{ "bbox":null, "type":"Feature", "geometry":{ "bbox":null, "type":"Point", "coordinates":[ -82.0878, 40.3525 ] }, "properties":{ "provider":"LRH", "code":"Mohawk", "slug":"mohawk", "elevation":799.2, "horizontal_datum":"WGS84", "vertical_datum":"NGVD29", "state":"OH", "kind":"PROJECT", "nearest_city":"Nellie", "public_name":"Mohawk Dam", "location_code":552108, "nsid":null, "aliases":{ "Local Loc ID":"MKW", "NIDID":"OH00016" }, "timeseries":[ { "tsid":"Mohawk-Lake.Elev.Inst.1Day.0.RUL", "label":"Elevation Rule Curve", "base_parameter":"Elev", "parameter":"Elev", "unit":"ft", "unit_long_name":"Feet", "latest_time":"2026-04-14T17:00:00Z", "latest_value":799.2, "delta24h":null, "sort_order":2, "results":null }, { "tsid":"Mohawk-Outflow.Precip.Total.15Minutes.15Minutes.OBS", "label":"Precipitation", "base_parameter":"Precip", "parameter":"Precip", "unit":"in", "unit_long_name":"Inches", "latest_time":"2026-04-14T22:15:00Z", "latest_value":0.0, "delta24h":null, "sort_order":16, "results":null }, { "tsid":"Mohawk-Outflow.Stage.Inst.15Minutes.0.OBS", "label":"Stage Tailwater", "base_parameter":"Stage", "parameter":"Stage", "unit":"ft", "unit_long_name":"Feet", "latest_time":"2026-04-14T22:15:00Z", "latest_value":9.81, "delta24h":null, "sort_order":5, "results":null }, { "tsid":"Mohawk-Lake.Stor.Inst.15Minutes.0.OBS", "label":"Flood Storage", "base_parameter":"Stor", "parameter":"Stor", "unit":"ac-ft", "unit_long_name":"Acre-feet", "latest_time":"2026-04-14T22:30:00Z", "latest_value":2964.4, "delta24h":null, "sort_order":11, "results":null }, { "tsid":"Mohawk-Lake.Elev.Inst.15Minutes.0.OBS", "label":"Elevation", "base_parameter":"Elev", "parameter":"Elev", "unit":"ft", "unit_long_name":"Feet", "latest_time":"2026-04-14T22:30:00Z", "latest_value":816.03, "delta24h":null, "sort_order":1, "results":null }, { "tsid":"Mohawk-Outflow.Elev.Inst.15Minutes.0.OBS", "label":"Elevation Tailwater", "base_parameter":"Elev", "parameter":"Elev", "unit":"ft", "unit_long_name":"Feet", "latest_time":"2026-04-14T22:15:00Z", "latest_value":799.81, "delta24h":null, "sort_order":3, "results":null }, { "tsid":"Mohawk-Outflow.Flow.Inst.15Minutes.0.OBS", "label":"Outflow", "base_parameter":"Flow", "parameter":"Flow", "unit":"cfs", "unit_long_name":"Cubic feet per second", "latest_time":"2026-04-14T22:15:00Z", "latest_value":4955.02, "delta24h":null, "sort_order":7, "results":null }, { "tsid":"Mohawk-Lake.Flow.Inst.15Minutes.0.OBS", "label":"Inflow", "base_parameter":"Flow", "parameter":"Flow", "unit":"cfs", "unit_long_name":"Cubic feet per second", "latest_time":"2026-04-14T22:30:00Z", "latest_value":5075.59, "delta24h":null, "sort_order":6, "results":null }, { "tsid":"Mohawk-Lake.Stor.Inst.15Minutes.0.OBS", "label":"Conservation Storage", "base_parameter":"Stor", "parameter":"Stor", "unit":"ac-ft", "unit_long_name":"Acre-feet", "latest_time":"2026-04-14T22:30:00Z", "latest_value":2964.4, "delta24h":null, "sort_order":13, "results":null } ], "name":"Mohawk Dam", "hasResopsAverages":"false", "nidId":"OH00016", "nidid":"", "levels":[ { "slug":"elev.bottom of flood", "label":"Bottom of Flood", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Mohawk.Elev.Inst.0.Bottom of Flood", "latest_value":799.2, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.streambed", "label":"Streambed", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Mohawk.Elev.Inst.0.Streambed", "latest_value":795.01, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of dam", "label":"Top of Dam", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Mohawk.Elev.Inst.0.Top of Dam", "latest_value":910, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of flood", "label":"Top of Flood", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Mohawk.Elev.Inst.0.Top of Flood", "latest_value":890, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of flood threat", "label":"Top of Flood Threat", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Mohawk.Elev.Inst.0.Top of Flood Threat", "latest_value":855, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of inactive", "label":"Top of Inactive", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Mohawk.Elev.Inst.0.Top of Inactive", "latest_value":799.2, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of normal", "label":"Top of Normal", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Mohawk.Elev.Inst.0.Top of Normal", "latest_value":799.2, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of record", "label":"Top of Record", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Mohawk.Elev.Inst.0.Top of Record", "latest_value":880.2, "units":"ft", "units_long_name":"Feet" }, { "slug":"stor.bottom of normal", "label":"Bottom of Normal", "parameter":"Stor", "base_parameter":"Stor", "tsid":"Mohawk.Stor.Inst.0.Bottom of Normal", "latest_value":100, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of dam", "label":"Top of Dam", "parameter":"Stor", "base_parameter":"Stor", "tsid":"Mohawk.Stor.Inst.0.Top of Dam", "latest_value":480578.9, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of flood", "label":"Top of Flood", "parameter":"Stor", "base_parameter":"Stor", "tsid":"Mohawk.Stor.Inst.0.Top of Flood", "latest_value":285000, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of inactive", "label":"Top of Inactive", "parameter":"Stor", "base_parameter":"Stor", "tsid":"Mohawk.Stor.Inst.0.Top of Inactive", "latest_value":100, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of normal", "label":"Top of Normal", "parameter":"Stor", "base_parameter":"Stor", "tsid":"Mohawk.Stor.Inst.0.Top of Normal", "latest_value":100, "units":"ac-ft", "units_long_name":"Acre-feet" } ], "id":550211, "associatedStructuresCount":0, "conditionAssessDate":null, "conditionAssessDetail":null, "conditionAssessId":6, "damHeight":null, "damLength":2330, "distance":6, "drainageArea":1504, "eapId":1, "dsacAssignedDate":"2023-03-31T12:00:00.000Z", "eapMeetsGuidelinesId":1, "emergencyContactsUpdated":"2024-07-25T12:00:00.000Z", "eapLastRevDate":"2011-07-29T12:00:00.000Z", "enforcementAuthorityId":0, "federalId":"OH00016", "oldFederalId":"OH00016", "hazardId":4, "hydraulicHeight":105, "inspectionAuthorityId":0, "inspectionDate":"2020-09-04T12:00:00.000Z", "inspectionFrequency":5, "jurisdictionAuthorityId":0, "latitude":40.3516237320001, "lengthOfLocks":0, "secondaryLengthOfLocks":null, "longitude":-82.088864297, "maxDischarge":151000, "maxStorage":285000, "nidHeight":111, "nidStorage":285000, "normalStorage":0, "numberOfLocks":0, "operationalStatusDate":"2023-03-31T12:00:00.000Z", "operationalStatusId":1, "originalDesignerName":null, "otherStructureId":null, "permittingAuthorityId":0, "politicalPartyId":null, "privateDamId":null, "projectDescription":"Mohawk Dam is one component of a system of flood risk management (FRM) projects located in the Muskingum River Basin in Ohio and was authorized and constructed through a cooperative agreement with the Muskingum Watershed Conservancy District (MWCD). The Flood Control Act of 1939 turned over ownership, as well as operations and maintenance, of the Muskingum Basin projects to the U.S. Army Corps of Engineers (USACE). This transition resulted in a partnership between USACE and the MWCD wherein USACE owns the dams and immediate land footprint of the dam, while the MWCD owns the land beneath the reservoir, stored waters, and surrounding lands. The Dam is located on the Walhonding River, 17.4 miles above the mouth of the Walhonding River and 129.8 miles above the mouth of the Muskingum River. Mohawk Dam also controls the outflow from four other USACE flood control dams located in the Mohawk drainage basin. The projects include Mohicanville Dam, Charles Mill Lake, Pleasant Hill Lake, and North Branch of Kokosing Lake. The floodplain between Mohawk Dam and downstream at-risk population centers is a gentle sloping valley. Development is relatively sparse comprised of small to moderate communities, several industrial sites, and farmland.", "riskCharSummary":"Mohawk Dam significantly reduce the risk of flooding to surrounding communities; however, it does not entirely eliminate the risk. Although Mohawk Dam have historically performed well, extreme rain events may cause areas downstream to be flooded. Even when the dam and levee operate as intended, downstream flooding could still occur in a very large rainfall event. This event could require unusually large quantities of water to be released through the dam gates and emergency spillways. In extreme cases, this flooding could be similar to what was experienced prior to the project\u2019s construction. \n\nThe U.S. Army Corps of Engineers completed a risk assessment for Mohawk Dam in 2017 and classified the risk of failure for Mohawk Dam as low. The risk categorization is based on the risk of rare storm events occurring which would cause more rainfall than the dam can store safely. During such an event, the spillways have the potential to pass over 151,000 cubic feet of water per second. The operation of the spillway would be necessary to prevent the dam from overtopping and potentially breaching. \n\nWhile the Mohawk Dam spillway has never flowed, if operated it could result in significant flooding in downstream communities from Coshocton, OH to the confluence of the Muskingum and Ohio Rivers. Depending on the amount of water released, significant damages to houses, buildings, factories, roads, bridges, power, gas, and water supply may occur. Critical infrastructure, including roadways (evacuation routes) and bridges along the Scioto River, may not be passable due to high flood waters during spillway flows. \n\nWhile rare events like these have not occurred to date, if they were to happen, water is likely to reach high elevations quickly and be more than tens of feet deep depending on the location. In the rare event Mohawk Dam must pass these extreme flows, follow all directions from emergency officials, including evacuation orders. Failure to do so puts you and your family\u2019s lives at risk.", "riskManagementMeasures":"There are numerous activities that U.S. Army Corps of Engineers conducts on a day-to-day basis to help manage risk at Mohawk Dam. The project is well maintained through continuous operations and maintenance activities, and the U.S. Army Corps of Engineers conducts detailed inspections of the dam, levee, and dikes during both normal lake levels and during flood events. Supplementing these inspections, the dam has a specialized instrumentation and monitoring system to allow staff to continually evaluate the dam for changing conditions. Risk management and emergency response actions are being supported by conducting tabletop exercises and dam safety training with the U.S. Army Corps of Engineers staff and local and state emergency responders. Additionally, the dam\u2019s Emergency Action Plan is routinely updated to improve emergency response actions.", "riverName":"WALHONDING RIVER", "separateStructuresCount":0, "sourceAgency":"US Army Corps of Engineers", "spillwayTypeId":3, "spillwayWidth":620, "stateFedId":"OH00016", "stateRegulatoryAgency":null, "stateRegulatedId":0, "structuralHeight":111, "submitDate":"2023-02-16T17:25:37.184Z", "surfaceArea":0, "volume":2053400, "widthOfLocks":0, "secondaryWidthOfLocks":null, "yearCompleted":1937, "congDist":"Congressional District 12, Ohio", "city":"WARSAW", "county":"Coshocton", "aiannh":null, "websiteUrl":"https://www.lrh.usace.army.mil/Missions/Civil-Works/Dam-Safety-Program/", "coreTypeIds":"3", "damTypeIds":"5;8", "fedConstructionIds":"1", "fedDesignIds":"1", "fedFundingIds":"1", "fedInspectionIds":"1", "fedOperationIds":"1", "fedOtherIds":"1", "fedOwnerIds":"1", "fedRegulatoryIds":"1", "formerNames":null, "foundationTypeIds":"3", "nonFederalDamOnFederalId":0, "designerNames":"CELRH", "otherNames":"None - Dry Dam", "ownerNames":"USACE - Huntington District", "ownerTypeIds":"3", "primaryDamTypeId":5, "primaryOwnerTypeId":3, "primaryPurposeId":9, "purposeIds":"9", "dsacId":4, "femaRegion":"5", "lastEapExcerDate":"2024-07-25T12:00:00.000Z", "dataUpdated":"2025-06-27T12:00:00.000Z", "usaceDistrict":"Huntington District", "noConsequencesId":0, "secretaryAgricultureBuiltId":null, "nrcsWatershedAuthorizationId":null, "isAssociatedStructureId":"No", "fedRegulatedId":"Yes", "inundationNidAddedId":1, "damStatusId":2, "huc06":"050400", "doi_region":null, "doi_region_name":"Great Lakes", "doi_region_number":3 }, "id":552108, "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/552108?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/552108?f=jsonld" }, { "rel":"alternate", "type":"text/html", "title":"This document as HTML", "href":"https://api.wwdh.internetofwater.app/collections/usace-edr/items/552108?f=html" }, { "rel":"collection", "type":"application/json", "title":"USACE Access2Water API", "href":"https://api.wwdh.internetofwater.app/collections/usace-edr" } ] }