{ "bbox":null, "type":"Feature", "geometry":{ "bbox":null, "type":"Point", "coordinates":[ -94.90265, 38.65388 ] }, "properties":{ "provider":"NWK", "code":"HILS", "slug":"hils", "elevation":null, "horizontal_datum":"WGS84", "vertical_datum":"", "state":"KS", "kind":"PROJECT", "nearest_city":"Olathe", "public_name":"Hillsdale Dam & Reservoir", "location_code":5548030, "nsid":null, "aliases":{ "NIDID":"KS82201", "USGS Station Number":"06914995" }, "timeseries":[ { "tsid":"HILS.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":8.0, "delta24h":null, "sort_order":7, "results":null }, { "tsid":"HILS.Stor.Inst.1Hour.0.Best-NWK", "label":"Conservation Storage", "base_parameter":"Stor", "parameter":"Stor", "unit":"ac-ft", "unit_long_name":"Acre-feet", "latest_time":"2026-04-14T22:00:00Z", "latest_value":84966.2, "delta24h":null, "sort_order":13, "results":null }, { "tsid":"HILS.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":84966.2, "delta24h":null, "sort_order":11, "results":null }, { "tsid":"HILS.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":"2026-04-14T12:00:00Z", "latest_value":4450.0, "delta24h":null, "sort_order":6, "results":null }, { "tsid":"HILS.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":918.53, "delta24h":null, "sort_order":1, "results":null } ], "name":"Hillsdale Dam & Reservoir", "hasResopsAverages":"true", "nidId":"KS82201", "nidid":"", "levels":[ { "slug":"elev.bottom of conservation", "label":"Bottom of Conservation", "parameter":"Elev", "base_parameter":"Elev", "tsid":"HILS.Elev.Inst.0.Bottom of Conservation", "latest_value":868, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.spillway crest", "label":"Spillway Crest", "parameter":"Elev", "base_parameter":"Elev", "tsid":"HILS.Elev.Inst.0.Spillway Crest", "latest_value":935, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.streambed", "label":"Streambed", "parameter":"Elev", "base_parameter":"Elev", "tsid":"HILS.Elev.Inst.0.Streambed", "latest_value":852, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of conservation", "label":"Top of Conservation", "parameter":"Elev", "base_parameter":"Elev", "tsid":"HILS.Elev.Inst.0.Top of Conservation", "latest_value":917, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of dam", "label":"Top of Dam", "parameter":"Elev", "base_parameter":"Elev", "tsid":"HILS.Elev.Inst.0.Top of Dam", "latest_value":952.2, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of flood", "label":"Top of Flood", "parameter":"Elev", "base_parameter":"Elev", "tsid":"HILS.Elev.Inst.0.Top of Flood", "latest_value":931, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of multi-purpose", "label":"Top of Multi-Purpose", "parameter":"Elev", "base_parameter":"Elev", "tsid":"HILS.Elev.Inst.0.Top of Multi-Purpose", "latest_value":917, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of surcharge", "label":"Top of Surcharge", "parameter":"Elev", "base_parameter":"Elev", "tsid":"HILS.Elev.Inst.0.Top of Surcharge", "latest_value":948, "units":"ft", "units_long_name":"Feet" }, { "slug":"stor.bottom of conservation", "label":"Bottom of Conservation", "parameter":"Stor", "base_parameter":"Stor", "tsid":"HILS.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":"HILS.Stor.Inst.0.Spillway Crest", "latest_value":196546, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of conservation", "label":"Top of Conservation", "parameter":"Stor", "base_parameter":"Stor", "tsid":"HILS.Stor.Inst.0.Top of Conservation", "latest_value":77415, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of flood", "label":"Top of Flood", "parameter":"Stor", "base_parameter":"Stor", "tsid":"HILS.Stor.Inst.0.Top of Flood", "latest_value":163919, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of surcharge", "label":"Top of Surcharge", "parameter":"Stor", "base_parameter":"Stor", "tsid":"HILS.Stor.Inst.0.Top of Surcharge", "latest_value":325591, "units":"ac-ft", "units_long_name":"Acre-feet" } ], "id":550359, "associatedStructuresCount":0, "conditionAssessDate":null, "conditionAssessDetail":null, "conditionAssessId":6, "damHeight":null, "damLength":11640, "distance":null, "drainageArea":144, "eapId":1, "dsacAssignedDate":"2022-05-23T12:00:00.000Z", "eapMeetsGuidelinesId":1, "emergencyContactsUpdated":"2024-10-21T12:00:00.000Z", "eapLastRevDate":"2020-09-30T12:00:00.000Z", "enforcementAuthorityId":0, "federalId":"KS82201", "oldFederalId":"KS82201", "hazardId":4, "hydraulicHeight":100, "inspectionAuthorityId":0, "inspectionDate":"2025-03-27T12:00:00.000Z", "inspectionFrequency":5, "jurisdictionAuthorityId":0, "latitude":38.6536320970001, "lengthOfLocks":0, "secondaryLengthOfLocks":null, "longitude":-94.9050695459999, "maxDischarge":4750, "maxStorage":160000, "nidHeight":105, "nidStorage":160000, "normalStorage":76000, "numberOfLocks":0, "operationalStatusDate":"2022-05-23T12:00:00.000Z", "operationalStatusId":1, "originalDesignerName":null, "otherStructureId":null, "permittingAuthorityId":0, "politicalPartyId":null, "privateDamId":null, "projectDescription":"The U.S. Army Corps of Engineers (USACE) constructed Hillsdale Dam, completing in 1982. Hillsdale Dam is located approximately 6 miles upstream of Paola, Kansas. Big Bull Creek is the lake\u2019s main tributary with Little Bull Creek also emptying into the lake. Discharges from the reservoir flow from Big Bull Creek into the Marais des Cygnes River. The dam was authorized for flood control, water supply, water quality control, recreation, and fish & wildlife enhancement. Hillsdale Dam has reduced flood damage by more than an estimated $16.6 million (2020 price level) from 2013 to 2019. The dam is a rolled earthfill embankment approximately 9,050 feet long with an uncontrolled spillway located 2,500 feet beyond its right 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 flooding. Extreme rainfall events that exceed the Hillsdale Lake storage capacity can require the release of water through the outlet works or the uncontrolled spillway, even if the rivers and creeks are at or beyond capacity to prevent overtopping and failure of the dam. This can result in flooding areas downstream including agricultural land and the community of Paola, 4-7 miles downstream of the dam. \nUSACE completed a risk assessment for Hillsdale Dam in June 2020 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 very low. If a dam breach were to occur, this would result in the immediate release of water, flooding the agricultural land downstream of the dam and the community of Paola, KS.", "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 reservoir levels. Rainfall forecasts and reservoir levels are routinely monitored and if a high reservoir 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":"BIG BULL CREEK", "separateStructuresCount":0, "sourceAgency":"US Army Corps of Engineers", "spillwayTypeId":3, "spillwayWidth":50, "stateFedId":"KS82201", "stateRegulatoryAgency":null, "stateRegulatedId":0, "structuralHeight":105, "submitDate":"2023-02-16T17:25:30.357Z", "surfaceArea":4580, "volume":7318887, "widthOfLocks":0, "secondaryWidthOfLocks":null, "yearCompleted":1981, "congDist":"Congressional District 03, Kansas", "city":"PAOLA", "county":"Miami", "aiannh":null, "websiteUrl":"https://www.nwk.usace.army.mil/Missions/Civil-Works/Dam-Safety-Program/", "coreTypeIds":"3", "damTypeIds":"8", "fedConstructionIds":"1", "fedDesignIds":"1", "fedFundingIds":"1", "fedInspectionIds":"1", "fedOperationIds":"1", "fedOtherIds":"1", "fedOwnerIds":"1", "fedRegulatoryIds":"1", "formerNames":null, "foundationTypeIds":"1;3", "nonFederalDamOnFederalId":0, "designerNames":"CENWK", "otherNames":"Hillsdale Lake", "ownerNames":"USACE - Kansas City District", "ownerTypeIds":"3", "primaryDamTypeId":8, "primaryOwnerTypeId":3, "primaryPurposeId":9, "purposeIds":"9;12;4;5;8", "dsacId":5, "femaRegion":"7", "lastEapExcerDate":"2025-03-05T12:00:00.000Z", "dataUpdated":"2025-07-01T12:00:00.000Z", "usaceDistrict":"Kansas City District", "noConsequencesId":0, "secretaryAgricultureBuiltId":null, "nrcsWatershedAuthorizationId":null, "isAssociatedStructureId":"No", "fedRegulatedId":"Yes", "inundationNidAddedId":1, "damStatusId":2, "huc06":"102901", "doi_region":"MB", "doi_region_name":"Missouri Basin", "doi_region_number":5, "thirtyYearAverage":93.0795, "tenthPercentile":83.1799, "ninetiethPercentile":101.4381 }, "id":5548030, "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/5548030?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/5548030?f=jsonld" }, { "rel":"alternate", "type":"text/html", "title":"This document as HTML", "href":"https://api.wwdh.internetofwater.app/collections/usace-edr/items/5548030?f=html" }, { "rel":"collection", "type":"application/json", "title":"USACE Access2Water API", "href":"https://api.wwdh.internetofwater.app/collections/usace-edr" } ] }