{ "bbox":null, "type":"Feature", "geometry":{ "bbox":null, "type":"Point", "coordinates":[ -120.11333, 39.32667 ] }, "properties":{ "provider":"SPK", "code":"Martis Creek", "slug":"martis%20creek", "elevation":5858.01, "horizontal_datum":"WGS84", "vertical_datum":"NGVD29", "state":"CA", "kind":"PROJECT", "nearest_city":"", "public_name":"Martis Creek Dam", "location_code":2067324044, "nsid":null, "aliases":{ "NIDID":"CA10108" }, "timeseries":[ { "tsid":"Martis Creek.Flow-Res Out.Ave.1Hour.1Hour.Calc-val", "label":"Outflow", "base_parameter":"Flow", "parameter":"Flow-Res Out", "unit":"cfs", "unit_long_name":"Cubic feet per second", "latest_time":"2026-04-14T23:00:00Z", "latest_value":55.01, "delta24h":null, "sort_order":7, "results":null }, { "tsid":"Martis Creek-Pool.Temp-Air.Inst.1Hour.0.Calc-val", "label":"Air Temperature", "base_parameter":"Temp", "parameter":"Temp-Air", "unit":"F", "unit_long_name":"Fahrenheit", "latest_time":"2026-04-14T22:00:00Z", "latest_value":48.2, "delta24h":null, "sort_order":22, "results":null }, { "tsid":"Martis Creek-Pool.Stor.Inst.1Hour.0.Calc-val", "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":927.0, "delta24h":null, "sort_order":13, "results":null }, { "tsid":"Martis Creek-Pool.Precip-INC.Total.1Hour.1Hour.Calc-val", "label":"Precipitation", "base_parameter":"Precip", "parameter":"Precip-INC", "unit":"in", "unit_long_name":"Inches", "latest_time":"2026-04-14T23:00:00Z", "latest_value":0.0, "delta24h":null, "sort_order":16, "results":null }, { "tsid":"Martis Creek.Flow-Res In.Ave.1Hour.1Hour.Calc-val", "label":"Inflow", "base_parameter":"Flow", "parameter":"Flow-Res In", "unit":"cfs", "unit_long_name":"Cubic feet per second", "latest_time":"2026-04-14T22:00:00Z", "latest_value":55.01, "delta24h":null, "sort_order":6, "results":null }, { "tsid":"Martis Creek-Pool.Stor.Inst.1Hour.0.Calc-val", "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":927.0, "delta24h":null, "sort_order":11, "results":null }, { "tsid":"Martis Creek-Pool.Elev.Inst.1Hour.0.Calc-val", "label":"Elevation", "base_parameter":"Elev", "parameter":"Elev", "unit":"ft", "unit_long_name":"Feet", "latest_time":"2026-04-14T22:00:00Z", "latest_value":5782.29, "delta24h":null, "sort_order":1, "results":null } ], "name":"Martis Creek Dam", "hasResopsAverages":"true", "nidId":"CA10108", "nidid":"", "levels":[ { "slug":"elev.bottom of flood", "label":"Bottom of Flood", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Martis Creek.Elev.Inst.0.Bottom of Flood", "latest_value":5780.4, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.streambed", "label":"Streambed", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Martis Creek.Elev.Inst.0.Streambed", "latest_value":5745, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of conservation", "label":"Top of Conservation", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Martis Creek.Elev.Inst.0.Top of Conservation", "latest_value":5780.4, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of dam", "label":"Top of Dam", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Martis Creek.Elev.Inst.0.Top of Dam", "latest_value":5858, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of flood", "label":"Top of Flood", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Martis Creek.Elev.Inst.0.Top of Flood", "latest_value":5838, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of gross pool", "label":"Top of Gross Pool", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Martis Creek.Elev.Inst.0.Top of Gross Pool", "latest_value":5838, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of inactive", "label":"Top of Inactive", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Martis Creek.Elev.Inst.0.Top of Inactive", "latest_value":5780, "units":"ft", "units_long_name":"Feet" }, { "slug":"elev.top of surcharge", "label":"Top of Surcharge", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Martis Creek.Elev.Inst.0.Top of Surcharge", "latest_value":5852.9, "units":"ft", "units_long_name":"Feet" }, { "slug":"stor.bottom of flood", "label":"Bottom of Flood", "parameter":"Stor", "base_parameter":"Stor", "tsid":"Martis Creek.Stor.Inst.0.Bottom of Flood", "latest_value":null, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.streambed", "label":"Streambed", "parameter":"Stor", "base_parameter":"Stor", "tsid":"Martis Creek.Stor.Inst.0.Streambed", "latest_value":0, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of conservation", "label":"Top of Conservation", "parameter":"Stor", "base_parameter":"Stor", "tsid":"Martis Creek.Stor.Inst.0.Top of Conservation", "latest_value":null, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of dam", "label":"Top of Dam", "parameter":"Stor", "base_parameter":"Stor", "tsid":"Martis Creek.Stor.Inst.0.Top of Dam", "latest_value":40728, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of flood", "label":"Top of Flood", "parameter":"Stor", "base_parameter":"Stor", "tsid":"Martis Creek.Stor.Inst.0.Top of Flood", "latest_value":20400, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of gross pool", "label":"Top of Gross Pool", "parameter":"Stor", "base_parameter":"Stor", "tsid":"Martis Creek.Stor.Inst.0.Top of Gross Pool", "latest_value":20400, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of inactive", "label":"Top of Inactive", "parameter":"Stor", "base_parameter":"Stor", "tsid":"Martis Creek.Stor.Inst.0.Top of Inactive", "latest_value":800, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of surcharge", "label":"Top of Surcharge", "parameter":"Stor", "base_parameter":"Stor", "tsid":"Martis Creek.Stor.Inst.0.Top of Surcharge", "latest_value":34600, "units":"ac-ft", "units_long_name":"Acre-feet" } ], "id":549818, "associatedStructuresCount":0, "conditionAssessDate":null, "conditionAssessDetail":null, "conditionAssessId":6, "damHeight":93, "damLength":2673, "distance":32, "drainageArea":39, "eapId":1, "dsacAssignedDate":"2016-03-23T12:00:00.000Z", "eapMeetsGuidelinesId":1, "emergencyContactsUpdated":"2024-09-30T12:00:00.000Z", "eapLastRevDate":"2024-09-30T12:00:00.000Z", "enforcementAuthorityId":0, "federalId":"CA10108", "oldFederalId":"CA10108", "hazardId":4, "hydraulicHeight":108, "inspectionAuthorityId":0, "inspectionDate":"2021-09-17T12:00:00.000Z", "inspectionFrequency":5, "jurisdictionAuthorityId":0, "latitude":39.3272337080001, "lengthOfLocks":0, "secondaryLengthOfLocks":null, "longitude":-120.114789396, "maxDischarge":4060, "maxStorage":34600, "nidHeight":113, "nidStorage":34600, "normalStorage":22000, "numberOfLocks":0, "operationalStatusDate":"2016-03-23T12:00:00.000Z", "operationalStatusId":2, "originalDesignerName":null, "otherStructureId":null, "permittingAuthorityId":0, "politicalPartyId":null, "privateDamId":null, "projectDescription":"The U.S. Army Corps of Engineers (USACE) built Martis Creek Dam in 1972 as part of the Truckee River and Tributaries Project. Martis Creek Dam is located about 2 miles upstream of Truckee on Martis Creek, a tributary to the Truckee River, in Nevada County, California. Although Martis Creek Dam is located in the State of California, it reduces the frequency of flooding primarily in the Reno-Sparks Metropolitan Area in the state of Nevada, and other small communities, by holding back water during major flood events. Although flood risk management is the project\u2019s primary focus, the dam is also authorized to provide water supply, recreation, and environmental stewardship benefits. The dam structure consists of an earthfill embankment with a concrete spillway that is located to the left of the main dam.", "riskCharSummary":"Martis Creek Dam has a long history of water seeping through the dam since it was constructed. Based on its performance, many modifications were made to the dam between the years 1973-1995 to improve its performance. In 2008, USACE completed a preliminary screening of the dam to understand how it might perform during certain flood scenarios and found the risk of water seeping through the dam and carrying soil particles away from the part of the dam where the embankment meets the natural hillside and causing voids as the soil erodes, as well as overtopping of the dam to be very high. These findings led to an established maximum pool level and a requirement to always leave the gates fully open. Additional studies and risk reduction measures were implemented at the dam. In 2015, a team of engineers performed a more rigorous risk assessment and concluded that although significant quantities of water seeping through the dam have been observed at the project and are expected, it will not lead to erosion of the foundation. In addition, the largest expected flood event is significantly less frequent than originally predicted, so overtopping of the dam is less of a concern. Due to this assessment, the dam is now categorized to have moderate risk. Although overtopping and water seeping through the dam are still a concern for this dam, these scenarios are extremely unlikely. The gates remain fully open, which significantly decreases the risk to downstream communities until a test fill can be completed for Martis Creek Dam, which is currently on hold. In addition, Martis Creek Dam has an emergency action plan to lower the risk of life loss if any of these scenarios occurred.", "riskManagementMeasures":"USACE Sacramento district works closely with local emergency managers, regularly updates the emergency action plan, and conducts emergency exercises with state, federal, and local partners, all of which help reduce risk to the public. USACE has full-time staff members who work at Martis Creek Dam 8 months out of the year, with minimal staff during the winter season. The staff performs regular maintenance and repairs as needed to keep the dam functioning properly and are available 24/7 to perform immediate inspections if an unusual event occurs. Regular inspections and instrument monitoring ensure that the structure is performing as designed and could help detect any areas of potential concern. In most scenarios the downstream communities would have hours, or even days, from a coordinated warning notification before water reaches their homes during a flood event. However, during very large and rare earthquake events, there may be little to no warning.", "riverName":"MARTIS CREEK", "separateStructuresCount":0, "sourceAgency":"US Army Corps of Engineers", "spillwayTypeId":3, "spillwayWidth":25, "stateFedId":"CA10108", "stateRegulatoryAgency":null, "stateRegulatedId":0, "structuralHeight":113, "submitDate":"2023-02-16T17:25:41.836Z", "surfaceArea":768, "volume":0, "widthOfLocks":0, "secondaryWidthOfLocks":null, "yearCompleted":1972, "congDist":"Congressional District 03, California", "city":"RENO", "county":"Nevada", "aiannh":null, "websiteUrl":"https://www.spk.usace.army.mil/Missions/Civil-Works/Martis-Creek-Dam/", "coreTypeIds":"3", "damTypeIds":"8", "fedConstructionIds":"1", "fedDesignIds":"1", "fedFundingIds":"1", "fedInspectionIds":"1", "fedOperationIds":"1", "fedOtherIds":"1", "fedOwnerIds":"1", "fedRegulatoryIds":"1", "formerNames":null, "foundationTypeIds":"3", "nonFederalDamOnFederalId":0, "designerNames":null, "otherNames":"Martis Creek Lake", "ownerNames":"USACE - Sacramento District", "ownerTypeIds":"3", "primaryDamTypeId":8, "primaryOwnerTypeId":3, "primaryPurposeId":9, "purposeIds":"9;5;6", "dsacId":3, "femaRegion":"9", "lastEapExcerDate":"2024-08-13T12:00:00.000Z", "dataUpdated":"2024-10-11T12:00:00.000Z", "usaceDistrict":"Sacramento District", "noConsequencesId":0, "secretaryAgricultureBuiltId":null, "nrcsWatershedAuthorizationId":null, "isAssociatedStructureId":"No", "fedRegulatedId":"Yes", "inundationNidAddedId":1, "damStatusId":2, "huc06":"160501", "doi_region":"CGB", "doi_region_name":"California-Great Basin", "doi_region_number":10, "thirtyYearAverage":1.7114, "tenthPercentile":0.9856, "ninetiethPercentile":1.4248 }, "id":2067324044, "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/2067324044?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/2067324044?f=jsonld" }, { "rel":"alternate", "type":"text/html", "title":"This document as HTML", "href":"https://api.wwdh.internetofwater.app/collections/usace-edr/items/2067324044?f=html" }, { "rel":"collection", "type":"application/json", "title":"USACE Access2Water API", "href":"https://api.wwdh.internetofwater.app/collections/usace-edr" } ] }