{ "bbox":null, "type":"Feature", "geometry":{ "bbox":null, "type":"Point", "coordinates":[ -83.0692, 40.3592 ] }, "properties":{ "provider":"LRH", "code":"Delaware", "slug":"delaware", "elevation":878.42, "horizontal_datum":"WGS84", "vertical_datum":"NGVD29", "state":"OH", "kind":"PROJECT", "nearest_city":"Delaware", "public_name":"Delaware Lake", "location_code":871108, "nsid":null, "aliases":{ "Local Loc ID":"DDO", "NIDID":"OH00015" }, "timeseries":[ { "tsid":"Delaware-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":2.35, "delta24h":null, "sort_order":5, "results":null }, { "tsid":"Delaware-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":914.32, "delta24h":null, "sort_order":2, "results":null }, { "tsid":"Delaware-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":211.46, "delta24h":null, "sort_order":7, "results":null }, { "tsid":"Delaware-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":915.35, "delta24h":null, "sort_order":1, "results":null }, { "tsid":"Delaware-Lake.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":"Delaware-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":14455.0, "delta24h":null, "sort_order":13, "results":null }, { "tsid":"Delaware-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":158.92, "delta24h":null, "sort_order":6, "results":null }, { "tsid":"Delaware-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":14455.0, "delta24h":null, "sort_order":11, "results":null } ], "name":"Delaware Lake", "hasResopsAverages":"false", "nidId":"OH00015", "nidid":"", "levels":[ { "slug":"elev.bottom of conservation", "label":"Bottom of Conservation", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Delaware.Elev.Inst.0.Bottom of Conservation", "latest_value":881, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.bottom of flood", "label":"Bottom of Flood", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Delaware.Elev.Inst.0.Bottom of Flood", "latest_value":915, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.streambed", "label":"Streambed", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Delaware.Elev.Inst.0.Streambed", "latest_value":880, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of dam", "label":"Top of Dam", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Delaware.Elev.Inst.0.Top of Dam", "latest_value":957, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of flood", "label":"Top of Flood", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Delaware.Elev.Inst.0.Top of Flood", "latest_value":947, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of flood threat", "label":"Top of Flood Threat", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Delaware.Elev.Inst.0.Top of Flood Threat", "latest_value":935, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of inactive", "label":"Top of Inactive", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Delaware.Elev.Inst.0.Top of Inactive", "latest_value":881, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of normal", "label":"Top of Normal", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Delaware.Elev.Inst.0.Top of Normal", "latest_value":914.91, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of record", "label":"Top of Record", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Delaware.Elev.Inst.0.Top of Record", "latest_value":945.4, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of recreation", "label":"Top of Recreation", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Delaware.Elev.Inst.0.Top of Recreation", "latest_value":915, "units":"ft", "units_long_name":"Feet" }, { "slug":"stor.bottom of flood", "label":"Bottom of Flood", "parameter":"Stor", "base_parameter":"Stor", "tsid":"Delaware.Stor.Inst.0.Bottom of Flood", "latest_value":14000, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of dam", "label":"Top of Dam", "parameter":"Stor", "base_parameter":"Stor", "tsid":"Delaware.Stor.Inst.0.Top of Dam", "latest_value":256000, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of flood", "label":"Top of Flood", "parameter":"Stor", "base_parameter":"Stor", "tsid":"Delaware.Stor.Inst.0.Top of Flood", "latest_value":132000, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of inactive", "label":"Top of Inactive", "parameter":"Stor", "base_parameter":"Stor", "tsid":"Delaware.Stor.Inst.0.Top of Inactive", "latest_value":0, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of normal", "label":"Top of Normal", "parameter":"Stor", "base_parameter":"Stor", "tsid":"Delaware.Stor.Inst.0.Top of Normal", "latest_value":13980.29, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of recreation", "label":"Top of Recreation", "parameter":"Stor", "base_parameter":"Stor", "tsid":"Delaware.Stor.Inst.0.Top of Recreation", "latest_value":14000, "units":"ac-ft", "units_long_name":"Acre-feet" } ], "id":550209, "associatedStructuresCount":1, "conditionAssessDate":null, "conditionAssessDetail":null, "conditionAssessId":6, "damHeight":null, "damLength":18600, "distance":3, "drainageArea":386, "eapId":1, "dsacAssignedDate":"2019-03-30T12:00:00.000Z", "eapMeetsGuidelinesId":1, "emergencyContactsUpdated":"2024-07-15T12:00:00.000Z", "eapLastRevDate":"2009-10-16T12:00:00.000Z", "enforcementAuthorityId":0, "federalId":"OH00015", "oldFederalId":"OH00015", "hazardId":4, "hydraulicHeight":66, "inspectionAuthorityId":0, "inspectionDate":"2021-04-16T12:00:00.000Z", "inspectionFrequency":5, "jurisdictionAuthorityId":0, "latitude":40.358883753, "lengthOfLocks":0, "secondaryLengthOfLocks":null, "longitude":-83.0689993889999, "maxDischarge":96000, "maxStorage":132000, "nidHeight":92, "nidStorage":132000, "normalStorage":14000, "numberOfLocks":0, "operationalStatusDate":"2019-03-30T12:00:00.000Z", "operationalStatusId":2, "originalDesignerName":null, "otherStructureId":null, "permittingAuthorityId":0, "politicalPartyId":null, "privateDamId":null, "projectDescription":"Delaware Dam was designed and built by the Huntington District of the U.S. Army Corps of Engineers. The project was authorized by the Flood Control Act of 1938, Public No. 761, Seventy-fifth Congress, Third Session on 28 June 1938 as part of a comprehensive flood control plan for the Ohio River Basin. Delaware Dam and Reservoir is located 32.4 miles above the mouth of the scenic Olentangy River, a tributary of the Scioto River near Delaware, Ohio. The dam is a multipurpose dam designed for flood reduction, pollution reduction, water supply, water quality control, recreation, and fish and wildlife management. It was constructed between 1947 and 1951 and is operated by the U.S. Army Corps of Engineers, Huntington District. At a length of 18,600 feet and a height of 92 feet with a concrete spillway, Delaware Dam controls a drainage area of 381 square miles. Cumulative flood damages prevented are about $124 million over the project life and average about $2.3 million annually.", "riskCharSummary":"The dam significantly reduces the risk of flooding to surrounding communities. However, it does not entirely eliminate the risk. Although the Delaware Dam has historically performed well, extreme rainfall events may cause areas downstream to be flooded. Even when the dam operates as intended, downstream flooding could still occur if a very large rainfall event were to require unusually large quantities of water to be released through the dam gates. In extreme cases, this flooding could be similar to what was experienced prior to the dam's construction. \n\nUS Army Corps of Engineers completed a risk assessment for Delaware Dam in September 2018 and classified the risk associated with failure as High to Moderate. Although these scenarios are considered extremely unlikely, Delaware Dam has an emergency action plan to lower the risk of life loss if any unanticipated scenarios were to occur.", "riskManagementMeasures":"The U.S. Army Corps of Engineers conducts numerous activities daily to manage risks at both Delaware Dam and Waldo Levee. Both infrastructures are well-maintained through continuous operations and maintenance activities. Detailed inspections of Delaware Dam and the Waldo Levee system are carried out during normal lake levels and flood events.\n\nTo supplement these inspections, both sites have specialized instrumentation and monitoring systems. These allow U.S. Army Corps of Engineers staff to continually evaluate the dam for changing conditions and examine the dam during high water conditions at Waldo Levee. Risk management and emergency response actions are bolstered by conducting emergency exercises and dam/levee safety training with U.S. Army Corps of Engineers staff and local and state emergency responders. Furthermore, Emergency Action Plans for both locations are routinely updated to improve emergency response actions, and flood fighting materials are stored onsite at Delaware Dam and nearby Waldo Levee in case of an emergency.", "riverName":"OLENTANGY RIVER", "separateStructuresCount":1, "sourceAgency":"US Army Corps of Engineers", "spillwayTypeId":1, "spillwayWidth":192, "stateFedId":"OH00015", "stateRegulatoryAgency":null, "stateRegulatedId":0, "structuralHeight":92, "submitDate":"2023-12-11T16:15:05.557Z", "surfaceArea":1300, "volume":1287000, "widthOfLocks":0, "secondaryWidthOfLocks":null, "yearCompleted":1951, "congDist":"Congressional District 04, Ohio", "city":"DELAWARE", "county":"Delaware", "aiannh":null, "websiteUrl":"https://www.lrh.usace.army.mil/Missions/Civil-Works/Dam-Safety-Program/", "coreTypeIds":"3", "damTypeIds":"11;8;9", "fedConstructionIds":"1", "fedDesignIds":"1", "fedFundingIds":"1", "fedInspectionIds":"1", "fedOperationIds":"1", "fedOtherIds":"1", "fedOwnerIds":"1", "fedRegulatoryIds":"1", "formerNames":null, "foundationTypeIds":"1;3", "nonFederalDamOnFederalId":0, "designerNames":"CELRH", "otherNames":"Delaware Lake", "ownerNames":"USACE - Huntington District", "ownerTypeIds":"3", "primaryDamTypeId":11, "primaryOwnerTypeId":3, "primaryPurposeId":9, "purposeIds":"9;12;4;5;8", "dsacId":3, "femaRegion":"5", "lastEapExcerDate":"2024-05-16T12:00:00.000Z", "dataUpdated":"2025-04-21T12:00:00.000Z", "usaceDistrict":"Huntington District", "noConsequencesId":0, "secretaryAgricultureBuiltId":null, "nrcsWatershedAuthorizationId":null, "isAssociatedStructureId":"No", "fedRegulatedId":"Yes", "inundationNidAddedId":1, "damStatusId":2, "huc06":"050600", "doi_region":null, "doi_region_name":"Great Lakes", "doi_region_number":3 }, "id":871108, "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/871108?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/871108?f=jsonld" }, { "rel":"alternate", "type":"text/html", "title":"This document as HTML", "href":"https://api.wwdh.internetofwater.app/collections/usace-edr/items/871108?f=html" }, { "rel":"collection", "type":"application/json", "title":"USACE Access2Water API", "href":"https://api.wwdh.internetofwater.app/collections/usace-edr" } ] }