{ "bbox":null, "type":"Feature", "geometry":{ "bbox":null, "type":"Point", "coordinates":[ -121.13, 45.61 ] }, "properties":{ "provider":"NWDP", "code":"TDA", "slug":"tda", "elevation":null, "horizontal_datum":"WGS84", "vertical_datum":"NGVD29", "state":"OR", "kind":"PROJECT", "nearest_city":"", "public_name":"The Dalles Lock and Dam", "location_code":51731029, "nsid":null, "aliases":{ "USGS Station Number":"14103950", "NIDID":"OR00002" }, "timeseries":[ { "tsid":"TDA.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":300060.0, "delta24h":null, "sort_order":11, "results":null }, { "tsid":"TDA.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":158.38, "delta24h":null, "sort_order":1, "results":null }, { "tsid":"TDA.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":187900.0, "delta24h":null, "sort_order":7, "results":null }, { "tsid":"TDA.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":199300.0, "delta24h":null, "sort_order":6, "results":null } ], "name":"The Dalles Lock and Dam", "hasResopsAverages":"false", "nidId":"OR00002", "nidid":"", "levels":[ { "slug":"elev.bottom of flood", "label":"Bottom of Flood", "parameter":"Elev", "base_parameter":"Elev", "tsid":"TDA.Elev.Inst.0.Bottom of Flood", "latest_value":160, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.spillway crest", "label":"Spillway Crest", "parameter":"Elev", "base_parameter":"Elev", "tsid":"TDA.Elev.Inst.0.Spillway Crest", "latest_value":121, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.streambed", "label":"Streambed", "parameter":"Elev", "base_parameter":"Elev", "tsid":"TDA.Elev.Inst.0.Streambed", "latest_value":55, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of dam", "label":"Top of Dam", "parameter":"Elev", "base_parameter":"Elev", "tsid":"TDA.Elev.Inst.0.Top of Dam", "latest_value":185, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of flood control", "label":"Top of Flood Control", "parameter":"Elev", "base_parameter":"Elev", "tsid":"TDA.Elev.Inst.0.Top of Flood Control", "latest_value":182.3, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of normal", "label":"Top of Normal", "parameter":"Elev", "base_parameter":"Elev", "tsid":"TDA.Elev.Inst.0.Top of Normal", "latest_value":160, "units":"ft", "units_long_name":"Feet" }, { "slug":"stor.bottom of flood", "label":"Bottom of Flood", "parameter":"Stor", "base_parameter":"Stor", "tsid":"TDA.Stor.Inst.0.Bottom of Flood", "latest_value":310000, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of flood", "label":"Top of Flood", "parameter":"Stor", "base_parameter":"Stor", "tsid":"TDA.Stor.Inst.0.Top of Flood", "latest_value":554900, "units":"ac-ft", "units_long_name":"Acre-feet" } ], "id":550073, "associatedStructuresCount":0, "conditionAssessDate":null, "conditionAssessDetail":null, "conditionAssessId":6, "damHeight":116, "damLength":8735, "distance":null, "drainageArea":237000, "eapId":1, "dsacAssignedDate":"2019-03-29T12:00:00.000Z", "eapMeetsGuidelinesId":1, "emergencyContactsUpdated":"2025-06-03T12:00:00.000Z", "eapLastRevDate":"2008-08-25T12:00:00.000Z", "enforcementAuthorityId":1, "federalId":"OR00002", "oldFederalId":"OR00002", "hazardId":4, "hydraulicHeight":114, "inspectionAuthorityId":1, "inspectionDate":"2023-04-12T12:00:00.000Z", "inspectionFrequency":5, "jurisdictionAuthorityId":1, "latitude":45.61483176, "lengthOfLocks":675, "secondaryLengthOfLocks":null, "longitude":-121.1357264, "maxDischarge":2290000, "maxStorage":330000, "nidHeight":200, "nidStorage":330000, "normalStorage":277000, "numberOfLocks":1, "operationalStatusDate":"2019-03-29T12:00:00.000Z", "operationalStatusId":1, "originalDesignerName":null, "otherStructureId":null, "permittingAuthorityId":1, "politicalPartyId":null, "privateDamId":null, "projectDescription":"The Dalles Lock & Dam is located on the Columbia River 2 miles upstream of The Dalles, Ore., and 22 miles upstream of Hood River, Ore. The Dalles Lock & Dam is a 200 ft tall, 8,735 ft long concrete gravity dam with a concrete spillway with twenty-three spillway gates, a navigation lock, two fishways, and a powerhouse. The Dalles 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 1952 and was completed in 1957. The powerhouse began operation in 1960 with additional hydroelectric capacity added in 1972. The Dalles 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. The Dalles Lock & Dam is specifically authorized to provide hydropower, navigation, irrigation, recreation, and fish and wildlife conservation.", "riskCharSummary":"USACE completed a routine risk assessment for The Dalles Lock & Dam in 2018 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. 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. USACE performs risk assessments as part of an ongoing dam safety program and to assist in the prioritization of investment for aging infrastructure. \n\nUSACE is confident that its dams are well-built, well-maintained, and will continue to provide significant benefits for the region. Dams help to 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. The Dalles Lock & Dam is equipped with instrumentation to monitor dam performance. USACE conducts routine dam safety exercises with local Emergency Managers and first responders. The Dalles 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":1441, "stateFedId":"OR00002", "stateRegulatoryAgency":"OWRD", "stateRegulatedId":1, "structuralHeight":200, "submitDate":"2023-02-16T17:25:31.637Z", "surfaceArea":11200, "volume":3061000, "widthOfLocks":86, "secondaryWidthOfLocks":null, "yearCompleted":1957, "congDist":"Congressional District 04, Washington", "city":"THE DALLES", "county":"Klickitat", "aiannh":null, "websiteUrl":"https://www.nwp.usace.army.mil/The-Dalles/", "coreTypeIds":"2", "damTypeIds":"9", "fedConstructionIds":"1", "fedDesignIds":"1", "fedFundingIds":"1", "fedInspectionIds":"1", "fedOperationIds":"1", "fedOtherIds":"1", "fedOwnerIds":"1", "fedRegulatoryIds":"1", "formerNames":null, "foundationTypeIds":"1", "nonFederalDamOnFederalId":0, "designerNames":"CENWP", "otherNames":"Lake Celilo", "ownerNames":"USACE - Portland District", "ownerTypeIds":"3", "primaryDamTypeId":9, "primaryOwnerTypeId":3, "primaryPurposeId":3, "purposeIds":"3;12;2;5;6", "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":51731029, "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/51731029?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/51731029?f=jsonld" }, { "rel":"alternate", "type":"text/html", "title":"This document as HTML", "href":"https://api.wwdh.internetofwater.app/collections/usace-edr/items/51731029?f=html" }, { "rel":"collection", "type":"application/json", "title":"USACE Access2Water API", "href":"https://api.wwdh.internetofwater.app/collections/usace-edr" } ] }