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"latest_value":365200, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.bottom of normal", "label":"Bottom of Normal", "parameter":"Stor", "base_parameter":"Stor", "tsid":"FGIB.Stor.Inst.0.Bottom of Normal", "latest_value":311300, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.bottom of power", "label":"Bottom of Power", "parameter":"Stor", "base_parameter":"Stor", "tsid":"FGIB.Stor.Inst.0.Bottom of Power", "latest_value":311300, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.maximum pool", "label":"Maximum Pool", "parameter":"Stor", "base_parameter":"Stor", "tsid":"FGIB.Stor.Inst.0.Maximum Pool", "latest_value":1284400, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.spillway crest", "label":"Spillway Crest", "parameter":"Stor", "base_parameter":"Stor", "tsid":"FGIB.Stor.Inst.0.Spillway Crest", "latest_value":248400, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of conservation", "label":"Top of Conservation", "parameter":"Stor", "base_parameter":"Stor", "tsid":"FGIB.Stor.Inst.0.Top of Conservation", "latest_value":365200, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of constant conservation", "label":"Top of Constant Conservation", "parameter":"Stor", "base_parameter":"Stor", "tsid":"FGIB.Stor.Inst.0.Top of Constant Conservation", "latest_value":365200, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of dam", "label":"Top of Dam", "parameter":"Stor", "base_parameter":"Stor", "tsid":"FGIB.Stor.Inst.0.Top of Dam", "latest_value":1929700, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of flood", "label":"Top of Flood", "parameter":"Stor", "base_parameter":"Stor", "tsid":"FGIB.Stor.Inst.0.Top of Flood", "latest_value":1284400, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of inactive", "label":"Top of Inactive", "parameter":"Stor", "base_parameter":"Stor", "tsid":"FGIB.Stor.Inst.0.Top of Inactive", "latest_value":311300, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of normal", "label":"Top of Normal", "parameter":"Stor", "base_parameter":"Stor", "tsid":"FGIB.Stor.Inst.0.Top of Normal", "latest_value":365200, "units":"ac-ft", "units_long_name":"Acre-feet" } ], "id":550227, "associatedStructuresCount":8, "conditionAssessDate":null, "conditionAssessDetail":null, "conditionAssessId":6, "damHeight":110, "damLength":2990, "distance":null, "drainageArea":12494, "eapId":1, "dsacAssignedDate":"2015-07-11T12:00:00.000Z", "eapMeetsGuidelinesId":1, "emergencyContactsUpdated":"2025-07-10T12:00:00.000Z", "eapLastRevDate":"2024-05-07T12:00:00.000Z", "enforcementAuthorityId":0, "federalId":"OK10314", "oldFederalId":"OK10314", "hazardId":4, "hydraulicHeight":99, "inspectionAuthorityId":0, "inspectionDate":"2024-10-07T12:00:00.000Z", "inspectionFrequency":5, "jurisdictionAuthorityId":0, "latitude":35.86965013, "lengthOfLocks":0, "secondaryLengthOfLocks":null, "longitude":-95.230827145, "maxDischarge":986000, "maxStorage":1284400, "nidHeight":110, "nidStorage":1284400, "normalStorage":365200, "numberOfLocks":0, "operationalStatusDate":"2015-07-11T12:00:00.000Z", "operationalStatusId":1, "originalDesignerName":null, "otherStructureId":null, "permittingAuthorityId":0, "politicalPartyId":null, "privateDamId":null, "projectDescription":"The United States Army Corps of Engineers (USACE) completed construction of Fort Gibson Dam in 1953 with the primary purpose to reduce flooding downstream as well as hydropower generation, water supply, and navigation. Fort Gibson is located on Grand River, about 5 miles north of Fort Gibson, Oklahoma and approximately 12 miles northeast of Muskogee, Oklahoma. During large storm events, the dam holds back excess water to reduce flooding downstream. Water storage and releases are managed by a large gated spillway. This spillway is flanked on each side by concrete dam sections and earthen embankments. The project also includes a hydroelectric power plant that began operating in 1953 that generates power for the community of Mayes, Wagoner, and Cherokee Counties. The total length of the dam including the spillway is 2,990 feet, and the maximum height above the streambed is 110 feet. Oklahoma State Highway 251A runs across the top of the dam, which connects the towns of Okay and Fort Gibson. Associated with the Dam is also Oklahoma Ordnance Works Levee and seven dikes. Oklahoma Ordnance Works Levee (OOWL) is located in Pryor, OK. Dikes 1, 2, 3, 8, 9, and 11 prevent Fort Gibson pool from crossing over to the Verdigris River Basin during high lake levels. In addition, Dikes 1, 2, and 3 protect the town of Okay from Fort Gibson reservoir. Dike 10 protects the town of Wagoner, Oklahoma from the flood pools associated with Fort Gibson Dam.", "riskCharSummary":"USACE completed a risk assessment in 2015 and classified the risk associated with Fort Gibson Dam as low. Although extremely unlikely, the primary risks to the integrity of the dam are the potential for: (1) sliding or overturning of the concrete dam sections during high lake levels, and (2) water seeping at the base of the earthen dam eventually weakens the dam and leads to embankment slope failure. In the remote event of a dam failure, the most immediate impacted areas with the major population center would be the towns of Fort Gibson, Muskogee, and Okay. Other impacted areas include the towns of River Bottom, Webbers Falls, Moffett, Arkoma, Pocola, and Ft. Smith. Failure of the dam would result in widespread flooding in these areas resulting in loss of life and damage to infrastructure along the river and within the inundation path. \nA more likely flooding scenario is the potential for large releases out of the spillway gates due to a large flood as part of normal operation. Although the flooding for this scenario would be less than expected for a dam breach life loss and economic impacts could still occur due to the extent of flooding.", "riskManagementMeasures":"USACE is taking several actions to manage and reduce the risk that Fort Gibson Dam poses to the surrounding communities. This includes conducting emergency exercises with local and state emergency responders to enhance evacuation planning, routine updates to the Emergency Action Plan to improve emergency response actions, and development of a detailed communication plan for the project. Additionally, the dam and dikes are well maintained through continuous operations and maintenance activities and USACE conducts detailed inspections of the project during both normal lake levels and during flood events to ensure the integrity of the structures. Lastly, the dam has an instrumentation and monitoring program to allow USACE staff to evaluate the dam for changing conditions.", "riverName":"GRAND RIVER", "separateStructuresCount":9, "sourceAgency":"US Army Corps of Engineers", "spillwayTypeId":1, "spillwayWidth":1490, "stateFedId":"OK10314", "stateRegulatoryAgency":null, "stateRegulatedId":0, "structuralHeight":110, "submitDate":"2023-02-16T17:25:21.158Z", "surfaceArea":19900, "volume":804600, "widthOfLocks":0, "secondaryWidthOfLocks":null, "yearCompleted":1949, "congDist":"Congressional District 02, Oklahoma", "city":"FORT GIBSON", "county":"Wagoner", "aiannh":"Cherokee OTSA", "websiteUrl":"https://www.swt.usace.army.mil/Locations/Tulsa-District-Lakes/Oklahoma/Fort-Gibson-Lake/", "coreTypeIds":"3", "damTypeIds":"9;8", "fedConstructionIds":"1", "fedDesignIds":"1", "fedFundingIds":"1", "fedInspectionIds":"1", "fedOperationIds":"1", "fedOtherIds":"1", "fedOwnerIds":"1", "fedRegulatoryIds":"1", "formerNames":null, "foundationTypeIds":"1", "nonFederalDamOnFederalId":0, "designerNames":"CESWT", "otherNames":"Fort Gibson Lake", "ownerNames":"USACE - Tulsa District", "ownerTypeIds":"3", "primaryDamTypeId":9, "primaryOwnerTypeId":3, "primaryPurposeId":9, "purposeIds":"9;6", "dsacId":4, "femaRegion":"6", "lastEapExcerDate":"2025-07-10T12:00:00.000Z", "dataUpdated":"2025-07-15T18:57:17.628Z", "usaceDistrict":"Tulsa District", "noConsequencesId":0, "secretaryAgricultureBuiltId":null, "nrcsWatershedAuthorizationId":null, "isAssociatedStructureId":"No", "fedRegulatedId":"Yes", "inundationNidAddedId":1, "damStatusId":2, "huc06":"110702", "doi_region":"ART", "doi_region_name":"Arkansas-Rio Grande-Texas Gulf", "doi_region_number":6, "thirtyYearAverage":540.1006, "tenthPercentile":446.2896, "ninetiethPercentile":578.5774 }, "id":3690051, "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/3690051?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/3690051?f=jsonld" }, { "rel":"alternate", "type":"text/html", "title":"This document as HTML", "href":"https://api.wwdh.internetofwater.app/collections/usace-edr/items/3690051?f=html" }, { "rel":"collection", "type":"application/json", "title":"USACE Access2Water API", "href":"https://api.wwdh.internetofwater.app/collections/usace-edr" } ] }