{ "bbox":null, "type":"Feature", "geometry":{ "bbox":null, "type":"Point", "coordinates":[ -82.0817, 39.9917 ] }, "properties":{ "provider":"LRH", "code":"Dillon", "slug":"dillon", "elevation":700.0, "horizontal_datum":"WGS84", "vertical_datum":"NGVD29", "state":"OH", "kind":"PROJECT", "nearest_city":"Zanesville", "public_name":"Dillon Lake", "location_code":537108, "nsid":null, "aliases":{ "Local Loc ID":"DIL", "NIDID":"OH00007" }, "timeseries":[ { "tsid":"Dillon-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":11356.18, "delta24h":null, "sort_order":11, "results":null }, { "tsid":"Dillon-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":300.29, "delta24h":null, "sort_order":7, "results":null }, { "tsid":"Dillon-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":11356.18, "delta24h":null, "sort_order":13, "results":null }, { "tsid":"Dillon-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":737.0, "delta24h":null, "sort_order":2, "results":null }, { "tsid":"Dillon-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":"Dillon-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":704.29, "delta24h":null, "sort_order":3, "results":null }, { "tsid":"Dillon-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":737.6, "delta24h":null, "sort_order":1, "results":null }, { "tsid":"Dillon-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":4.29, "delta24h":null, "sort_order":5, "results":null }, { "tsid":"Dillon-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":446.46, "delta24h":null, "sort_order":6, "results":null } ], "name":"Dillon Lake", "hasResopsAverages":"true", "nidId":"OH00007", "nidid":"", "levels":[ { "slug":"elev.bottom of flood", "label":"Bottom of Flood", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Dillon.Elev.Inst.0.Bottom of Flood", "latest_value":737, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.streambed", "label":"Streambed", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Dillon.Elev.Inst.0.Streambed", "latest_value":701, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of conservation", "label":"Top of Conservation", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Dillon.Elev.Inst.0.Top of Conservation", "latest_value":733.7, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of dam", "label":"Top of Dam", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Dillon.Elev.Inst.0.Top of Dam", "latest_value":818, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of flood", "label":"Top of Flood", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Dillon.Elev.Inst.0.Top of Flood", "latest_value":790, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of flood threat", "label":"Top of Flood Threat", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Dillon.Elev.Inst.0.Top of Flood Threat", "latest_value":763, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of inactive", "label":"Top of Inactive", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Dillon.Elev.Inst.0.Top of Inactive", "latest_value":704, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of normal", "label":"Top of Normal", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Dillon.Elev.Inst.0.Top of Normal", "latest_value":736.94, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of record", "label":"Top of Record", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Dillon.Elev.Inst.0.Top of Record", "latest_value":788.23, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of recreation", "label":"Top of Recreation", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Dillon.Elev.Inst.0.Top of Recreation", "latest_value":737, "units":"ft", "units_long_name":"Feet" }, { "slug":"stor.bottom of flood", "label":"Bottom of Flood", "parameter":"Stor", "base_parameter":"Stor", "tsid":"Dillon.Stor.Inst.0.Bottom of Flood", "latest_value":10271.2, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of conservation", "label":"Top of Conservation", "parameter":"Stor", "base_parameter":"Stor", "tsid":"Dillon.Stor.Inst.0.Top of Conservation", "latest_value":17490, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of dam", "label":"Top of Dam", "parameter":"Stor", "base_parameter":"Stor", "tsid":"Dillon.Stor.Inst.0.Top of Dam", "latest_value":666670, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of flood", "label":"Top of Flood", "parameter":"Stor", "base_parameter":"Stor", "tsid":"Dillon.Stor.Inst.0.Top of Flood", "latest_value":267000, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of inactive", "label":"Top of Inactive", "parameter":"Stor", "base_parameter":"Stor", "tsid":"Dillon.Stor.Inst.0.Top of Inactive", "latest_value":30, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of normal", "label":"Top of Normal", "parameter":"Stor", "base_parameter":"Stor", "tsid":"Dillon.Stor.Inst.0.Top of Normal", "latest_value":10242.21, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of recreation", "label":"Top of Recreation", "parameter":"Stor", "base_parameter":"Stor", "tsid":"Dillon.Stor.Inst.0.Top of Recreation", "latest_value":10300, "units":"ac-ft", "units_long_name":"Acre-feet" } ], "id":550240, "associatedStructuresCount":2, "conditionAssessDate":null, "conditionAssessDetail":null, "conditionAssessId":6, "damHeight":null, "damLength":1400, "distance":3, "drainageArea":742, "eapId":1, "dsacAssignedDate":"2017-05-27T12:00:00.000Z", "eapMeetsGuidelinesId":1, "emergencyContactsUpdated":"2024-07-15T12:00:00.000Z", "eapLastRevDate":"2011-06-16T12:00:00.000Z", "enforcementAuthorityId":0, "federalId":"OH00007", "oldFederalId":"OH00007", "hazardId":4, "hydraulicHeight":90, "inspectionAuthorityId":0, "inspectionDate":"2024-09-18T12:00:00.000Z", "inspectionFrequency":5, "jurisdictionAuthorityId":0, "latitude":39.9922156920001, "lengthOfLocks":0, "secondaryLengthOfLocks":null, "longitude":-82.0799371379999, "maxDischarge":89700, "maxStorage":274000, "nidHeight":118, "nidStorage":274000, "normalStorage":17500, "numberOfLocks":0, "operationalStatusDate":"2017-05-27T12:00:00.000Z", "operationalStatusId":1, "originalDesignerName":null, "otherStructureId":null, "permittingAuthorityId":0, "politicalPartyId":null, "privateDamId":null, "projectDescription":"The US Army Corps of Engineers completed the construction of Dillon Dam in 1960. The project was authorized by the Flood Control Act of 1938 (Public Law 761, 75th Congress, 3rd Session: H.R. 10618) The authorized project purposes include flood risk management, recreation, fish and wildlife enhancement and low-flow augmentation. The total cost to build the dam was almost $30 Million. It has prevented over $1.5 Billion in flood damages since construction. \n\nDillon Dam is a high hazard dam located in Muskingum County, Ohio, north of Zanesville, Ohio. The Dam is located on the Licking River approximately 8.5 miles above the mouth of the river and 83.4 miles above the mouth of the Muskingum River. 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. Two dikes, which are a associated structures to Dillon Dam, are located north and northwest of the dam. Those dikes are named Nashport Dike and Pleasant Valley Dike.\n\nThe earthen dam has a length of 1,400 feet and a height of 118 feet. Normal outflow is controlled through gates on the intake structure and flow into a tunnel through the dam\u2019s left abutment. Discharge energy is then dissipated downstream by a conventional jump-type stilling basin. There is one unregulated emergency spillway that would go into operation during extreme flood events to prevent the dam from overtopping. \n\nThe dam helps regulate waters coming from the Licking River in the 742 square mile drainage area upstream of the dam. The dam helps to provide flood risk management downstream along the Licking River, to the lower section of Zanesville, Ohio, with additional benefits to McConnelsville, Ohio and other points downstream on the Muskingum and Ohio River. Dillon Dam provides waters to keep downstream rivers flowing. However, when it is projected that the Licking River may cause flooding, water coming from upstream of the dam is stored until streams and rivers downstream of the dam recede. Typically storm waters can be released in a controlled manner to reduce flood impacts downstream. However, there are rare storms which can cause more rainfall and runoff than Dillon Dam can store safely. When this occurs, the dam\u2019s uncontrolled spillway will begin to release or spill these waters to reduce the chance that the dam could be overtopped. \n\nWhen the dam is not storing flood waters to reduce flood risks downstream, the dam operates to impound water for flood control, recreation, fish and wildlife enhancement and low-flow augmentation. This lake is raised in the warmer months to support boat access and lowered in the winter months for additional flood storage.", "riskCharSummary":"Dillon Dam and the associated dikes significantly reduce the risk of flooding to surrounding communities. However, it does not eliminate the risk. Although Dillon Dam, Nashport Dike, and Pleasant Valley Dike have historically performed well, extreme rain events may cause areas downstream to be flooded. The U.S. Army Corps of Engineers completed a risk assessment for Dillon Dam and associated dikes in 2017 and classified the risk associated with failure for all three as low. This risk categorization is based on the risk of rare storm events occurring which would cause more rainfall than the dam and dikes can safely store. During such an event, the uncontrolled spillway near the left abutment of the dam has the potential to pass 89,200 cubic feet per second. The operation of the spillway would be necessary to prevent the dam from overtopping and potentially breaching. \n\nWhile the Dillon Dam spillway has never flowed, if operated it could result in significant flooding in downstream communities from Zanesville, Ohio to Marietta, Ohio. In fact, impacts could be seen all the way down to the confluence of the Ohio River. Furthermore, when the reservoir is high enough to cause spillway flow there would be additional flow upstream of the dam at two low points around the reservoir, near Township Hall and Black Run. Depending on the amount of water released, significant damages to houses, buildings, factories, roads, bridges, power, and water supply may occur. Critical infrastructure, including roadways (evacuation routes) and bridges along the Licking River may not be passable due to high flood waters during spillway flows. Although the odds of such a storm event occurring are considered extremely unlikely, Dillon Dam and the associated Dikes have an emergency action plan to lower the risk of life loss if any unanticipated scenarios were to occur.\n\nIn the unlikely event Dillon 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 Dillon Dam, Nashport Dike, and Pleasant Valley Dike. The dam and its connected dikes are well maintained through continuous operations and maintenance activities, and the U.S. Army Corps of Engineers conducts detailed inspections of the project during both normal lake levels and during flood events. Supplementing these inspections, the dam has a specialized instrumentation and monitoring system to allow U.S. Army Corps of Engineers staff to continually evaluate the dam for changing conditions. Risk management and emergency response actions are being supported by conducting emergency exercises and dam safety training with U.S. Army Corps of Engineer staff and local and state emergency responders. Additionally, the dam\u2019s Emergency Action Plan is routinely updated to improve emergency response actions.", "riverName":"LICKING RIVER", "separateStructuresCount":2, "sourceAgency":"US Army Corps of Engineers", "spillwayTypeId":3, "spillwayWidth":292, "stateFedId":"OH00007", "stateRegulatoryAgency":null, "stateRegulatedId":0, "structuralHeight":118, "submitDate":"2023-12-01T17:49:56.486Z", "surfaceArea":1560, "volume":1670900, "widthOfLocks":0, "secondaryWidthOfLocks":null, "yearCompleted":1960, "congDist":"Congressional District 12, Ohio", "city":"ZANESVILLE", "county":"Muskingum", "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":"Dillon Lake", "ownerNames":"USACE - Huntington District", "ownerTypeIds":"3", "primaryDamTypeId":8, "primaryOwnerTypeId":3, "primaryPurposeId":9, "purposeIds":"9;4;5", "dsacId":4, "femaRegion":"5", "lastEapExcerDate":"2024-04-06T12:00:00.000Z", "dataUpdated":"2025-06-18T12:00:00.000Z", "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, "thirtyYearAverage":26.8425, "tenthPercentile":22.2904, "ninetiethPercentile":40.496 }, "id":537108, "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/537108?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/537108?f=jsonld" }, { "rel":"alternate", "type":"text/html", "title":"This document as HTML", "href":"https://api.wwdh.internetofwater.app/collections/usace-edr/items/537108?f=html" }, { "rel":"collection", "type":"application/json", "title":"USACE Access2Water API", "href":"https://api.wwdh.internetofwater.app/collections/usace-edr" } ] }