying system with Tainter valves, lock Miter gates, upper and lower floating guidewalls, control house, control station, access bridge, and sheetpile/clay-plug cutoff. The dam is a reinforced concrete gravity structure founded on sand. It consists of a two 60-foot by 30-foot Tainter gates, spillway, cutoff walls extending into earthen embankment both left and right, walkway bridge, storage yard, and overhead monorail crane for placing bulkheads. The dam site is bounded on one side by the Prairie du Rocher Levee District levee (which has an approximate average maximum elevation of 397 feet NAVD88 in the vicinity of the project). The project has a drainage area of approximately 5,790 square miles. Jerry F. Costello Lock and Dam was authorized for commercial navigation, fish and wildlife restoration, and recreation. Flood control is not an authorized project purpose. The project was not designed for flood control, nor is it possible to operate the project for this purpose.", "riskCharSummary":"The Jerry F. Costello Lock and Dam is currently categorized as Dam Safety Action Classification (DSAC) 5, which corresponds to a Very Low risk category. Although the Jerry F. Costello Lock and Dam has historically performed well, extreme river conditions and earthquake events may cause an impact to or loss of navigation. Even when the project operates as intended, the dynamic nature of the river could cause scouring around the structures. The scouring would have the potential to allow uplift pressures beneath the structures to increase if allowed to progress. The most devastating potential scenario, but significantly less likely to happen, would occur if the project was subjected to a larger earthquake during high headwater and low tailwater conditions. Although these scenarios are considered extremely unlikely, Jerry F. Costello Lock and Dam has an emergency action plan to lower the risk of loss of navigation if any of these scenarios occurred. \nInundation maps and consequence estimates were not produced for this dam since there is no potential loss of life should it fail or mis-operate. This dam is designed with limited storage during normal and low water operations to ensure adequate flows to support navigation. During high flow events, the dam functions as a run-of-the-river project, allowing the river to pass through naturally. Therefore, in the unlikely event of a dam failure with low or normal water flows in the river, water would not overflow the riverbanks. If the dam failed during a large flood the dam itself would not affect the extent of flooding since it was not storing water.", "riskManagementMeasures":"USACE is continuously taking significant steps to reduce the risk of loss of navigation. This includes working closely with local emergency managers, regularly updating the Emergency Action Plan, and conducting emergency exercises with state and local response teams. USACE regularly inspects and monitors instruments to check the health of the dam, including underwater surveys of the river upstream, downstream, and around the project to monitor for changing conditions. The frequency of some of these checks increases when the difference between the headwater and tailwater reaches historic highs. This ensures that the structure is performing as designed and could help detect any areas of potential concern. Regular maintenance and repairs are performed as needed to keep the project functioning properly. Special repairs to scoured areas have been performed and are monitored for effectiveness.", "riverName":"KASKASKIA RIVER", "separateStructuresCount":0, "sourceAgency":"US Army Corps of Engineers", "spillwayTypeId":1, "spillwayWidth":120, "stateFedId":"IL00115", "stateRegulatoryAgency":null, "stateRegulatedId":0, "structuralHeight":81, "submitDate":"2023-06-26T18:08:28.136Z", "surfaceArea":2618, "volume":194000, "widthOfLocks":84, "secondaryWidthOfLocks":null, "yearCompleted":1974, "congDist":"Congressional District 12, Illinois", "city":"Modoc", "county":"Randolph", "aiannh":null, "websiteUrl":"https://www.usace.army.mil/Missions/Civil-Works/Dam-Safety-Program/Article/2870967/dam-safety-program/", "coreTypeIds":"2", "damTypeIds":"11;9", "fedConstructionIds":"1", "fedDesignIds":"1", "fedFundingIds":"1", "fedInspectionIds":"1", "fedOperationIds":"1", "fedOtherIds":"1", "fedOwnerIds":"1", "fedRegulatoryIds":"1", "formerNames":"Kaskaskia Lock & Dam;Kaskaskia River", "foundationTypeIds":"3", "nonFederalDamOnFederalId":0, "designerNames":"CEMVS", "otherNames":"Kaskaskia Lock and Dam", "ownerNames":"USACE - St. Louis District", "ownerTypeIds":"3", "primaryDamTypeId":11, "primaryOwnerTypeId":3, "primaryPurposeId":3, "purposeIds":"3;4;5", "dsacId":5, "femaRegion":"5", "lastEapExcerDate":"2023-12-04T12:00:00.000Z", "dataUpdated":"2025-06-03T12:00:00.000Z", "usaceDistrict":"St. Louis District", "noConsequencesId":1, "secretaryAgricultureBuiltId":null, "nrcsWatershedAuthorizationId":null, "isAssociatedStructureId":"No", "fedRegulatedId":"Yes", "inundationNidAddedId":2, "damStatusId":2, "huc06":"071402", "doi_region":null, "doi_region_name":"Great Lakes", "doi_region_number":3, "thirtyYearAverage":11.7049, "tenthPercentile":10.7677, "ninetiethPercentile":11.038 }, "id":717018, "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/717018?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/717018?f=jsonld" }, { "rel":"alternate", "type":"text/html", "title":"This document as HTML", "href":"https://api.wwdh.internetofwater.app/collections/usace-edr/items/717018?f=html" }, { "rel":"collection", "type":"application/json", "title":"USACE Access2Water API", "href":"https://api.wwdh.internetofwater.app/collections/usace-edr" } ] }