{ "bbox":null, "type":"Feature", "geometry":{ "bbox":null, "type":"Point", "coordinates":[ -82.1519, 40.7242 ] }, "properties":{ "provider":"LRH", "code":"Mohicanville", "slug":"mohicanville", "elevation":null, "horizontal_datum":"WGS84", "vertical_datum":"", "state":"OH", "kind":"PROJECT", "nearest_city":"Mohicanville", "public_name":"Mohicanville Dam", "location_code":557108, "nsid":null, "aliases":{ "Local Loc ID":"MOL", "NIDID":"OH00019" }, "timeseries":[ { "tsid":"Mohicanville-Lake.Flow.Inst.15Minutes.0.OBS", "label":"Inflow", "base_parameter":"Flow", "parameter":"Flow", "unit":"cfs", "unit_long_name":"Cubic feet per second", "latest_time":"2026-04-14T22:15:00Z", "latest_value":468.15, "delta24h":null, "sort_order":6, "results":null }, { "tsid":"Mohicanville-Lake.Elev.Inst.15Minutes.0.OBS", "label":"Elevation", "base_parameter":"Elev", "parameter":"Elev", "unit":"ft", "unit_long_name":"Feet", "latest_time":"2026-04-14T22:15:00Z", "latest_value":950.54, "delta24h":null, "sort_order":1, "results":null }, { "tsid":"Mohicanville-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":932.0, "delta24h":null, "sort_order":2, "results":null }, { "tsid":"Mohicanville-Lake.Stor.Inst.15Minutes.0.OBS", "label":"Flood Storage", "base_parameter":"Stor", "parameter":"Stor", "unit":"ac-ft", "unit_long_name":"Acre-feet", "latest_time":"2026-04-14T22:15:00Z", "latest_value":14297.18, "delta24h":null, "sort_order":11, "results":null }, { "tsid":"Mohicanville-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":9.45, "delta24h":null, "sort_order":5, "results":null }, { "tsid":"Mohicanville-Lake.Stor.Inst.15Minutes.0.OBS", "label":"Conservation Storage", "base_parameter":"Stor", "parameter":"Stor", "unit":"ac-ft", "unit_long_name":"Acre-feet", "latest_time":"2026-04-14T22:15:00Z", "latest_value":14297.18, "delta24h":null, "sort_order":13, "results":null }, { "tsid":"Mohicanville-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":1576.71, "delta24h":null, "sort_order":7, "results":null }, { "tsid":"Mohicanville-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":939.45, "delta24h":null, "sort_order":3, "results":null } ], "name":"Mohicanville Dam", "hasResopsAverages":"false", "nidId":"OH00019", "nidid":"", "levels":[ { "slug":"elev.bottom of flood", "label":"Bottom of Flood", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Mohicanville.Elev.Inst.0.Bottom of Flood", "latest_value":932, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.streambed", "label":"Streambed", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Mohicanville.Elev.Inst.0.Streambed", "latest_value":930.01, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of dam", "label":"Top of Dam", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Mohicanville.Elev.Inst.0.Top of Dam", "latest_value":981.7, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of flood", "label":"Top of Flood", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Mohicanville.Elev.Inst.0.Top of Flood", "latest_value":963, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of flood threat", "label":"Top of Flood Threat", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Mohicanville.Elev.Inst.0.Top of Flood Threat", "latest_value":950, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of inactive", "label":"Top of Inactive", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Mohicanville.Elev.Inst.0.Top of Inactive", "latest_value":932, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of normal", "label":"Top of Normal", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Mohicanville.Elev.Inst.0.Top of Normal", "latest_value":932, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of record", "label":"Top of Record", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Mohicanville.Elev.Inst.0.Top of Record", "latest_value":962.35, "units":"ft", "units_long_name":"Feet" }, { "slug":"stor.bottom of flood", "label":"Bottom of Flood", "parameter":"Stor", "base_parameter":"Stor", "tsid":"Mohicanville.Stor.Inst.0.Bottom of Flood", "latest_value":18, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.bottom of normal", "label":"Bottom of Normal", "parameter":"Stor", "base_parameter":"Stor", "tsid":"Mohicanville.Stor.Inst.0.Bottom of Normal", "latest_value":18, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of dam", "label":"Top of Dam", "parameter":"Stor", "base_parameter":"Stor", "tsid":"Mohicanville.Stor.Inst.0.Top of Dam", "latest_value":325635, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of flood", "label":"Top of Flood", "parameter":"Stor", "base_parameter":"Stor", "tsid":"Mohicanville.Stor.Inst.0.Top of Flood", "latest_value":95100, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of inactive", "label":"Top of Inactive", "parameter":"Stor", "base_parameter":"Stor", "tsid":"Mohicanville.Stor.Inst.0.Top of Inactive", "latest_value":18, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of normal", "label":"Top of Normal", "parameter":"Stor", "base_parameter":"Stor", "tsid":"Mohicanville.Stor.Inst.0.Top of Normal", "latest_value":18, "units":"ac-ft", "units_long_name":"Acre-feet" } ], "id":550215, "associatedStructuresCount":2, "conditionAssessDate":null, "conditionAssessDetail":null, "conditionAssessId":6, "damHeight":null, "damLength":1220, "distance":20, "drainageArea":271, "eapId":1, "dsacAssignedDate":"2018-11-26T12:00:00.000Z", "eapMeetsGuidelinesId":1, "emergencyContactsUpdated":"2024-08-15T12:00:00.000Z", "eapLastRevDate":"2024-08-05T12:00:00.000Z", "enforcementAuthorityId":0, "federalId":"OH00019", "oldFederalId":"OH00019", "hazardId":4, "hydraulicHeight":36, "inspectionAuthorityId":0, "inspectionDate":"2022-07-15T12:00:00.000Z", "inspectionFrequency":5, "jurisdictionAuthorityId":0, "latitude":40.7256983520001, "lengthOfLocks":0, "secondaryLengthOfLocks":null, "longitude":-82.153886252, "maxDischarge":20500, "maxStorage":102000, "nidHeight":46, "nidStorage":102000, "normalStorage":0, "numberOfLocks":0, "operationalStatusDate":"2018-11-26T12:00:00.000Z", "operationalStatusId":1, "originalDesignerName":null, "otherStructureId":null, "permittingAuthorityId":0, "politicalPartyId":null, "privateDamId":null, "projectDescription":"The U.S. Army Corps of Engineers completed the construction of Mohicanville Dam in 1936. The Flood Control Act of 1939 turned over ownership, as well as operations and maintenance, of the Muskingum Basin projects to the USACE. This transition resulted in a partnership between the USACE and the MWCD wherein the USACE owns the dams and immediate land footprints, while the MWCD owns the land beneath the reservoir, stored waters and surrounding lands.\n\nMohicanville Dam is a high hazard dam located in Ashland County, Ohio, on Lake Fork of the Mohican River, approximately 11.9 miles above the mouth of Lake Fork and 171.2 miles upstream of the confluence of the Muskingum and Ohio Rivers. Most dams that the U.S. Army Corps of Engineers manages, if breached, would lead to loss of life and/or high economic impacts downstream causing them to be labeled \u201chigh hazard\u201d. The lake is a conservation pool for flood control, recreation, fish, and wildlife, and for water conservation.\nThe earthen dam has a length of 1,220 feet and a height of 46 feet and controls a drainage area of 271 square miles. The spillway is located at the left abutment and is an unregulated concrete overflow section consisting of a weir that flows onto concrete paced terraces into the outlet channel. Operation of the spillway during extreme flood events could be necessary to prevent the dam from overtopping. Between 1937 and 2022, the entire Muskingum River Lake projects had prevented a total of 7.8 billion in flood damages, over $92 million of flood damages per year.", "riskCharSummary":"Mohicanville Dam and its associated dikes significantly reduce the risk of flooding to surrounding communities; however, it does not entirely eliminate the risk. Although Mohicanville 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 Mohicanville Dam and the associated Dikes in 2017 and classified the risk of failure for the dam and dikes 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 27,260 cubic feet of water per second. The operation of the spillway would be necessary to prevent the dam from overtopping and potentially breaching. \nMohicanville Dam discharges are handled by Mohawk Dam based on the downstream control for Mohawk Dam. While the Mohicanville Dam spillway has never flowed, if operated it could result in significant flooding in downstream communities along the river corridors between Mohicanville Dam and Mohawk Dam 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. \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 Mohicanville 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 Mohicanville 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":"LAKE FORK OF MOHICAN RIVER", "separateStructuresCount":2, "sourceAgency":"US Army Corps of Engineers", "spillwayTypeId":3, "spillwayWidth":90, "stateFedId":"OH00019", "stateRegulatoryAgency":null, "stateRegulatedId":0, "structuralHeight":46, "submitDate":"2023-05-01T19:03:02.202Z", "surfaceArea":0, "volume":310946, "widthOfLocks":0, "secondaryWidthOfLocks":null, "yearCompleted":1937, "congDist":"Congressional District 04, Ohio", "city":"MOHICANVILLE", "county":"Ashland", "aiannh":null, "websiteUrl":"https://www.lrh.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":"3", "nonFederalDamOnFederalId":0, "designerNames":"CELRH", "otherNames":"None-Dry Dam", "ownerNames":"USACE - Huntington District", "ownerTypeIds":"3", "primaryDamTypeId":8, "primaryOwnerTypeId":3, "primaryPurposeId":9, "purposeIds":"9", "dsacId":4, "femaRegion":"5", "lastEapExcerDate":"2024-08-15T12:00:00.000Z", "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":557108, "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/557108?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/557108?f=jsonld" }, { "rel":"alternate", "type":"text/html", "title":"This document as HTML", "href":"https://api.wwdh.internetofwater.app/collections/usace-edr/items/557108?f=html" }, { "rel":"collection", "type":"application/json", "title":"USACE Access2Water API", "href":"https://api.wwdh.internetofwater.app/collections/usace-edr" } ] }