{ "bbox":null, "type":"Feature", "geometry":{ "bbox":null, "type":"Point", "coordinates":[ -104.71833, 33.27783 ] }, "properties":{ "provider":"SPA", "code":"Two Rivers", "slug":"two%20rivers", "elevation":4054.0, "horizontal_datum":"WGS84", "vertical_datum":"NGVD29", "state":"NM", "kind":"PROJECT", "nearest_city":"Roswell, NM", "public_name":"Two Rivers Dam (Dia A & Rocky)", "location_code":10642043, "nsid":null, "aliases":{ "NIDID":"NM00004", "CWMS Standard Naming":"Two Rivers", "CWMS Legacy Naming":"Two Rivers", "NWS Handbook 5 ID":"TRDN5", "DCP Platform ID":"CE06D474" }, "timeseries":[ { "tsid":"Two Rivers.Precip.Total.~1Day.1Day.MRS", "label":"Precipitation", "base_parameter":"Precip", "parameter":"Precip", "unit":"in", "unit_long_name":"Inches", "latest_time":"2026-04-14T14:00:00Z", "latest_value":0.0, "delta24h":null, "sort_order":16, "results":null }, { "tsid":"Two Rivers.Elev.Inst.~1Hour.0.MRS", "label":"Elevation", "base_parameter":"Elev", "parameter":"Elev", "unit":"ft", "unit_long_name":"Feet", "latest_time":"2026-04-14T14:00:00Z", "latest_value":3957.0, "delta24h":null, "sort_order":1, "results":null }, { "tsid":"Two Rivers.Flow.Ave.~1Day.1Day.MRS", "label":"Outflow", "base_parameter":"Flow", "parameter":"Flow", "unit":"cfs", "unit_long_name":"Cubic feet per second", "latest_time":"2026-04-14T06:00:00Z", "latest_value":0.0, "delta24h":null, "sort_order":7, "results":null }, { "tsid":"Two Rivers.Stor.Inst.~1Day.0.MRS", "label":"Flood Storage", "base_parameter":"Stor", "parameter":"Stor", "unit":"ac-ft", "unit_long_name":"Acre-feet", "latest_time":"2026-04-14T06:00:00Z", "latest_value":0.0, "delta24h":null, "sort_order":11, "results":null }, { "tsid":"Two Rivers.Flow-Res In.Ave.~1Day.1Day.MRS", "label":"Inflow", "base_parameter":"Flow", "parameter":"Flow-Res In", "unit":"cfs", "unit_long_name":"Cubic feet per second", "latest_time":"2026-04-14T06:00:00Z", "latest_value":0.0, "delta24h":null, "sort_order":6, "results":null } ], "name":"Two Rivers Dam 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Rivers.Elev.Inst.0.Top of Flood", "latest_value":4032, "units":"ft", "units_long_name":"Feet" }, { "slug":"stor.bottom of conservation", "label":"Bottom of Conservation", "parameter":"Stor", "base_parameter":"Stor", "tsid":"Two Rivers.Stor.Inst.0.Bottom of Conservation", "latest_value":0, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.bottom of flood", "label":"Bottom of Flood", "parameter":"Stor", "base_parameter":"Stor", "tsid":"Two Rivers.Stor.Inst.0.Bottom of Flood", "latest_value":0, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.bottom of flood control", "label":"Bottom of Flood Control", "parameter":"Stor", "base_parameter":"Stor", "tsid":"Two Rivers.Stor.Inst.0.Bottom of Flood Control", "latest_value":0, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.bottom of normal", "label":"Bottom of Normal", "parameter":"Stor", "base_parameter":"Stor", "tsid":"Two Rivers.Stor.Inst.0.Bottom of Normal", "latest_value":0, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.maximum pool", "label":"Maximum Pool", "parameter":"Stor", "base_parameter":"Stor", "tsid":"Two Rivers.Stor.Inst.0.Maximum Pool", "latest_value":260319, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.streambed", "label":"Streambed", "parameter":"Stor", "base_parameter":"Stor", "tsid":"Two Rivers.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":"Two Rivers.Stor.Inst.0.Top of Conservation", "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":"Two Rivers.Stor.Inst.0.Top of Dam", "latest_value":294495, "units":"ac-ft", "units_long_name":"Acre-feet" }, { "slug":"stor.top of flood", "label":"Top of Flood", "parameter":"Stor", "base_parameter":"Stor", "tsid":"Two Rivers.Stor.Inst.0.Top of Flood", "latest_value":163775, "units":"ac-ft", "units_long_name":"Acre-feet" } ], "id":550144, "associatedStructuresCount":1, "conditionAssessDate":null, "conditionAssessDetail":null, "conditionAssessId":6, "damHeight":98, "damLength":5920, "distance":14, "drainageArea":1027, "eapId":1, "dsacAssignedDate":"2009-11-19T12:00:00.000Z", "eapMeetsGuidelinesId":1, "emergencyContactsUpdated":"2024-08-27T12:00:00.000Z", "eapLastRevDate":"2024-08-27T12:00:00.000Z", "enforcementAuthorityId":0, "federalId":"NM00004", "oldFederalId":"NM00004", "hazardId":4, "hydraulicHeight":113, "inspectionAuthorityId":0, "inspectionDate":"2021-05-24T12:00:00.000Z", "inspectionFrequency":5, "jurisdictionAuthorityId":0, "latitude":33.298935129, "lengthOfLocks":0, "secondaryLengthOfLocks":null, "longitude":-104.724607213, "maxDischarge":233500, "maxStorage":264400, "nidHeight":118, "nidStorage":264400, "normalStorage":168000, "numberOfLocks":0, "operationalStatusDate":"2009-11-19T12:00:00.000Z", "operationalStatusId":2, "originalDesignerName":null, "otherStructureId":null, "permittingAuthorityId":0, "politicalPartyId":null, "privateDamId":null, "projectDescription":"The Two Rivers Dam project is owned and operated by the Albuquerque District, U.S. Army Corps of Engineers (USACE). The project includes two dams: Diamond A Dam located on the Rio Hondo and Rocky Dam located on Rocky Arroyo \u2013 the two watercourses converge approximately seven miles downstream of the project. The project is in Chaves County, NM, about 20 miles from the Rio Hondo confluence with the Pecos River at the city of Roswell. Construction was completed in 1963 and primary project features include two zoned earthen embankment dams, a gated outlet works in Diamond A Dam to adjust operational water releases into the Rio Hondo; an ungated outlet works in Rocky Dam to pass intermittent flows of Rocky Arroyo; and two spillways to pass much larger, uncontrolled flows during extreme events. During flood events, the Two Rivers Dam project can be operated on its own or in conjunction with other dams to optimize upstream and downstream flood risk reduction in the Pecos River Basin. In addition to the project\u2019s main purpose to provide flood risk reduction, it is also authorized for sediment detention.", "riskCharSummary":"Although the Two Rivers Dam project has successfully reduced flooding, it does not eliminate all flood risk caused by rain downstream of the dam or due to emergency operation of the project. During infrequent emergency operation, larger required releases through the project\u2019s gated outlet works or larger flows passing through the ungated outlet works could surpass downstream river channel capacity and flood low-lying areas along the Rio Hondo and Pecos River to Fort Sumner Lake. Although the progression of events leading to much larger, uncontrolled spillway flows have never occurred, flow through the spillways could greatly surpass downstream channel capacity, flood low-lying areas along the Rio Hondo and Pecos River, and be life-threatening. Flood inundation caused by uncontrolled spillway flows could cause catastrophic downstream damages to residences and infrastructure (including levees) downstream along the Rio Hondo and Pecos River to Brantley Lake. Impacted communities include the cities of Roswell, Midway, Dexter, and Hagerman.\n\nUSACE conducted a risk assessment of the Two Rivers Dam project in 2016. Preliminary assessment results characterize dam breach risk as MODERATE due to the combination of unacceptable life loss consequences and moderate likelihood of a dam breach occurring either during normal operations or as the consequence of an extreme event. Specifically, the occurrence of dam breach caused by foundation solutioning accompanied by erosion or collapse of either Diamond A or Rocky Dam was identified as the consequence of an extreme storm event (1 in 22,000 year or 0.0045% per year). The annual probability of dam breach due to foundation solutioning scenarios caused by an extreme event is estimated to be moderate (1 in 10,000) or less. However, if a dam breach were to occur, flood inundation would be life-threatening and cause catastrophic downstream damages to residences and infrastructure (including levees) downstream along the Rio Hondo and Pecos River to Brantley Lake. Impacted communities include the cities of Roswell, Midway, Dexter, and Hagerman.", "riskManagementMeasures":"USACE strives to manage risk through application of several measures including inspections and instrument evaluations, assessments and studies, maintenance activities, and risk communication. Routine inspections and instrument evaluation are performed to monitor performance of the project. Special inspections or increased inspection frequency occurs during high pools, spillway flows, or in response to earthquakes or signs of distress. Comprehensive inspections occur annually, with more detailed inspections taking place every 5 years. Assessments occur every 10 years to compare original design and construction methods to modern standards. Maintenance is routinely performed at the project and recent activities included minor erosion repairs and road grading, vegetation removal from the embankments and upstream reservoir area; and debris removal from the trash racks to allow unobstructed flow through the conduit during both routine and high flow events. A building was recently constructed on Diamond A Dam to protect electrical and mechanical equipment and gate painting has been recommended. Future risk communication activities include revisions to the Emergency Action Plan (EAP) and development of a formal risk communication plan. Flood warnings to notify affected communities downstream of the project are coordinated with external entities.", "riverName":"RIO HONDO & ROCKY ARROYO", "separateStructuresCount":1, "sourceAgency":"US Army Corps of Engineers", "spillwayTypeId":3, "spillwayWidth":1850, "stateFedId":"NM00004", "stateRegulatoryAgency":null, "stateRegulatedId":0, "structuralHeight":118, "submitDate":"2023-02-16T00:00:00.000Z", "surfaceArea":1, "volume":0, "widthOfLocks":0, "secondaryWidthOfLocks":null, "yearCompleted":1963, "congDist":"Congressional District 03, New Mexico", "city":"ROSWELL", "county":"Chaves", "aiannh":null, "websiteUrl":"https://www.spa.usace.army.mil/Missions/Civil-Works/Recreation/Two-Rivers-Dam/", "coreTypeIds":"3", "damTypeIds":"8", "fedConstructionIds":"1", "fedDesignIds":"1", "fedFundingIds":"1", "fedInspectionIds":"1", "fedOperationIds":"1", "fedOtherIds":"1", "fedOwnerIds":"1", "fedRegulatoryIds":"1", "formerNames":"Two Rivers Dam (Diamond A & Rocky)", "foundationTypeIds":"3", "nonFederalDamOnFederalId":0, "designerNames":"CESPA", "otherNames":"Two Rivers Reservoir", "ownerNames":"USACE - Albuquerque District", "ownerTypeIds":"3", "primaryDamTypeId":8, "primaryOwnerTypeId":3, "primaryPurposeId":9, "purposeIds":"9;12", "dsacId":3, "femaRegion":"6", "lastEapExcerDate":"2019-03-20T12:00:00.000Z", "dataUpdated":"2025-06-12T12:00:00.000Z", "usaceDistrict":"Albuquerque District", "noConsequencesId":0, "secretaryAgricultureBuiltId":null, "nrcsWatershedAuthorizationId":null, "isAssociatedStructureId":"No", "fedRegulatedId":"Yes", "inundationNidAddedId":1, "damStatusId":2, "huc06":"130600", "doi_region":"UCB", "doi_region_name":"Upper Colorado Basin", "doi_region_number":7 }, "id":10642043, "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/10642043?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/10642043?f=jsonld" }, { "rel":"alternate", "type":"text/html", "title":"This document as HTML", "href":"https://api.wwdh.internetofwater.app/collections/usace-edr/items/10642043?f=html" }, { "rel":"collection", "type":"application/json", "title":"USACE Access2Water API", "href":"https://api.wwdh.internetofwater.app/collections/usace-edr" } ] }