{ "bbox":null, "type":"Feature", "geometry":{ "bbox":null, "type":"Point", "coordinates":[ -93.40549, 38.263 ] }, "properties":{ "provider":"NWK", "code":"HAST", "slug":"hast", "elevation":null, "horizontal_datum":"WGS84", "vertical_datum":"NGVD29", "state":"MO", "kind":"PROJECT", "nearest_city":"Warsaw", "public_name":"Harry S Truman Dam & Reservoir", "location_code":15347030, "nsid":null, "aliases":{ "NIDID":"MO20725" }, "timeseries":[ { "tsid":"HAST.Elev.Inst.1Hour.0.Best-NWK", "label":"Elevation", "base_parameter":"Elev", "parameter":"Elev", "unit":"ft", "unit_long_name":"Feet", "latest_time":"2026-04-14T22:00:00Z", "latest_value":709.05, "delta24h":null, "sort_order":1, "results":null }, { "tsid":"HAST.Flow-In.Ave.1Day.1Day.Best-NWK", "label":"Inflow", "base_parameter":"Flow", "parameter":"Flow-In", "unit":"cfs", "unit_long_name":"Cubic feet per second", "latest_time":"2026-04-14T06:00:00Z", "latest_value":11125.0, "delta24h":null, "sort_order":6, "results":null }, { 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"units_long_name":"Feet" }, { "slug":"elev.top of flood", "label":"Top of Flood", "parameter":"Elev", "base_parameter":"Elev", "tsid":"HAST.Elev.Inst.0.Top of Flood", "latest_value":739.6, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of multi-purpose", "label":"Top of Multi-Purpose", "parameter":"Elev", "base_parameter":"Elev", "tsid":"HAST.Elev.Inst.0.Top of Multi-Purpose", "latest_value":706.02, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of surcharge", "label":"Top of Surcharge", "parameter":"Elev", "base_parameter":"Elev", "tsid":"HAST.Elev.Inst.0.Top of Surcharge", "latest_value":751.1, "units":"ft", "units_long_name":"Feet" }, { "slug":"stor.bottom of conservation", "label":"Bottom of Conservation", "parameter":"Stor", "base_parameter":"Stor", "tsid":"HAST.Stor.Inst.0.Bottom of Conservation", "latest_value":379416, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.spillway crest", "label":"Spillway Crest", "parameter":"Stor", "base_parameter":"Stor", "tsid":"HAST.Stor.Inst.0.Spillway Crest", "latest_value":590546, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of conservation", "label":"Top of Conservation", "parameter":"Stor", "base_parameter":"Stor", "tsid":"HAST.Stor.Inst.0.Top of Conservation", "latest_value":1180617, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of flood", "label":"Top of Flood", "parameter":"Stor", "base_parameter":"Stor", "tsid":"HAST.Stor.Inst.0.Top of Flood", "latest_value":5189985, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of surcharge", "label":"Top of Surcharge", "parameter":"Stor", "base_parameter":"Stor", "tsid":"HAST.Stor.Inst.0.Top of Surcharge", "latest_value":8097923, "units":"ac-ft", "units_long_name":"Acre-feet" } ], "id":550261, "associatedStructuresCount":1, "conditionAssessDate":null, "conditionAssessDetail":null, "conditionAssessId":6, "damHeight":98, "damLength":5000, "distance":null, "drainageArea":11500, "eapId":1, "dsacAssignedDate":"2022-11-10T12:00:00.000Z", "eapMeetsGuidelinesId":1, "emergencyContactsUpdated":"2024-11-08T12:00:00.000Z", "eapLastRevDate":"2018-09-30T12:00:00.000Z", "enforcementAuthorityId":0, "federalId":"MO20725", "oldFederalId":"MO20725", "hazardId":4, "hydraulicHeight":98, "inspectionAuthorityId":0, "inspectionDate":"2023-06-29T12:00:00.000Z", "inspectionFrequency":5, "jurisdictionAuthorityId":0, "latitude":38.263754631, "lengthOfLocks":0, "secondaryLengthOfLocks":null, "longitude":-93.4035699249999, "maxDischarge":284000, "maxStorage":5202000, "nidHeight":98, "nidStorage":5202000, "normalStorage":1203404, "numberOfLocks":0, "operationalStatusDate":"2022-11-10T12:00:00.000Z", "operationalStatusId":1, "originalDesignerName":null, "otherStructureId":null, "permittingAuthorityId":0, "politicalPartyId":null, "privateDamId":null, "projectDescription":"The U.S. Army Corps of Engineers (USACE) constructed Harry S. Truman Dam, completing in 1979. Truman Dam is located on the Osage River at roughly mile 175 in Benton County, Missouri, about 1-1/2 miles northwest of Warsaw, Missouri. Downstream of the dam is Warsaw, Missouri, Bagnell Dam, and Lake of the Ozarks. The dam was authorized for flood control, hydroelectric power, water supply, recreation, and fish & wildlife enhancement. Truman Dam has reduced flood damage by more than an estimated $3.7 billion (2017 price level) from 1981 to 2016. The dam is 5,100 feet long of which 4,100 feet is compacted earth and rock fill embankment and the rest is composed of concrete structures including a powerhouse, spillway and non-overflow sections. Additionally, four appurtenant structures including three rim dikes and the Sterett Creek Dike along US Highway 65 complete the reservoir rim.", "riskCharSummary":"USACE completed a risk assessment for Harry S. Truman Dam in November 2022 to determine the ability of USACE to meet the flood risk management goals of the dam. As a result, the project\u2019s risk is characterized as low. If an extreme flood event occurs, inflows into the reservoir may exceed than the storage and release capacity of the dam, and overtopping may occur. If overtopping occurs the earthen embankment portion of dam could erode leading to a sudden release of water downstream. This would result in deadly flooding in Warsaw, Missouri and high inflows into Lake of the Ozarks causing damage to Bagnell Dam leading to further flooding at downstream communities along the Osage and Missouri Rivers including St. Louis, Missouri. \n\nUSACE is confident that the dam is solidly built, well maintained, and will continue to significantly reduce flood risks. However, the dam alone cannot eliminate all flooding. Extreme rainfall events that exceed the Truman Lake storage capacity require USACE to release water through spillway gates to prevent overtopping and failure of the dam. This can result in flooding at downstream areas.", "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. Regular maintenance and repairs are performed as needed to keep the dam functioning properly. \n\nUSACE will continue to work closely with state and local emergency managers, conduct emergency exercises and incorporate any new information into our collective emergency action plans. We will continue rigorous monitoring and surveillance of the dam and will do so more frequently when heavy rainfall causes high lake levels. Rainfall forecasts and lake levels are routinely monitored and if a high lake level is forecasted, we will promptly inform local and state emergency managers so that they can take protective actions, make flood warnings, and prepare for emergency responses. We will work with communities that are developing downstream of the dam to help them understand how they can better prepare for a potential flood.", "riverName":"OSAGE RIVER", "separateStructuresCount":2, "sourceAgency":"US Army Corps of Engineers", "spillwayTypeId":1, "spillwayWidth":190, "stateFedId":"MO20725", "stateRegulatoryAgency":null, "stateRegulatedId":0, "structuralHeight":98, "submitDate":"2023-02-18T03:46:01.937Z", "surfaceArea":55600, "volume":7411000, "widthOfLocks":0, "secondaryWidthOfLocks":null, "yearCompleted":1979, "congDist":"Congressional District 04, Missouri", "city":"WARSAW", "county":"Benton", "aiannh":null, "websiteUrl":"https://www.nwk.usace.army.mil/Missions/Civil-Works/Dam-Safety-Program/", "coreTypeIds":"3", "damTypeIds":"5;8;9", "fedConstructionIds":"1", "fedDesignIds":"1", "fedFundingIds":"1", "fedInspectionIds":"1", "fedOperationIds":"1", "fedOtherIds":"1", "fedOwnerIds":"1", "fedRegulatoryIds":"1", "formerNames":"Kaysinger Bluff Dam", "foundationTypeIds":"1", "nonFederalDamOnFederalId":0, "designerNames":"CENWK", "otherNames":"Harry S. 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