{ "bbox":null, "type":"Feature", "geometry":{ "bbox":null, "type":"Point", "coordinates":[ -85.95806, 40.71667 ] }, "properties":{ "provider":"LRL", "code":"Mississinewa", "slug":"mississinewa", "elevation":712.0, "horizontal_datum":"NAD27", "vertical_datum":"NGVD29", "state":"IN", "kind":"PROJECT", "nearest_city":"Peru, IN", "public_name":"Mississinewa Lake", "location_code":1135109, "nsid":null, "aliases":{ "NIDID":"IN03004" }, "timeseries":[ { "tsid":"Mississinewa.Stor.Inst.1Hour.0.lrldlb-comp", "label":"Conservation Storage", "base_parameter":"Stor", "parameter":"Stor", "unit":"ac-ft", "unit_long_name":"Acre-feet", "latest_time":"2026-04-09T10:00:00Z", "latest_value":85694.2, "delta24h":null, "sort_order":13, "results":null }, { "tsid":"Mississinewa.Flow-Inflow.Ave.1Hour.6Hours.lrldlb-comp", "label":"Inflow", "base_parameter":"Flow", "parameter":"Flow-Inflow", "unit":"cfs", "unit_long_name":"Cubic feet per second", "latest_time":"2026-04-09T10:00:00Z", "latest_value":0.0, "delta24h":null, "sort_order":6, "results":null }, { "tsid":"Mississinewa.Stor.Inst.1Hour.0.lrldlb-comp", "label":"Flood Storage", "base_parameter":"Stor", "parameter":"Stor", "unit":"ac-ft", "unit_long_name":"Acre-feet", "latest_time":"2026-04-09T10:00:00Z", "latest_value":85694.2, "delta24h":null, "sort_order":11, "results":null }, { "tsid":"Mississinewa.Flow-Outflow.Inst.0.0.lrldlb-comp", "label":"Outflow", "base_parameter":"Flow", "parameter":"Flow-Outflow", "unit":"cfs", "unit_long_name":"Cubic feet per second", "latest_time":"2026-04-09T10:00:00Z", "latest_value":3058.26, "delta24h":null, "sort_order":7, "results":null }, { "tsid":"Mississinewa.Elev.Inst.0.0.lrldlb-rev", "label":"Elevation", "base_parameter":"Elev", "parameter":"Elev", "unit":"ft", "unit_long_name":"Feet", "latest_time":"2026-04-09T10:00:00Z", "latest_value":740.1, "delta24h":null, "sort_order":1, "results":null }, { "tsid":"Mississinewa.Precip.Total.~1Day.1Day.lrldlb-rev", "label":"Precipitation", 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normal", "label":"Bottom of Normal", "parameter":"Stor", "base_parameter":"Stor", "tsid":"Mississinewa.Stor.Inst.0.Bottom of Normal", "latest_value":23300, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.guide curve", "label":"Guide Curve", "parameter":"Stor", "base_parameter":"Stor", "tsid":"Mississinewa.Stor.Inst.0.Guide Curve", "latest_value":23300, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.streambed", "label":"Streambed", "parameter":"Stor", "base_parameter":"Stor", "tsid":"Mississinewa.Stor.Inst.0.Streambed", "latest_value":0, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of conservation", "label":"Top of Conservation", "parameter":"Stor", "base_parameter":"Stor", "tsid":"Mississinewa.Stor.Inst.0.Top of Conservation", "latest_value":75200, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of dam", "label":"Top of Dam", "parameter":"Stor", "base_parameter":"Stor", "tsid":"Mississinewa.Stor.Inst.0.Top of Dam", "latest_value":669687, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of flood", "label":"Top of Flood", "parameter":"Stor", "base_parameter":"Stor", "tsid":"Mississinewa.Stor.Inst.0.Top of Flood", "latest_value":368400, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of normal", "label":"Top of Normal", "parameter":"Stor", "base_parameter":"Stor", "tsid":"Mississinewa.Stor.Inst.0.Top of Normal", "latest_value":23300, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of overflow", "label":"Top of Overflow", "parameter":"Stor", "base_parameter":"Stor", "tsid":"Mississinewa.Stor.Inst.0.Top of Overflow", "latest_value":368400, "units":"ac-ft", "units_long_name":"Acre-feet" } ], "id":549736, "associatedStructuresCount":0, "conditionAssessDate":null, "conditionAssessDetail":null, "conditionAssessId":6, "damHeight":null, "damLength":8000, "distance":null, "drainageArea":809, "eapId":1, "dsacAssignedDate":"2019-05-30T12:00:00.000Z", "eapMeetsGuidelinesId":1, "emergencyContactsUpdated":"2025-01-31T12:00:00.000Z", "eapLastRevDate":"2019-09-05T12:00:00.000Z", "enforcementAuthorityId":0, "federalId":"IN03004", "oldFederalId":"IN03004", "hazardId":4, "hydraulicHeight":122, "inspectionAuthorityId":0, "inspectionDate":"2024-05-23T12:00:00.000Z", "inspectionFrequency":5, "jurisdictionAuthorityId":0, "latitude":40.7155032220001, "lengthOfLocks":0, "secondaryLengthOfLocks":null, "longitude":-85.958138882, "maxDischarge":122400, "maxStorage":368400, "nidHeight":140, "nidStorage":368400, "normalStorage":75200, "numberOfLocks":0, "operationalStatusDate":"2019-05-30T12:00:00.000Z", "operationalStatusId":1, "originalDesignerName":null, "otherStructureId":null, "permittingAuthorityId":0, "politicalPartyId":null, "privateDamId":null, "projectDescription":"The U.S. Army Corps of Engineers (USACE) built the Mississinewa Lake Dam in 1967 across the Mississinewa River near the town of Peru, Indiana as western most of 3 dams to reduce the risk of flooding downstream on the northern portion of the Wabash River. The water held back by the dam forms a reservoir called Mississinewa Lake. USACE Chicago District operates and maintains the dam. The reservoir stores snow melt and rainfall runoff from late winter through early summer. Periodic releases of water from the reservoir occur throughout the year to maintain seasonally specified pool levels. Additionally, the reservoir provides recreational opportunities both in the lake and downstream. The dam structure is primarily an earthen embankment approximately 8,000 feet long and 140 feet high at the tallest point. Normal discharges from the dam are through a 16-foot diameter conduit near the center of the dam controlled by 3 large steel gates. If the reservoir levels rise above elevation 779 NGVD, flow will begin to go through an unlined, uncontrolled auxiliary spillway that is approximately 1,500 feet wide. Water from the spillway would be directed into the Wabash River approximately 3.5 miles upstream of the confluence of the Mississinewa and Wabash Rivers. In the dam's more than 50-year history, the Mississinewa Dam has reduced downstream flood damages by more than an estimated $645 million. USACE made major repairs to the dam from 2003 to 2006 to address settlement issues. The pool of record at the dam occurred in July 2015 and the dam performed as intended without any problems. The reservoir level was 1.5 feet below the sill elevation of the spillway, so no discharges were observed through the spillway.", "riskCharSummary":"The Mississinewa Dam reduces the risk of flooding to downstream communities, however, the dam does not eliminate the risk of flooding. Downstream of the dam are the Cities of Peru, Logansport, Delphi, Lafayette, and Terra Haute, Indiana along with numerous other small towns and communities along the Wabash River all the way to the Ohio River. The most likely scenario that could result in downstream flooding from Mississinewa Dam would be a high-volume release of water from the dam's spillway during significant storm events. When the water level in the reservoir gets above the spillway sill, water is released to maintain the structural integrity of the dam. The spillway bypasses flow away from the lower Mississinewa River and discharges into the Wabash River upstream of the confluence of the 2 rivers. Numerous local roads, such as W 700 S, E 200 S (State Route 124), E 100 S, W Elliott Road, S 800 W, and E 40 N (E River Road), could become impassable in the event of discharges occurring through the spillway. The design of the spillway is intended to release less than or no more than equal to the amount of water coming into the reservoir. Large releases from the spillway could create conditions similar to how the Wabash River might behave if the dam did not exist. In addition, as the reservoir level increases, flooding will also occur upstream of the dam as the pool enlarges and extends nearly to the City of Marion, Indiana, almost 17 miles to the southeast of the dam, impacting many roads in between.\n\nA very unlikely, but far more devasting scenario that would produce significant flooding would be an extreme rainfall event resulting in water flowing over the earthen dam, eroding the dam and leading to a breach. If such an event to occurs, an uncontrolled surge of water would flow out of the reservoir and flood downstream communities. Peoria, IN, which is located immediately below the dam, would be in immediate danger and followed by Peru, IN. Logansport, Lafayette, and other towns and cities along the Wabash River down to the Ohio River have less awareness of the dam, but will also have more warning time to respond, should a flood occur. In the scenarios described above, the floodwaters could be swift and deep, overtopping levees, and destroying buildings and key infrastructure. Those caught unaware and unable to evacuate could perish. In the less likely breach scenario, the water depth, property damage, and lives lost could be far greater.", "riskManagementMeasures":"USACE is taking several steps to reduce the risk to the public. USACE staff are continuously on-site to operate and maintain the dam. USACE works closely with state and local emergency managers, regularly conducts emergency exercises, and routinely updates the emergency action plan (EAP) for the dam. USACE also conducts rigorous inspection, monitoring, and surveillance of the dam, especially during high water events. USACE also closely follows rainfall forecasts to determine when high water events may occur and provide information for any necessary flood warnings. USACE continues to work with local communities to help them understand how they can better prepare for a flood.", "riverName":"MISSISSINEWA RIVER", "separateStructuresCount":0, "sourceAgency":"US Army Corps of Engineers", "spillwayTypeId":3, "spillwayWidth":1550, "stateFedId":"IN03004", "stateRegulatoryAgency":null, "stateRegulatedId":0, "structuralHeight":140, "submitDate":"2023-10-24T15:21:19.003Z", "surfaceArea":3200, "volume":4435000, "widthOfLocks":0, "secondaryWidthOfLocks":null, "yearCompleted":1967, "congDist":"Congressional District 02, Indiana", "city":"PERU", "county":"Miami", "aiannh":null, "websiteUrl":"https://www.usace.army.mil/Missions/Civil-Works/Dam-Safety-Program/Article/2870967/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":"CELRL", "otherNames":"Mississinewa Lake", "ownerNames":"USACE - Chicago District", "ownerTypeIds":"3", "primaryDamTypeId":8, "primaryOwnerTypeId":3, "primaryPurposeId":9, "purposeIds":"9;5", "dsacId":4, "femaRegion":"5", "lastEapExcerDate":"2024-01-17T12:00:00.000Z", "dataUpdated":"2025-04-17T12:00:00.000Z", "usaceDistrict":"Chicago District", "noConsequencesId":0, "secretaryAgricultureBuiltId":null, "nrcsWatershedAuthorizationId":null, "isAssociatedStructureId":"No", "fedRegulatedId":"Yes", "inundationNidAddedId":1, "damStatusId":2, "huc06":"051201", "doi_region":null, "doi_region_name":"Great Lakes", "doi_region_number":3, "thirtyYearAverage":69.8892, "tenthPercentile":38.6754, "ninetiethPercentile":106.4602 }, "id":1135109, "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/1135109?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/1135109?f=jsonld" }, { "rel":"alternate", "type":"text/html", "title":"This document as HTML", "href":"https://api.wwdh.internetofwater.app/collections/usace-edr/items/1135109?f=html" }, { "rel":"collection", "type":"application/json", "title":"USACE Access2Water API", "href":"https://api.wwdh.internetofwater.app/collections/usace-edr" } ] }