{ "bbox":null, "type":"Feature", "geometry":{ "bbox":null, "type":"Point", "coordinates":[ -118.47361, 34.16667 ] }, "properties":{ "provider":"SPL", "code":"Sepulveda", "slug":"sepulveda", "elevation":690.0, "horizontal_datum":"WGS84", "vertical_datum":"NGVD29", "state":"CA", "kind":"PROJECT", "nearest_city":"Beverly Hills", "public_name":"Sepulveda Dam", "location_code":905145, "nsid":null, "aliases":{ "NIDID":"CA10025" }, "timeseries":[ { "tsid":"Sepulveda US.Flow.Ave.0.0.Rescal", "label":"Inflow", "base_parameter":"Flow", "parameter":"Flow", "unit":"cfs", "unit_long_name":"Cubic feet per second", "latest_time":"2026-04-14T14:30:00Z", "latest_value":78.0, "delta24h":null, "sort_order":6, "results":null }, { "tsid":"Sepulveda.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":27.18, "delta24h":null, "sort_order":16, "results":null }, { "tsid":"Sepulveda.Elev.Inst.0.0.Rescal", "label":"Elevation", "base_parameter":"Elev", "parameter":"Elev", "unit":"ft", "unit_long_name":"Feet", "latest_time":"2026-04-14T14:30:00Z", "latest_value":668.4, "delta24h":null, "sort_order":1, "results":null }, { "tsid":"Sepulveda.Flow.Inst.0.0.Rescal", "label":"Outflow", "base_parameter":"Flow", "parameter":"Flow", "unit":"cfs", "unit_long_name":"Cubic feet per second", "latest_time":"2026-04-14T14:30:00Z", "latest_value":78.0, "delta24h":null, "sort_order":7, "results":null }, { "tsid":"Sepulveda.Stor.Inst.0.0.Rescal", "label":"Flood Storage", "base_parameter":"Stor", "parameter":"Stor", "unit":"ac-ft", "unit_long_name":"Acre-feet", "latest_time":"2026-04-14T14:30:00Z", "latest_value":0.0, "delta24h":null, "sort_order":11, "results":null } ], "name":"Sepulveda Dam", "hasResopsAverages":"false", "nidId":"CA10025", "nidid":"", "levels":[ { "slug":"elev.bottom of flood", "label":"Bottom of Flood", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Sepulveda.Elev.Inst.0.Bottom of Flood", "latest_value":668, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.streambed", "label":"Streambed", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Sepulveda.Elev.Inst.0.Streambed", "latest_value":668, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of dam", "label":"Top of Dam", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Sepulveda.Elev.Inst.0.Top of Dam", "latest_value":725, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of flood", "label":"Top of Flood", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Sepulveda.Elev.Inst.0.Top of Flood", "latest_value":710, "units":"ft", "units_long_name":"Feet" }, { "slug":"stor.bottom of flood", "label":"Bottom of Flood", "parameter":"Stor", "base_parameter":"Stor", "tsid":"Sepulveda.Stor.Inst.0.Bottom of Flood", "latest_value":0, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.streambed", "label":"Streambed", "parameter":"Stor", "base_parameter":"Stor", "tsid":"Sepulveda.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":"Sepulveda.Stor.Inst.0.Top of Dam", "latest_value":46764, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of flood", "label":"Top of Flood", "parameter":"Stor", "base_parameter":"Stor", "tsid":"Sepulveda.Stor.Inst.0.Top of Flood", "latest_value":18129, "units":"ac-ft", "units_long_name":"Acre-feet" } ], "id":549750, "associatedStructuresCount":0, "conditionAssessDate":null, "conditionAssessDetail":null, "conditionAssessId":6, "damHeight":57, "damLength":15440, "distance":null, "drainageArea":152, "eapId":1, "dsacAssignedDate":"2017-05-19T12:00:00.000Z", "eapMeetsGuidelinesId":1, "emergencyContactsUpdated":"2025-04-22T12:00:00.000Z", "eapLastRevDate":"2019-10-31T12:00:00.000Z", "enforcementAuthorityId":0, "federalId":"CA10025", "oldFederalId":"CA10025", "hazardId":4, "hydraulicHeight":49, "inspectionAuthorityId":0, "inspectionDate":"2023-05-25T12:00:00.000Z", "inspectionFrequency":5, "jurisdictionAuthorityId":0, "latitude":34.167963016, "lengthOfLocks":0, "secondaryLengthOfLocks":null, "longitude":-118.471773398, "maxDischarge":99540, "maxStorage":27563, "nidHeight":57, "nidStorage":27563, "normalStorage":0, "numberOfLocks":0, "operationalStatusDate":"2017-05-19T12:00:00.000Z", "operationalStatusId":2, "originalDesignerName":null, "otherStructureId":null, "permittingAuthorityId":0, "politicalPartyId":null, "privateDamId":null, "projectDescription":"Sepulveda Dam is located on the Los Angeles River in the Cities of Encino and Van Nuys, County of Los Angeles, California. It was authorized to provide flood risk management for the downstream communities and construction was completed by the U.S. Army Corps of Engineers (USACE) in December 1941. The project is located on the Los Angeles River at the junction of the San Diego(I-405) and Ventura (US-101) freeways. It is the western most project of those projects making up the Los Angeles County Drainage Area flood control system. The dam consists of an embankment, outlet works, and concrete spillway that has hydrostatically operated, submersible drum gates. The purpose of the project is to collect storm runoff from the uncontrolled drainage areas upstream, store it temporarily, and then release to the Los Angeles River at a rate that does not exceed the downstream channel capacity, thus providing the flood damage reduction it was authorized to provide. The dam is an earth-fill structure with a top of dam length of 15,440 feet and a height of 57 feet above the streambed. The dam has two methods for releasing water: 1) an outlet works consisting of four gated and four ungated conduits that pass through the dam, 2) spillway with seven automatically/or manually controlled gates.", "riskCharSummary":"A risk assessment of the Sepulveda Dam was completed by USACE in 2017. The risks identified during this study determined the dam to be a moderate risk due to the combination of life, economic, or environmental consequences with likelihood of failure to be unacceptable except in unusual circumstances. The main factors driving the risk of Sepulveda Dam are erosion of the earthen embankment foundation and mechanical failure of the spillway gates. The primary consequence locations are Van Nuys, Sherman Oaks and Studio City, California with the population at risk between 576,000 and 640,000. Economic consequences were estimated to be more than $12 billion.", "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.", "riverName":"LOS ANGELES RIVER", "separateStructuresCount":0, "sourceAgency":"US Army Corps of Engineers", "spillwayTypeId":1, "spillwayWidth":399, "stateFedId":"CA10025", "stateRegulatoryAgency":null, "stateRegulatedId":0, "structuralHeight":null, "submitDate":"2023-02-16T17:25:16.205Z", "surfaceArea":1, "volume":0, "widthOfLocks":0, "secondaryWidthOfLocks":null, "yearCompleted":1941, "congDist":"Congressional District 32, California", "city":"LOS ANGELES", "county":"Los Angeles", "aiannh":null, "websiteUrl":"https://www.spl.usace.army.mil/Missions/Asset-Management/Sepulveda-Dam/", "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":"Sepulveda Reservoir", "ownerNames":"USACE - Los Angeles District", "ownerTypeIds":"3", "primaryDamTypeId":8, "primaryOwnerTypeId":3, "primaryPurposeId":9, "purposeIds":"9;5", "dsacId":3, "femaRegion":"9", "lastEapExcerDate":"2020-08-13T12:00:00.000Z", "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":905145, "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/905145?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/905145?f=jsonld" }, { "rel":"alternate", "type":"text/html", "title":"This document as HTML", "href":"https://api.wwdh.internetofwater.app/collections/usace-edr/items/905145?f=html" }, { "rel":"collection", "type":"application/json", "title":"USACE Access2Water API", "href":"https://api.wwdh.internetofwater.app/collections/usace-edr" } ] }