{ "bbox":null, "type":"Feature", "geometry":{ "bbox":null, "type":"Point", "coordinates":[ -88.94978, 38.0367 ] }, "properties":{ "provider":"MVS", "code":"Rend Lk", "slug":"rend%20lk", "elevation":null, "horizontal_datum":"", "vertical_datum":"", "state":"IL", "kind":"PROJECT", "nearest_city":"Herrin", "public_name":"Rend Lake Project", "location_code":773018, "nsid":null, "aliases":{ "NIDID":"IL00117" }, "timeseries":[ { "tsid":"Rend Lk TW-Big Muddy.Elev.Inst.30Minutes.0.lrgsShef-rev", "label":"Elevation Tailwater", "base_parameter":"Elev", "parameter":"Elev", "unit":"ft", "unit_long_name":"Feet", "latest_time":"2026-08-25T22:00:00Z", "latest_value":372.72, "delta24h":null, "sort_order":3, "results":null }, { "tsid":"Rend Lk-Big Muddy.Flow-Out.Ave.~1Day.1Day.lakerep-rev", "label":"Outflow", "base_parameter":"Flow", "parameter":"Flow-Out", "unit":"cfs", "unit_long_name":"Cubic feet per second", "latest_time":"2026-08-25T05:00:00Z", "latest_value":55.03, "delta24h":null, 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"units_long_name":"Acre-feet", "type":"CONSTANT" }, { "slug":"stor.top of surcharge", "label":"Top of Surcharge", "parameter":"Stor", "base_parameter":"Stor", "tsid":"Rend Lk.Stor.Inst.0.Top of Surcharge", "latest_value":618231, "units":"ac-ft", "units_long_name":"Acre-feet", "type":"CONSTANT" } ], "id":549746, "associatedStructuresCount":0, "conditionAssessDate":null, "conditionAssessDetail":null, "conditionAssessId":6, "damHeight":54, "damLength":10228, "distance":1, "drainageArea":488, "eapId":1, "dsacAssignedDate":"2022-08-11T12:00:00.000Z", "eapMeetsGuidelinesId":0, "emergencyContactsUpdated":"2024-08-16T12:00:00.000Z", "eapLastRevDate":"2013-08-08T12:00:00.000Z", "enforcementAuthorityId":1, "federalId":"IL00117", "oldFederalId":"IL00117", "hazardId":4, "hydraulicHeight":49, "inspectionAuthorityId":1, "inspectionDate":"2021-02-12T12:00:00.000Z", "inspectionFrequency":5, "jurisdictionAuthorityId":1, "latitude":38.0373276070001, "lengthOfLocks":0, "secondaryLengthOfLocks":null, "longitude":-88.961678532, "maxDischarge":87250, "maxStorage":607910, "nidHeight":54, "nidStorage":607910, "normalStorage":184675, "numberOfLocks":0, "operationalStatusDate":"2022-08-11T12:00:00.000Z", "operationalStatusId":1, "originalDesignerName":null, "otherStructureId":null, "permittingAuthorityId":1, "politicalPartyId":null, "privateDamId":null, "projectDescription":"The U.S. Army Corps of Engineers (USACE) operates and maintains more than 700 dams across the United States. Rend Lake Dam is a high hazard potential dam located on the Big Muddy River, 103.7 miles upstream of its confluence with the Mississippi River. Rend Lake Dam along with the southern half of the lake is located in Franklin County while the northern portion of the lake is located in Jefferson County Illinois. Rend Lake Dam is approximately 10 miles north-west of the City of Benton, Illinois and 75 miles southeast of St. Louis Missouri. The project authority is the Flood Control Act of 23 October 1962, House Document No. 541, 87th Congress, Second Session and amended by Public Law 88-122, eighty eighth congress. Construction of the project began in June 1965 and finished on 15 December 1971. The river was diverted through the outlet works on 1 September 1970 and filling of the reservoir began on 24 October 1970. The desired interim pool elevation was first reached on 23 February 1971 and reached full pool on 12 March 1973. The authorized project purposes include flood control, water supply, downstream water quality, recreation, fish and wildlife conservation, and area redevelopment.", "riskCharSummary":"Rend Lake Dam is a high hazard dam categorized as a Dam Safety Action Classification (DSAC) 4 based on the 2021 risk assessment which is considered low urgency in that there is low incremental risk. The dam reduces the risk to flooding to surrounding and downstream communities but does not eliminate all the risk. During large rainfall events the dam may reach thresholds when large quantities of water will have to be released that cause flooding downstream to prevent inducing additional risk even though the dam is performing as designed. In extremely rare conditions three modes of failure were identified in the risk assessment. In the unlikely scenario when the dam gets overtopped, or erosion of foundation material occurs during extreme precipitation and pool conditions could potentially lead to a breach. In a less likely situation the releases from the auxiliary spillway cause the spillway to fail and allow a breach or partial loss of pool.", "riskManagementMeasures":"USACE manages dam-related flood risks by continually monitoring the condition and health of the dam, prioritizing activities that will most impact the risks, and engaging upstream and downstream emergency managers and members of the public to raise awareness of the dam and support actions to prepare and be ready to respond in the case of a dam-related emergency. USACE works closely with local emergency managers to share what is known about the dam and support the development of local emergency and evacuation plans. USACE regularly updates the emergency action plan for the dam which include inundation maps that have been released to the public via NID. \nIn addition to emergency preparedness routine instrumentation, inspections, and risk assessments are conducted and increased surveillance occurs when hazards exceed pre-established thresholds to ensure the structures are performing as designed. Regular maintenance and repairs are performed as needed to keep the dam functioning properly. Subject matter experts are monitoring the weather, expected precipitation, regional conditions, and pool conditions to anticipate impacts, make projections, and advise on deviations in order to further reduce the risk of an extreme loading event.", "riverName":"BIG MUDDY RIVER", "separateStructuresCount":0, "sourceAgency":"US Army Corps of Engineers", "spillwayTypeId":3, "spillwayWidth":1235, "stateFedId":"IL00117", "stateRegulatoryAgency":null, "stateRegulatedId":1, "structuralHeight":54, "submitDate":"2023-08-04T11:38:56.193Z", "surfaceArea":18900, "volume":2278700, "widthOfLocks":0, "secondaryWidthOfLocks":null, "yearCompleted":1971, "congDist":"Congressional District 12, Illinois", "city":"BENTON", "county":"Franklin", "aiannh":null, "websiteUrl":"https://www.usace.army.mil/Missions/Civil-Works/Dam-Safety-Program/Article/2870967/dam-safety-program/", "coreTypeIds":"3", "damTypeIds":"11;8;9", "fedConstructionIds":"1", "fedDesignIds":"1", "fedFundingIds":"1", "fedInspectionIds":"1", "fedOperationIds":"1", "fedOtherIds":"1", "fedOwnerIds":"1", "fedRegulatoryIds":"1", "formerNames":null, "foundationTypeIds":"1;3", "nonFederalDamOnFederalId":0, "designerNames":"CEMVS", "otherNames":"Rend Lake", "ownerNames":"USACE - St. Louis District", "ownerTypeIds":"3", "primaryDamTypeId":11, "primaryOwnerTypeId":3, "primaryPurposeId":9, "purposeIds":"9;12;4;5;8", "dsacId":4, "femaRegion":"5", "lastEapExcerDate":"2024-04-16T12:00:00.000Z", "dataUpdated":"2025-02-04T12:00:00.000Z", "usaceDistrict":"St. Louis District", "noConsequencesId":0, "secretaryAgricultureBuiltId":null, "nrcsWatershedAuthorizationId":null, "isAssociatedStructureId":"No", "fedRegulatedId":"Yes", "inundationNidAddedId":1, "damStatusId":2, "huc06":"071401", "doi_region":null, "doi_region_name":"Great Lakes", "doi_region_number":3, "thirtyYearAverage":261.766, "tenthPercentile":218.881, "ninetiethPercentile":300.4735 }, "id":773018, "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/773018?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/773018?f=jsonld" }, { "rel":"alternate", "type":"text/html", "title":"This document as HTML", "href":"https://api.wwdh.internetofwater.app/collections/usace-edr/items/773018?f=html" }, { "rel":"collection", "type":"application/json", "title":"USACE Access2Water API", "href":"https://api.wwdh.internetofwater.app/collections/usace-edr" } ] }