{ "bbox":null, "type":"Feature", "geometry":{ "bbox":null, "type":"Point", "coordinates":[ -117.8417, 33.915 ] }, "properties":{ "provider":"SPL", "code":"Carbon Canyon", "slug":"carbon%20canyon", "elevation":403.0, "horizontal_datum":"WGS84", "vertical_datum":"NGVD29", "state":"CA", "kind":"PROJECT", "nearest_city":"Brea", "public_name":"Carbon Canyon Dam", "location_code":299145, "nsid":null, "aliases":{ "NIDID":"CA10017" }, "timeseries":[ { "tsid":"Carbon Canyon.Precip.Inst.~15Minutes.0.GOES-rev", "label":"Precipitation", "base_parameter":"Precip", "parameter":"Precip", "unit":"in", "unit_long_name":"Inches", "latest_time":"2026-04-14T22:00:00Z", "latest_value":14.8, "delta24h":null, "sort_order":16, "results":null }, { "tsid":"Carbon Canyon.Elev.Inst.0.0.Rescal", "label":"Elevation", "base_parameter":"Elev", "parameter":"Elev", "unit":"ft", "unit_long_name":"Feet", "latest_time":"2026-04-14T15:00:00Z", "latest_value":401.8, "delta24h":null, "sort_order":1, "results":null }, { "tsid":"Carbon Canyon US.Flow.Ave.0.0.Rescal", "label":"Inflow", "base_parameter":"Flow", "parameter":"Flow", "unit":"cfs", "unit_long_name":"Cubic feet per second", "latest_time":"2026-04-14T15:00:00Z", "latest_value":0.0, "delta24h":null, "sort_order":6, "results":null }, { "tsid":"Carbon Canyon.Flow.Inst.0.0.Rescal", "label":"Outflow", "base_parameter":"Flow", "parameter":"Flow", "unit":"cfs", "unit_long_name":"Cubic feet per second", "latest_time":"2026-04-14T15:00:00Z", "latest_value":0.0, "delta24h":null, "sort_order":7, "results":null }, { "tsid":"Carbon Canyon.Stor.Inst.0.0.Rescal", "label":"Flood Storage", "base_parameter":"Stor", "parameter":"Stor", "unit":"ac-ft", "unit_long_name":"Acre-feet", "latest_time":"2026-04-14T15:00:00Z", "latest_value":0.0, "delta24h":null, "sort_order":11, "results":null } ], "name":"Carbon Canyon Dam", "hasResopsAverages":"false", "nidId":"CA10017", "nidid":"", "levels":[ { "slug":"elev.bottom of flood control", "label":"Bottom of Flood Control", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Carbon Canyon.Elev.Inst.0.Bottom of Flood Control", "latest_value":419, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.streambed", "label":"Streambed", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Carbon Canyon.Elev.Inst.0.Streambed", "latest_value":403, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of dam", "label":"Top of Dam", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Carbon Canyon.Elev.Inst.0.Top of Dam", "latest_value":499, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of debris pool", "label":"Top of Debris Pool", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Carbon Canyon.Elev.Inst.0.Top of Debris Pool", "latest_value":419, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of flood", "label":"Top of Flood", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Carbon Canyon.Elev.Inst.0.Top of Flood", "latest_value":475, "units":"ft", "units_long_name":"Feet" }, { "slug":"stor.bottom of flood control", "label":"Bottom of Flood Control", "parameter":"Stor", "base_parameter":"Stor", "tsid":"Carbon Canyon.Stor.Inst.0.Bottom of Flood Control", "latest_value":19, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.streambed", "label":"Streambed", "parameter":"Stor", "base_parameter":"Stor", "tsid":"Carbon Canyon.Stor.Inst.0.Streambed", "latest_value":0, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of dam", "label":"Top of Dam", "parameter":"Stor", "base_parameter":"Stor", "tsid":"Carbon Canyon.Stor.Inst.0.Top of Dam", "latest_value":12914, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of debris pool", "label":"Top of Debris Pool", "parameter":"Stor", "base_parameter":"Stor", "tsid":"Carbon Canyon.Stor.Inst.0.Top of Debris Pool", "latest_value":19, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of flood", "label":"Top of Flood", "parameter":"Stor", "base_parameter":"Stor", "tsid":"Carbon Canyon.Stor.Inst.0.Top of Flood", "latest_value":6310, "units":"ac-ft", "units_long_name":"Acre-feet" } ], "id":549824, "associatedStructuresCount":0, "conditionAssessDate":null, "conditionAssessDetail":null, "conditionAssessId":6, "damHeight":99, "damLength":2610, "distance":null, "drainageArea":19, "eapId":1, "dsacAssignedDate":"2020-11-12T12:00:00.000Z", "eapMeetsGuidelinesId":1, "emergencyContactsUpdated":"2025-04-22T12:00:00.000Z", "eapLastRevDate":"2020-05-28T12:00:00.000Z", "enforcementAuthorityId":0, "federalId":"CA10017", "oldFederalId":"CA10017", "hazardId":4, "hydraulicHeight":92, "inspectionAuthorityId":0, "inspectionDate":"2022-06-14T12:00:00.000Z", "inspectionFrequency":5, "jurisdictionAuthorityId":0, "latitude":33.914578099, "lengthOfLocks":0, "secondaryLengthOfLocks":null, "longitude":-117.840062769, "maxDischarge":36800, "maxStorage":12063, "nidHeight":99, "nidStorage":12063, "normalStorage":0, "numberOfLocks":0, "operationalStatusDate":"2020-11-12T12:00:00.000Z", "operationalStatusId":2, "originalDesignerName":null, "otherStructureId":null, "permittingAuthorityId":0, "politicalPartyId":null, "privateDamId":null, "projectDescription":"Carbon Canyon dam was constructed by the U.S. Army Corps of Engineers (USACE) to provide flood risk management in the Carbon Canyon Creek drainage basin. Construction of the dam was completed in 1961. The dam is located on Carbon Canyon Creek in the city of Brea, California adjacent to the boundary with Yorba Linda, California in northern Orange County. Carbon Canyon Creek flows in a generally southwestern direction onto the coastal Orange County Plain, joining Coyote Creek before flowing into the San Gabriel River. The project includes an earthen embankment and adjoining earthen saddle dike, a detached uncontrolled spillway, and an outlet works that includes a conduit, control tower, and hydraulic gates operated to control releases during high water events. The earthen embankment has a top of dam length of 1,860 feet and a height of 69 feet above streambed.", "riskCharSummary":"The USACE conducted a dam safety risk assessment of the Carbon Canyon Dam that was completed in 2020 and classified the dam as high risk. The combination of life or economic consequences with the likelihood of failure is high and USACE considers this level of life-risk to be unacceptable except in extraordinary circumstances. The assessment identified the potential for internal erosion of the embankment along the outlet conduit and along the wastewater line in the dam to be the primary factors driving the risk. Seismic concerns with impacts from earthquakes were evaluated and determined to not contribute to the risk. The primary consequence centers downstream are Brea, Yorba Linda, Fullerton, Placentia, and Anaheim, California. The population at risk due to a dam failure would be approximately 100,000 in these communities, and significant economic consequences would be expected if a failure were to occur.", "riskManagementMeasures":"To ensure USACE is taking all steps to reduce the risk to the public, USACE will continue to work closely with state and local emergency managers, conducting emergency exercises and incorporating any new information into our Emergency Action Plan. USACE closely follows rainfall forecasts to determine when high water events may occur to provide information for any necessary flood warnings. USACE is working with local communities to provide opportunities to engage with residents and schools to help them understand how they can better prepare for a flood. All dam safety staff are regularly trained to monitor and evaluate the condition of the dam based on key risk components. USACE regularly inspects and monitors instruments to check the health of the dam and increase this monitoring during lake level rises. This ensures that the structure is performing as designed and could help detect any areas of potential concern. Regular maintenance and repairs are performed as needed to keep the dam functioning properly. Future risk communication activities include updates to the Emergency Action Plan and coordinating these plans first responders and development of a formal Risk Communication Plan. USACE has also recommended initiation of a Dam Safety Modification Study to develop alternatives to address the potential for erosion along the conduit and wastewater line.", "riverName":"CARBON CANYON CREEK", "separateStructuresCount":0, "sourceAgency":"US Army Corps of Engineers", "spillwayTypeId":3, "spillwayWidth":125, "stateFedId":"CA10017", "stateRegulatoryAgency":null, "stateRegulatedId":0, "structuralHeight":null, "submitDate":"2023-02-16T17:25:18.161Z", "surfaceArea":1, "volume":0, "widthOfLocks":0, "secondaryWidthOfLocks":null, "yearCompleted":1961, "congDist":"Congressional District 40, California", "city":"PLACENTIA", "county":"Orange", "aiannh":null, "websiteUrl":"https://www.usace.army.mil/Missions/Civil-Works/Dam-Safety-Program/Article/2870967/dam-safety-program/", "coreTypeIds":null, "damTypeIds":"8", "fedConstructionIds":"1", "fedDesignIds":"1", "fedFundingIds":"1", "fedInspectionIds":"1", "fedOperationIds":"1", "fedOtherIds":"1", "fedOwnerIds":"1", "fedRegulatoryIds":"1", "formerNames":null, "foundationTypeIds":null, "nonFederalDamOnFederalId":0, "designerNames":"CESPL", "otherNames":"Carbon Canyon Reservoir", "ownerNames":"USACE - Los Angeles District", "ownerTypeIds":"3", "primaryDamTypeId":8, "primaryOwnerTypeId":3, "primaryPurposeId":9, "purposeIds":"9;5", "dsacId":2, "femaRegion":"9", "lastEapExcerDate":"2024-07-31T12:00:00.000Z", "dataUpdated":"2025-04-23T12:00:00.000Z", "usaceDistrict":"Los Angeles District", "noConsequencesId":0, "secretaryAgricultureBuiltId":null, "nrcsWatershedAuthorizationId":null, "isAssociatedStructureId":"No", "fedRegulatedId":"Yes", "inundationNidAddedId":1, "damStatusId":2, "huc06":"180701", "doi_region":"LCB", "doi_region_name":"Lower Colorado Basin", "doi_region_number":8 }, "id":299145, "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/299145?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/299145?f=jsonld" }, { "rel":"alternate", "type":"text/html", "title":"This document as HTML", "href":"https://api.wwdh.internetofwater.app/collections/usace-edr/items/299145?f=html" }, { "rel":"collection", "type":"application/json", "title":"USACE Access2Water API", "href":"https://api.wwdh.internetofwater.app/collections/usace-edr" } ] }