{ "bbox":null, "type":"Feature", "geometry":{ "bbox":null, "type":"Point", "coordinates":[ -120.69367, 45.71485 ] }, "properties":{ "provider":"NWDP", "code":"JDA", "slug":"jda", "elevation":null, "horizontal_datum":"WGS84", "vertical_datum":"NGVD29", "state":"OR", "kind":"PROJECT", "nearest_city":"", "public_name":"John Day Lock and Dam", "location_code":52364029, "nsid":null, "aliases":{ "USGS Station Number":"14048006", "NIDID":"OR00011" }, "timeseries":[ { "tsid":"JDA.Flow-Out.Ave.1Hour.1Hour.CBT-REV", "label":"Outflow", "base_parameter":"Flow", "parameter":"Flow-Out", "unit":"cfs", "unit_long_name":"Cubic feet per second", "latest_time":"2026-04-14T22:00:00Z", "latest_value":213500.0, "delta24h":null, "sort_order":7, "results":null }, { "tsid":"JDA.Elev-Tailwater.Inst.1Hour.0.CBT-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":161.32, "delta24h":null, "sort_order":3, "results":null }, { "tsid":"JDA.Stor.Inst.1Hour.0.CBT-COMPUTED-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":390140.0, "delta24h":null, "sort_order":11, "results":null }, { "tsid":"JDA.Flow-In.Ave.~1Day.1Day.CBT-REV", "label":"Inflow", "base_parameter":"Flow", "parameter":"Flow-In", "unit":"cfs", "unit_long_name":"Cubic feet per second", "latest_time":"2026-04-14T07:00:00Z", "latest_value":211300.0, "delta24h":null, "sort_order":6, "results":null }, { "tsid":"JDA.Elev-Forebay.Ave.~1Day.1Day.CBT-REV", "label":"Elevation", "base_parameter":"Elev", "parameter":"Elev-Forebay", "unit":"ft", "unit_long_name":"Feet", "latest_time":"2026-04-14T07:00:00Z", "latest_value":264.83, "delta24h":null, "sort_order":1, "results":null } ], "name":"John Day Lock and Dam", "hasResopsAverages":"false", "nidId":"OR00011", "nidid":"", "levels":[ { "slug":"elev.bottom of flood", "label":"Bottom of Flood", "parameter":"Elev", "base_parameter":"Elev", "tsid":"JDA.Elev.Inst.0.Bottom of Flood", "latest_value":268, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.spillway crest", "label":"Spillway Crest", "parameter":"Elev", "base_parameter":"Elev", "tsid":"JDA.Elev.Inst.0.Spillway Crest", "latest_value":210, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.streambed", "label":"Streambed", "parameter":"Elev", "base_parameter":"Elev", "tsid":"JDA.Elev.Inst.0.Streambed", "latest_value":161, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of dam", "label":"Top of Dam", "parameter":"Elev", "base_parameter":"Elev", "tsid":"JDA.Elev.Inst.0.Top of Dam", "latest_value":281, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of flood", "label":"Top of Flood", "parameter":"Elev", "base_parameter":"Elev", "tsid":"JDA.Elev.Inst.0.Top of Flood", "latest_value":276.5, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of normal", "label":"Top of Normal", "parameter":"Elev", "base_parameter":"Elev", "tsid":"JDA.Elev.Inst.0.Top of Normal", "latest_value":268, "units":"ft", "units_long_name":"Feet" }, { "slug":"stor.bottom of flood", "label":"Bottom of Flood", "parameter":"Stor", "base_parameter":"Stor", "tsid":"JDA.Stor.Inst.0.Bottom of Flood", "latest_value":534000, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of flood", "label":"Top of Flood", "parameter":"Stor", "base_parameter":"Stor", "tsid":"JDA.Stor.Inst.0.Top of Flood", "latest_value":976000, "units":"ac-ft", "units_long_name":"Acre-feet" } ], "id":550094, "associatedStructuresCount":0, "conditionAssessDate":null, "conditionAssessDetail":null, "conditionAssessId":6, "damHeight":118, "damLength":5900, "distance":null, "drainageArea":226000, "eapId":1, "dsacAssignedDate":"2018-09-06T12:00:00.000Z", "eapMeetsGuidelinesId":1, "emergencyContactsUpdated":"2025-06-03T12:00:00.000Z", "eapLastRevDate":"2008-08-25T12:00:00.000Z", "enforcementAuthorityId":1, "federalId":"OR00011", "oldFederalId":"OR00011", "hazardId":4, "hydraulicHeight":113, "inspectionAuthorityId":1, "inspectionDate":"2022-01-20T12:00:00.000Z", "inspectionFrequency":5, "jurisdictionAuthorityId":1, "latitude":45.71794765, "lengthOfLocks":675, "secondaryLengthOfLocks":null, "longitude":-120.69539558, "maxDischarge":2250000, "maxStorage":2530000, "nidHeight":230, "nidStorage":2530000, "normalStorage":530000, "numberOfLocks":1, "operationalStatusDate":"2018-09-06T12:00:00.000Z", "operationalStatusId":1, "originalDesignerName":null, "otherStructureId":null, "permittingAuthorityId":1, "politicalPartyId":null, "privateDamId":null, "projectDescription":"John Day Lock & Dam is located on the Columbia River 27 miles upstream of The Dalles, Ore., and 47 miles upstream of Hood River, Ore. John Day Lock & Dam is a 230 ft tall, 5,900 ft long structure consisting of a rockfill embankment dam, concrete gravity dam with a concrete spillway with twenty spillway gates, a navigation lock, two fish ladders, and a powerhouse with sixteen generating units. John Day Lock & Dam is owned, operated, and maintained by the Portland District of the U.S. Army Corps of Engineers (USACE). Construction of the dam began in 1959 and was completed in 1968. The powerhouse began operation in 1971. John Day Lock & Dam is located at the downstream end of Columbia River watershed, which is approximately the size of France (240,000 square miles). Once a river with large fluctuations in flow throughout the year, the flow is regulated by hundreds of dams upstream including large reservoirs in Washington, Idaho, Montana, and Canada. John Day Lock & Dam is specifically authorized to provide flood risk management, navigation, hydropower, irrigation, fish & wildlife conservation, and recreation.", "riskCharSummary":"USACE completed a routine risk assessment for John Day Lock & Dam in 2017 that characterized the risk associated with the dam to be Low. The assessment considered a wide range of hazard scenarios from the most likely to the most extreme and unlikely. USACE performs risk assessments as part of an ongoing dam safety program and to assist in the prioritization of investment for aging infrastructure. The risk assessments evaluate the life safety risks associated with the dams to determine if risk reduction actions are needed and, if so, what actions should be taken. \n\nUSACE is confident that its dams are well-built, well-maintained, and will continue to provide significant benefits for the region. Dams reduce flood risks. However, dams cannot eliminate potential for flooding. Extreme rainfall and snowmelt events may result in flooding in areas downstream of dams. Flooding can be caused by high flows from unregulated portions of the watershed and/or high flow that must be passed through the dam outlets and spillways when reservoir storage capacities are exceeded.", "riskManagementMeasures":"USACE regularly conducts routine inspections of its dams. John Day Lock & Dam is equipped with instrumentation to monitor dam performance. USACE conducts routine dam safety exercises with local Emergency Managers and first responders. John Day Lock & Dam\u2019s Emergency Action Plan (EAP) outlines actions to be taken during an emergency. USACE will update the EAP based on recent risk assessment results and information from updated inundation maps. In addition, USACE will continue and increase its outreach to improve community awareness of flood risks and risks associated with the dam.", "riverName":"COLUMBIA RIVER", "separateStructuresCount":0, "sourceAgency":"US Army Corps of Engineers", "spillwayTypeId":1, "spillwayWidth":1252, "stateFedId":"OR00011", "stateRegulatoryAgency":"OWRD", "stateRegulatedId":1, "structuralHeight":230, "submitDate":"2023-02-16T17:25:29.545Z", "surfaceArea":55000, "volume":2830000, "widthOfLocks":86, "secondaryWidthOfLocks":null, "yearCompleted":1968, "congDist":"Congressional District 04, Washington", "city":"RUFUS", "county":"Klickitat", "aiannh":null, "websiteUrl":"https://www.nwp.usace.army.mil/John-Day/", "coreTypeIds":"2", "damTypeIds":"8", "fedConstructionIds":"1", "fedDesignIds":"1", "fedFundingIds":"1", "fedInspectionIds":"1", "fedOperationIds":"1", "fedOtherIds":"1", "fedOwnerIds":"1", "fedRegulatoryIds":"1", "formerNames":null, "foundationTypeIds":"1", "nonFederalDamOnFederalId":0, "designerNames":null, "otherNames":"Lake Umatilla", "ownerNames":"USACE - Portland District", "ownerTypeIds":"3", "primaryDamTypeId":8, "primaryOwnerTypeId":3, "primaryPurposeId":3, "purposeIds":"3;12;2;5;6;9", "dsacId":4, "femaRegion":"10", "lastEapExcerDate":"2025-06-03T12:00:00.000Z", "dataUpdated":"2025-06-03T12:00:00.000Z", "usaceDistrict":"Portland District", "noConsequencesId":0, "secretaryAgricultureBuiltId":null, "nrcsWatershedAuthorizationId":null, "isAssociatedStructureId":"No", "fedRegulatedId":"Yes", "inundationNidAddedId":1, "damStatusId":2, "huc06":"170701", "doi_region":"CPN", "doi_region_name":"Columbia-Pacific Northwest", "doi_region_number":9 }, "id":52364029, "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/52364029?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/52364029?f=jsonld" }, { "rel":"alternate", "type":"text/html", "title":"This document as HTML", "href":"https://api.wwdh.internetofwater.app/collections/usace-edr/items/52364029?f=html" }, { "rel":"collection", "type":"application/json", "title":"USACE Access2Water API", "href":"https://api.wwdh.internetofwater.app/collections/usace-edr" } ] }