{ "bbox":null, "type":"Feature", "geometry":{ "bbox":null, "type":"Point", "coordinates":[ -94.22184, 47.24747 ] }, "properties":{ "provider":"MVP", "code":"MissHW_Leech", "slug":"misshw_leech", "elevation":1200.0, "horizontal_datum":"NAD83", "vertical_datum":"NGVD29", "state":"MN", "kind":"PROJECT", "nearest_city":"Federal Dam", "public_name":"Leech Lake Dam", "location_code":3879016, "nsid":null, "aliases":{ "NIDID":"MN00585", "CWMS Legacy Naming":"MissHW_Leech", "CWMS Standard Naming":"MissHW_Leech", "NWS Handbook 5 ID":"FEDM5" }, "timeseries":[ { "tsid":"MissHW_Leech.Flow-In.Inst.~15Minutes.0.best", "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":1005.3, "delta24h":null, "sort_order":6, "results":null }, { "tsid":"MissHW_Leech.Flow-Out.Inst.~15Minutes.0.best", "label":"Outflow", "base_parameter":"Flow", "parameter":"Flow-Out", "unit":"cfs", "unit_long_name":"Cubic feet per second", "latest_time":"2026-04-14T22:00:00Z", "latest_value":115.52, "delta24h":null, "sort_order":7, "results":null }, { "tsid":"MissHW_Leech-Lake.Elev.Inst.~15Minutes.0.best-NGVD29", "label":"Elevation", "base_parameter":"Elev", "parameter":"Elev", "unit":"ft", "unit_long_name":"Feet", "latest_time":"2026-04-14T22:30:00Z", "latest_value":1294.45, "delta24h":null, "sort_order":1, "results":null }, { "tsid":"MissHW_Leech.Stor.Ave.6Hours.6Hours.comp", "label":"Flood Storage", "base_parameter":"Stor", "parameter":"Stor", "unit":"ac-ft", "unit_long_name":"Acre-feet", "latest_time":"2026-04-14T18:00:00Z", "latest_value":551639.62, "delta24h":null, "sort_order":11, "results":null }, { "tsid":"MissHW_Leech-Tailwater.Elev.Inst.~15Minutes.0.best-NGVD29", "label":"Elevation Tailwater", "base_parameter":"Elev", "parameter":"Elev", "unit":"ft", "unit_long_name":"Feet", "latest_time":"2026-04-14T22:00:00Z", "latest_value":1284.85, "delta24h":null, "sort_order":3, "results":null } ], "name":"Leech Lake Dam", "hasResopsAverages":"true", "nidId":"MN00585", "nidid":"", "levels":[ { "slug":"elev.bottom of flood control", "label":"Bottom of Flood Control", "parameter":"Elev", "base_parameter":"Elev", "tsid":"MissHW_Leech.Elev.Inst.0.Bottom of Flood Control", "latest_value":1294.7, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.bottom of normal", "label":"Bottom of Normal", "parameter":"Elev", "base_parameter":"Elev", "tsid":"MissHW_Leech.Elev.Inst.0.Bottom of Normal", "latest_value":1294.5, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.regulating", "label":"Regulating", "parameter":"Elev", "base_parameter":"Elev", "tsid":"MissHW_Leech.Elev.Inst.0.Regulating", "latest_value":1294.38, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.streambed", "label":"Streambed", "parameter":"Elev", "base_parameter":"Elev", "tsid":"MissHW_Leech.Elev.Inst.0.Streambed", "latest_value":1288.49, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of dam", "label":"Top of Dam", "parameter":"Elev", "base_parameter":"Elev", "tsid":"MissHW_Leech.Elev.Inst.0.Top of Dam", "latest_value":1299.54, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of flood", "label":"Top of Flood", "parameter":"Elev", "base_parameter":"Elev", "tsid":"MissHW_Leech.Elev.Inst.0.Top of Flood", "latest_value":1297.94, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of normal", "label":"Top of Normal", "parameter":"Elev", "base_parameter":"Elev", "tsid":"MissHW_Leech.Elev.Inst.0.Top of Normal", "latest_value":1294.9, "units":"ft", "units_long_name":"Feet" }, { "slug":"stor.bottom of normal", "label":"Bottom of Normal", "parameter":"Stor", "base_parameter":"Stor", "tsid":"MissHW_Leech.Stor.Inst.0.Bottom of Normal", "latest_value":558430, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.streambed", "label":"Streambed", "parameter":"Stor", "base_parameter":"Stor", "tsid":"MissHW_Leech.Stor.Inst.0.Streambed", "latest_value":0, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of dam", "label":"Top of Dam", "parameter":"Stor", "base_parameter":"Stor", "tsid":"MissHW_Leech.Stor.Inst.0.Top of Dam", "latest_value":1233300, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of flood", "label":"Top of Flood", "parameter":"Stor", "base_parameter":"Stor", "tsid":"MissHW_Leech.Stor.Inst.0.Top of Flood", "latest_value":1043344, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of normal", "label":"Top of Normal", "parameter":"Stor", "base_parameter":"Stor", "tsid":"MissHW_Leech.Stor.Inst.0.Top of Normal", "latest_value":610255, "units":"ac-ft", "units_long_name":"Acre-feet" } ], "id":550268, "associatedStructuresCount":0, "conditionAssessDate":null, "conditionAssessDetail":null, "conditionAssessId":6, "damHeight":13, "damLength":3314, "distance":1, "drainageArea":1163, "eapId":1, "dsacAssignedDate":"2010-03-30T12:00:00.000Z", "eapMeetsGuidelinesId":0, "emergencyContactsUpdated":"2024-11-14T12:00:00.000Z", "eapLastRevDate":null, "enforcementAuthorityId":0, "federalId":"MN00585", "oldFederalId":"MN00585", "hazardId":3, "hydraulicHeight":11, "inspectionAuthorityId":0, "inspectionDate":"2021-05-20T12:00:00.000Z", "inspectionFrequency":5, "jurisdictionAuthorityId":0, "latitude":47.2477998350001, "lengthOfLocks":0, "secondaryLengthOfLocks":null, "longitude":-94.221691242, "maxDischarge":1500, "maxStorage":680000, "nidHeight":13, "nidStorage":680000, "normalStorage":490000, "numberOfLocks":0, "operationalStatusDate":"2010-03-30T12:00:00.000Z", "operationalStatusId":2, "originalDesignerName":null, "otherStructureId":null, "permittingAuthorityId":0, "politicalPartyId":null, "privateDamId":null, "projectDescription":"The U.S. Army Corps of Engineers (USACE) constructed Leech as a timber dam and began operations in 1885; and reconstructed it as a more permanent concrete structure in 1903. Leech (located in Federal Dam, Minnesota) is one of six headwaters\u2019 dams on the Mississippi River. The headwaters dams were constructed to supplement river flows for navigation purposes by filling the lakes in the spring and drafting them down as needed during the summer; but the headwaters dams have rarely been used for that purpose since the water control plans were revised in 1945. The downstream lock & dam system constructed in the 1930\u2019s nearly eliminated the need for upstream water storage, so the dam is primarily operated to optimize recreation and environmental benefits. The control structure has 21 bays (6 feet wide) controlled by stoplogs, 1 log sluice bay (12 feet wide) with stoplogs, and 5 bays fitted with slide gates. The control structure is founded on timber piles. An earth embankment extends about 3300 feet north of the control structure. The dam has been extensively modified numerous times in its history, including removal of 13 spillway bays due to complications during a 1957 rehabilitation contract. The dam served as a highway bridge until the late 1960\u2019s when the County State Aid Highway No. 8 bridge was constructed just downstream of the dam.", "riskCharSummary":"USACE currently has Leech listed as a moderate-risk dam (DSAC-3) among its more than 700 dams, but this is expected to be revised to low-risk (DSAC 4) following approval of a draft risk assessment conducted in 2021. The risk ranking is based on a screening-level assessment in 2009 that cited concerns for overtopping and decaying timber stoplogs. A risk assessment in 2021 recommends reducing the risk ranking based on a lack of plausible failure modes. Hydrologic adequacy studies show the dam can withstand floods exceeding the plausible maximum flood that is a design standard for high hazard dams. Even with clogging of the spillway, the large lake size can contain extreme floods. The potential consequences of a breach in Leech are primarily economic or environmental. Dam breach modeling shows no direct loss of life, so Leech is listed as a significant hazard dam.", "riskManagementMeasures":"USACE is continuously taking steps to reduce the risk to the public. USACE manages dam-related flood risks by continually monitoring the condition and health of the dam and prioritizing activities that will most impact these risks. Regular maintenance and repairs are performed as needed to keep the dam functioning properly. Funding has been requested to evaluate fish passage at Leech. Fish passage alternatives may consider potential modifications to the dam, but such alternations do not directly stem from dam safety concerns.", "riverName":"LEECH RIVER", "separateStructuresCount":0, "sourceAgency":"US Army Corps of Engineers", "spillwayTypeId":1, "spillwayWidth":152, "stateFedId":"MN00585", "stateRegulatoryAgency":null, "stateRegulatedId":0, "structuralHeight":13, "submitDate":"2023-02-16T17:25:36.119Z", "surfaceArea":117500, "volume":0, "widthOfLocks":0, "secondaryWidthOfLocks":null, "yearCompleted":1885, "congDist":"Congressional District 08, Minnesota", "city":"FEDERAL DAM", "county":"Cass", "aiannh":"Leech Lake Reservation", "websiteUrl":"https://www.usace.army.mil/Missions/Civil-Works/Dam-Safety-Program/Article/2870967/dam-safety-program/", "coreTypeIds":"3", "damTypeIds":"11;8", "fedConstructionIds":"1", "fedDesignIds":"1", "fedFundingIds":"1", "fedInspectionIds":"1", "fedOperationIds":"1", "fedOtherIds":"1", "fedOwnerIds":"1", "fedRegulatoryIds":"1", "formerNames":null, "foundationTypeIds":"3", "nonFederalDamOnFederalId":0, "designerNames":"CEMVP", "otherNames":"Leech Lake", "ownerNames":"USACE - St. Paul District", "ownerTypeIds":"3", "primaryDamTypeId":11, "primaryOwnerTypeId":3, "primaryPurposeId":5, "purposeIds":"5;12;3;4;8;9", "dsacId":3, "femaRegion":"5", "lastEapExcerDate":"2022-03-15T12:00:00.000Z", "dataUpdated":"2024-11-14T12:00:00.000Z", "usaceDistrict":"St. Paul District", "noConsequencesId":0, "secretaryAgricultureBuiltId":null, "nrcsWatershedAuthorizationId":null, "isAssociatedStructureId":"No", "fedRegulatedId":"Yes", "inundationNidAddedId":1, "damStatusId":2, "huc06":"070101", "doi_region":null, "doi_region_name":"Great Lakes", "doi_region_number":3, "thirtyYearAverage":0.2854, "tenthPercentile":0.2548, "ninetiethPercentile":0.3222 }, "id":3879016, "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/3879016?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/3879016?f=jsonld" }, { "rel":"alternate", "type":"text/html", "title":"This document as HTML", "href":"https://api.wwdh.internetofwater.app/collections/usace-edr/items/3879016?f=html" }, { "rel":"collection", "type":"application/json", "title":"USACE Access2Water API", "href":"https://api.wwdh.internetofwater.app/collections/usace-edr" } ] }