{ "bbox":null, "type":"Feature", "geometry":{ "bbox":null, "type":"Point", "coordinates":[ -92.88733, 40.8261 ] }, "properties":{ "provider":"NWK", "code":"RATN", "slug":"ratn", "elevation":null, "horizontal_datum":"WGS84", "vertical_datum":"", "state":"IA", "kind":"PROJECT", "nearest_city":"Oskaloosa", "public_name":"Rathbun Dam & Reservoir", "location_code":5673030, "nsid":null, "aliases":{ "NIDID":"IA00016", "USGS Station Number":"06903880" }, "timeseries":[ { "tsid":"RATN.Flow-Out.Ave.1Day.1Day.Best-NWK", "label":"Outflow", "base_parameter":"Flow", "parameter":"Flow-Out", "unit":"cfs", "unit_long_name":"Cubic feet per second", "latest_time":"2026-04-14T12:00:00Z", "latest_value":416.8, "delta24h":null, "sort_order":7, "results":null }, { "tsid":"RATN.Stor.Inst.1Hour.0.Best-NWK", "label":"Flood Storage", "base_parameter":"Stor", "parameter":"Stor", "unit":"ac-ft", "unit_long_name":"Acre-feet", "latest_time":"2026-04-14T22:00:00Z", "latest_value":253098.82, "delta24h":null, 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"units_long_name":"Feet" }, { "slug":"elev.top of flood", "label":"Top of Flood", "parameter":"Elev", "base_parameter":"Elev", "tsid":"RATN.Elev.Inst.0.Top of Flood", "latest_value":926, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of multi-purpose", "label":"Top of Multi-Purpose", "parameter":"Elev", "base_parameter":"Elev", "tsid":"RATN.Elev.Inst.0.Top of Multi-Purpose", "latest_value":904, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of surcharge", "label":"Top of Surcharge", "parameter":"Elev", "base_parameter":"Elev", "tsid":"RATN.Elev.Inst.0.Top of Surcharge", "latest_value":940, "units":"ft", "units_long_name":"Feet" }, { "slug":"stor.bottom of conservation", "label":"Bottom of Conservation", "parameter":"Stor", "base_parameter":"Stor", "tsid":"RATN.Stor.Inst.0.Bottom of Conservation", "latest_value":0, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.spillway crest", "label":"Spillway Crest", "parameter":"Stor", "base_parameter":"Stor", "tsid":"RATN.Stor.Inst.0.Spillway Crest", "latest_value":570533, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of conservation", "label":"Top of Conservation", "parameter":"Stor", "base_parameter":"Stor", "tsid":"RATN.Stor.Inst.0.Top of Conservation", "latest_value":221360, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of flood", "label":"Top of Flood", "parameter":"Stor", "base_parameter":"Stor", "tsid":"RATN.Stor.Inst.0.Top of Flood", "latest_value":570533, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of surcharge", "label":"Top of Surcharge", "parameter":"Stor", "base_parameter":"Stor", "tsid":"RATN.Stor.Inst.0.Top of Surcharge", "latest_value":939392, "units":"ac-ft", "units_long_name":"Acre-feet" } ], "id":549876, "associatedStructuresCount":0, "conditionAssessDate":null, "conditionAssessDetail":null, "conditionAssessId":6, "damHeight":null, "damLength":10120, "distance":null, "drainageArea":549, "eapId":1, "dsacAssignedDate":"2018-09-06T12:00:00.000Z", "eapMeetsGuidelinesId":1, "emergencyContactsUpdated":"2024-09-30T12:00:00.000Z", "eapLastRevDate":"2020-09-30T12:00:00.000Z", "enforcementAuthorityId":0, "federalId":"IA00016", "oldFederalId":"IA00016", "hazardId":4, "hydraulicHeight":92, "inspectionAuthorityId":0, "inspectionDate":"2021-03-15T12:00:00.000Z", "inspectionFrequency":5, "jurisdictionAuthorityId":0, "latitude":40.8261723100001, "lengthOfLocks":0, "secondaryLengthOfLocks":null, "longitude":-92.887485301, "maxDischarge":45600, "maxStorage":552000, "nidHeight":100, "nidStorage":552000, "normalStorage":205359, "numberOfLocks":0, "operationalStatusDate":"2018-09-06T12:00:00.000Z", "operationalStatusId":1, "originalDesignerName":null, "otherStructureId":null, "permittingAuthorityId":0, "politicalPartyId":null, "privateDamId":null, "projectDescription":"The U.S. Army Corps of Engineers (USACE) constructed Rathbun Dam, completing in 1969. Rathbun Dam is located on the Chariton River in Appanoose County, approximately five miles north of Centerville, Iowa. Downstream of the dam is the community of Rathbun, Iowa and agricultural land. The dam was authorized for flood control, water quality, water supply, recreation, fish & wildlife enhancement, and navigation. Rathbun Dam has reduced flood damage by more than an estimated $371.6 million (2018 price level) from 1969 to 2016. The dam is composed of two separate rolled earthen embankments, the main embankment and the Buck Branch embankment. A connection channel located within 1300 feet of the main embankment and within 900 feet of the Buck Branch embankment serves to create a single reservoir. The main embankment is 8,160 feet long and stands up to 100 feet above the stream bed. The Buck Branch embankment is 1,960 feet long and 75 feet above the floodplain. There is a 500-foot-wide uncontrolled notch spillway with anchored concrete sill located approximately 3,000 feet west of the main embankment abutment.", "riskCharSummary":"USACE 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 Rathbun\u2019s storage capacity can cause the release of water through the uncontrolled spillway to prevent overtopping and failure of dam, even if the river downstream is at or beyond capacity. This can result in flooding at downstream areas or can worsen already existing flooding downstream due to the rivers being over capacity. \n\nUSACE completed a risk assessment for Rathbun Dam in April 2018 to determine the ability of USACE to meet the flood risk management goals of the dam. As a result, the risk due to dam breach is characterized as low. In an extreme flood scenario, inflows into the lake may exceed the storage and release capacity of the dam, and overtopping may occur. If overtopping occurs the earthen embankment of the dam could erode leading to a sudden release of water downstream. This would result in extreme flooding in the community of Rathbun and the agricultural land downstream.", "riskManagementMeasures":"USACE 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":"CHARITON RIVER", "separateStructuresCount":0, "sourceAgency":"US Army Corps of Engineers", "spillwayTypeId":3, "spillwayWidth":500, "stateFedId":"IA00016", "stateRegulatoryAgency":null, "stateRegulatedId":0, "structuralHeight":100, "submitDate":"2023-02-16T17:25:33.683Z", "surfaceArea":11013, "volume":5352000, "widthOfLocks":0, "secondaryWidthOfLocks":null, "yearCompleted":1969, "congDist":"Congressional District 03, Iowa", "city":"RATHBUN", "county":"Appanoose", "aiannh":null, "websiteUrl":"https://www.nwk.usace.army.mil/Missions/Civil-Works/Dam-Safety-Program/", "coreTypeIds":null, "damTypeIds":"8", "fedConstructionIds":"1", "fedDesignIds":"1", "fedFundingIds":"1", "fedInspectionIds":"1", "fedOperationIds":"1", "fedOtherIds":"1", "fedOwnerIds":"1", "fedRegulatoryIds":"1", "formerNames":null, "foundationTypeIds":null, "nonFederalDamOnFederalId":0, "designerNames":null, "otherNames":"Rathbun Lake", "ownerNames":"USACE - Kansas City District", "ownerTypeIds":"3", "primaryDamTypeId":8, "primaryOwnerTypeId":3, "primaryPurposeId":9, "purposeIds":"9;12;3;4;5", "dsacId":4, "femaRegion":"7", "lastEapExcerDate":"2025-01-23T12:00:00.000Z", "dataUpdated":"2025-07-03T12:00:00.000Z", "usaceDistrict":"Kansas City District", "noConsequencesId":0, "secretaryAgricultureBuiltId":null, "nrcsWatershedAuthorizationId":null, "isAssociatedStructureId":"No", "fedRegulatedId":"Yes", "inundationNidAddedId":1, "damStatusId":2, "huc06":"102802", "doi_region":null, "doi_region_name":"Mississippi Basin", "doi_region_number":4, "thirtyYearAverage":288.2634, "tenthPercentile":241.5652, "ninetiethPercentile":332.5155 }, "id":5673030, "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/5673030?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/5673030?f=jsonld" }, { "rel":"alternate", "type":"text/html", "title":"This document as HTML", "href":"https://api.wwdh.internetofwater.app/collections/usace-edr/items/5673030?f=html" }, { "rel":"collection", "type":"application/json", "title":"USACE Access2Water API", "href":"https://api.wwdh.internetofwater.app/collections/usace-edr" } ] }