{ "bbox":null, "type":"Feature", "geometry":{ "bbox":null, "type":"Point", "coordinates":[ -95.535, 36.05806 ] }, "properties":{ "provider":"SWT", "code":"NEWT", "slug":"newt", "elevation":495.0, "horizontal_datum":"WGS84", "vertical_datum":"NGVD29", "state":"OK", "kind":"PROJECT", "nearest_city":"Inola, OK", "public_name":"Newt Graham LD18", "location_code":2635051, "nsid":null, "aliases":{ "NIDID":"OK10302", "CWMS Standard Naming":"NEWT", "CWMS Legacy Naming":"NEWT", "NWS Handbook 5 ID":"INLO2", "USGS Station Number":"07178620", "DCP Platform ID":"CE615266" }, "timeseries":[ { "tsid":"NEWT.Stor.Inst.1Hour.0.Ccp-Rev", "label":"Conservation Storage", "base_parameter":"Stor", "parameter":"Stor", "unit":"ac-ft", "unit_long_name":"Acre-feet", "latest_time":"2026-04-14T22:00:00Z", "latest_value":17880.1, "delta24h":null, "sort_order":13, "results":null }, { "tsid":"NEWT.Flow-Res In.Ave.~8Hours.8Hours.Rev-Ccp", "label":"Inflow", "base_parameter":"Flow", "parameter":"Flow-Res In", "unit":"cfs", "unit_long_name":"Cubic feet per second", "latest_time":"2026-04-14T13:00:00Z", "latest_value":11325.93, "delta24h":null, "sort_order":6, "results":null }, { "tsid":"NEWT.Precip-Inc.Total.1Hour.1Hour.Ccp-Rev", "label":"Precipitation", "base_parameter":"Precip", "parameter":"Precip-Inc", "unit":"in", "unit_long_name":"Inches", "latest_time":"2026-04-14T22:00:00Z", "latest_value":0.0, "delta24h":null, "sort_order":16, "results":null }, { "tsid":"NEWT.Flow-Res Out.Inst.1Hour.0.Rev-Regi-Flowgroup", "label":"Outflow", "base_parameter":"Flow", "parameter":"Flow-Res Out", "unit":"cfs", "unit_long_name":"Cubic feet per second", "latest_time":"2026-04-14T22:00:00Z", "latest_value":11471.16, "delta24h":null, "sort_order":7, "results":null }, { "tsid":"NEWT.Stor.Inst.1Hour.0.Ccp-Rev", "label":"Flood Storage", "base_parameter":"Stor", "parameter":"Stor", "unit":"ac-ft", "unit_long_name":"Acre-feet", "latest_time":"2026-04-14T22:00:00Z", "latest_value":17880.1, "delta24h":null, "sort_order":11, "results":null }, { "tsid":"NEWT.Elev.Inst.1Hour.0.Ccp-Rev", "label":"Elevation", "base_parameter":"Elev", "parameter":"Elev", "unit":"ft", "unit_long_name":"Feet", "latest_time":"2026-04-14T22:00:00Z", "latest_value":532.91, "delta24h":null, "sort_order":1, "results":null }, { "tsid":"NEWT.Elev-Tailwater.Inst.1Hour.0.Ccp-Rev", "label":"Elevation Tailwater", "base_parameter":"Elev", "parameter":"Elev-Tailwater", "unit":"ft", "unit_long_name":"Feet", "latest_time":"2026-04-14T22:00:00Z", "latest_value":513.63, "delta24h":null, "sort_order":3, "results":null }, { "tsid":"NEWT.Temp-Air.Inst.1Hour.0.Ccp-Rev", "label":"Air Temperature", "base_parameter":"Temp", "parameter":"Temp-Air", "unit":"F", "unit_long_name":"Fahrenheit", "latest_time":"2026-04-14T22:00:00Z", "latest_value":77.94, "delta24h":null, "sort_order":22, "results":null } ], "name":"Newt Graham LD18", "hasResopsAverages":"true", "nidId":"OK10302", "nidid":"", "levels":[ { "slug":"elev.auxiliary spillway crest", "label":"Auxiliary Spillway Crest", "parameter":"Elev", "base_parameter":"Elev", "tsid":"NEWT.Elev.Inst.0.Auxiliary Spillway Crest", "latest_value":533.5, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.bottom of navigation", "label":"Bottom of Navigation", "parameter":"Elev", "base_parameter":"Elev", "tsid":"NEWT.Elev.Inst.0.Bottom of Navigation", "latest_value":532, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.bottom of navigation pool", "label":"Bottom of Navigation Pool", "parameter":"Elev", "base_parameter":"Elev", "tsid":"NEWT.Elev.Inst.0.Bottom of Navigation Pool", "latest_value":532, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.bottom of normal", "label":"Bottom of Normal", "parameter":"Elev", "base_parameter":"Elev", "tsid":"NEWT.Elev.Inst.0.Bottom of Normal", "latest_value":532, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.maximum pool", "label":"Maximum Pool", "parameter":"Elev", "base_parameter":"Elev", "tsid":"NEWT.Elev.Inst.0.Maximum Pool", "latest_value":547, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.spillway crest", "label":"Spillway Crest", "parameter":"Elev", "base_parameter":"Elev", "tsid":"NEWT.Elev.Inst.0.Spillway Crest", "latest_value":506, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.streambed", "label":"Streambed", "parameter":"Elev", "base_parameter":"Elev", "tsid":"NEWT.Elev.Inst.0.Streambed", "latest_value":495, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of conservation", "label":"Top of Conservation", "parameter":"Elev", "base_parameter":"Elev", "tsid":"NEWT.Elev.Inst.0.Top of Conservation", "latest_value":532, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of dam", "label":"Top of Dam", "parameter":"Elev", "base_parameter":"Elev", "tsid":"NEWT.Elev.Inst.0.Top of Dam", "latest_value":542, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of dam - left bank", "label":"Top of Dam - Left Bank", "parameter":"Elev", "base_parameter":"Elev", "tsid":"NEWT.Elev.Inst.0.Top of Dam - Left Bank", "latest_value":542, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of dam - right bank", "label":"Top of Dam - Right Bank", "parameter":"Elev", "base_parameter":"Elev", "tsid":"NEWT.Elev.Inst.0.Top of Dam - Right Bank", "latest_value":533.5, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of inactive", "label":"Top of Inactive", "parameter":"Elev", "base_parameter":"Elev", "tsid":"NEWT.Elev.Inst.0.Top of Inactive", "latest_value":506, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of navigation", "label":"Top of Navigation", "parameter":"Elev", "base_parameter":"Elev", "tsid":"NEWT.Elev.Inst.0.Top of Navigation", "latest_value":532.5, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of navigation pool", "label":"Top of Navigation Pool", "parameter":"Elev", "base_parameter":"Elev", "tsid":"NEWT.Elev.Inst.0.Top of Navigation Pool", "latest_value":532.5, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of normal", "label":"Top of Normal", "parameter":"Elev", "base_parameter":"Elev", "tsid":"NEWT.Elev.Inst.0.Top of Normal", "latest_value":532.5, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of overflow", "label":"Top of Overflow", "parameter":"Elev", "base_parameter":"Elev", "tsid":"NEWT.Elev.Inst.0.Top of Overflow", "latest_value":533.5, "units":"ft", "units_long_name":"Feet" }, { "slug":"stor.bottom of navigation pool", "label":"Bottom of Navigation Pool", "parameter":"Stor", "base_parameter":"Stor", "tsid":"NEWT.Stor.Inst.0.Bottom of Navigation Pool", "latest_value":16762.98, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of inactive", "label":"Top of Inactive", "parameter":"Stor", "base_parameter":"Stor", "tsid":"NEWT.Stor.Inst.0.Top of Inactive", "latest_value":338.06, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of navigation", "label":"Top of Navigation", "parameter":"Stor", "base_parameter":"Stor", "tsid":"NEWT.Stor.Inst.0.Top of Navigation", "latest_value":17376.78, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of navigation pool", "label":"Top of Navigation Pool", "parameter":"Stor", "base_parameter":"Stor", "tsid":"NEWT.Stor.Inst.0.Top of Navigation Pool", "latest_value":17376.78, "units":"ac-ft", "units_long_name":"Acre-feet" } ], "id":550077, "associatedStructuresCount":0, "conditionAssessDate":null, "conditionAssessDetail":null, "conditionAssessId":6, "damHeight":48, "damLength":7367, "distance":null, "drainageArea":2034, "eapId":1, "dsacAssignedDate":"2021-08-31T12:00:00.000Z", "eapMeetsGuidelinesId":1, "emergencyContactsUpdated":"2025-07-10T12:00:00.000Z", "eapLastRevDate":"2024-03-01T12:00:00.000Z", "enforcementAuthorityId":0, "federalId":"OK10302", "oldFederalId":"OK10302", "hazardId":3, "hydraulicHeight":45, "inspectionAuthorityId":0, "inspectionDate":"2025-05-28T12:00:00.000Z", "inspectionFrequency":5, "jurisdictionAuthorityId":0, "latitude":36.058634984, "lengthOfLocks":600, "secondaryLengthOfLocks":null, "longitude":-95.537668336, "maxDischarge":155000, "maxStorage":23500, "nidHeight":48, "nidStorage":23500, "normalStorage":23500, "numberOfLocks":1, "operationalStatusDate":"2021-08-31T12:00:00.000Z", "operationalStatusId":1, "originalDesignerName":null, "otherStructureId":null, "permittingAuthorityId":0, "politicalPartyId":null, "privateDamId":null, "projectDescription":"The United States Army Corps of Engineers (USACE) completed construction of Newt Graham Lock and Dam 18 in 1970 for the primary purpose of navigation. The dam also provides recreation, and fish and wildlife benefits. Newt Graham Lock and Dam is located 8 miles southwest of Inola, OK, on the Verdigris River, a Tributary to the Arkansas River. \nThe project consists of earth embankments, a concrete spillway with gates, and a navigation lock. Under normal river conditions, the flows within the river are regulated by the concrete gated spillway to ensure river levels are high enough for navigation barge traffic. During river flooding, the spillway gates are fully opened to allow as much water to pass through the structure as possible. After the flood passes and the river level recedes, the project returns to normal river conditions.", "riskCharSummary":"USACE completed a risk assessment of Newt Graham Lock and Dam in 2020 and classified the risk as low. The risk is primarily driver by the potential for the spillway gates to fail leading to loss of navigation pool and inability to pass barge traffic. Other items that contributed to the risk include the potential for erosion along the embankment spillway contact as well as the potential for a barge to strike a spillway gate. Failure of the dam would include a disruption to navigation and economic impacts. Widespread flooding could occur downstream as part of normal operation of the dam (when the gates are fully opened during a large flood). A large increase in downstream flooding would not be expected if the dam were to fail as the dam is not designed or operated to reduce downstream flooding, but instead for navigation purposes.", "riskManagementMeasures":"There are numerous activities that USACE conducts on a day to day basis to help manage the risk that Newt Graham Lock and Dam poses to downstream communities and those that rely on river navigation. This includes conducting emergency exercises with local and state emergency responders to enhance evacuation planning, yearly updates to the Emergency Action Plan to improve emergency response actions, and development of a detailed communication plan for the dam. The dam is well maintained through continuous operations and maintenance activities, and USACE conducts detailed inspections of the dam during both normal river levels and during and after flood events to ensure the integrity of the structure. Lastly, the dam has an instrumentation and monitoring system to allow USACE staff to evaluate the dam for changing conditions. Lastly, the navigation lock chamber is periodically dewatered for inspection and repairs.", "riverName":"VERDIGRIS RIVER", "separateStructuresCount":0, "sourceAgency":"US Army Corps of Engineers", "spillwayTypeId":1, "spillwayWidth":220, "stateFedId":"OK10302", "stateRegulatoryAgency":null, "stateRegulatedId":0, "structuralHeight":48, "submitDate":"2023-02-16T17:25:20.482Z", "surfaceArea":1490, "volume":618660, "widthOfLocks":110, "secondaryWidthOfLocks":null, "yearCompleted":1970, "congDist":"Congressional District 02, Oklahoma", "city":"OKAY", "county":"Wagoner", "aiannh":"Creek OTSA", "websiteUrl":"https://www.swt.usace.army.mil/Locations/Tulsa-District-Lakes/Oklahoma/Newt-Graham-Lock-and-Dam/", "coreTypeIds":"3", "damTypeIds":"11;8;9", "fedConstructionIds":"1", "fedDesignIds":"1", "fedFundingIds":"1", "fedInspectionIds":"1", "fedOperationIds":"1", "fedOtherIds":"1", "fedOwnerIds":"1", "fedRegulatoryIds":"1", "formerNames":"Lock and Dam 18", "foundationTypeIds":"1;3", "nonFederalDamOnFederalId":0, "designerNames":"CESWT", "otherNames":"Newt Graham Lock and Dam", "ownerNames":"USACE - Tulsa District", "ownerTypeIds":"3", "primaryDamTypeId":11, "primaryOwnerTypeId":3, "primaryPurposeId":3, "purposeIds":"3", "dsacId":4, "femaRegion":"6", "lastEapExcerDate":"2025-07-10T12:00:00.000Z", "dataUpdated":"2025-07-15T12:00:00.000Z", "usaceDistrict":"Tulsa District", "noConsequencesId":1, "secretaryAgricultureBuiltId":null, "nrcsWatershedAuthorizationId":null, "isAssociatedStructureId":"No", "fedRegulatedId":"Yes", "inundationNidAddedId":2, "damStatusId":2, "huc06":"110701", "doi_region":"ART", "doi_region_name":"Arkansas-Rio Grande-Texas Gulf", "doi_region_number":6, "thirtyYearAverage":29.8522, "tenthPercentile":29.5798, "ninetiethPercentile":30.2265 }, "id":2635051, "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/2635051?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/2635051?f=jsonld" }, { "rel":"alternate", "type":"text/html", "title":"This document as HTML", "href":"https://api.wwdh.internetofwater.app/collections/usace-edr/items/2635051?f=html" }, { "rel":"collection", "type":"application/json", "title":"USACE Access2Water API", "href":"https://api.wwdh.internetofwater.app/collections/usace-edr" } ] }