# CRBSCP - Desalting Complex Unit - Title I Publisher: CapexCue Canonical dossier: Dossier reference: release 1 (ec1a858c-282b-4dfc-8ca6-33068e4eea65) Released project intelligence Oldest supporting observation: 2026-10-03T05:19:07.182151+00:00 Dossier released: 2026-10-16T14:18:02.694743+00:00 Source report dates and capture dates are listed per fact below; neither establishes an event date. ## Project summary CRBSCP - Desalting Complex Unit - Title I is described as a combination of structural works and nonstructural measures across southwestern Arizona and northwestern Sonora, Mexico. The plant site is about four miles west of Yuma, Arizona. The physical scope includes a reverse-osmosis desalting plant, a concrete-lined bypass drain to Santa Clara Slough, a buried siphon, and associated facilities. The account also describes irrigation-efficiency and acreage-reduction measures and habitat mitigation. Its water-treatment and delivery figures are plan estimates, not verified operating results. The account reports plant construction began in 1980 and says the remaining pretreatment facilities were scheduled for completion in 1984; it does not establish present condition or operation. ## Evidence limits and unknowns - The account does not establish the present condition or operating status of the plant and other works; it reports a 1984 schedule for remaining pretreatment facilities without confirming the outcome. - The final sludge-disposal site and implementation status are not established. Pilot Knob is described as proposed and under negotiation, with an interim alternative site also mentioned. - The historical contract award and project plans do not establish a current procurement opportunity or schedule. Current purchasing availability: unknown. Source-dated plans do not establish current progress or available supplier packages. ## Project metadata Country: Mexico, United States Region: Latin America Caribbean, North America Physical assets: Desalination Derived from the exact released evidence; unresolved fields remain unclassified. ## Project category Water and environment Derived from the reviewed scope statement; delivery stage remains unclassified. The unit combines structural works and nonstructural measures. Its principal physical works include the Yuma reverse-osmosis desalting plant; a 53-mile concrete-lined bypass drain carrying reject water from the plant via the MODE toward Santa Clara Slough in Mexico; a buried reinforced-concrete siphon replacing a MODE flume section; and associated access, power, water-supply, sewage-treatment, and energy-recovery facilities. Other measures include Wellton-Mohawk irrigation-efficiency improvements and acreage reduction, fish and wildlife mitigation, and a Painted Rock Reservoir land-acquisition and operating-schedule measure. The source describes the sludge-disposal facilities as being in advance planning; Pilot Knob in Imperial County was proposed and under negotiation, while an interim alternative site was also described. The Painted Rock land measure is materially qualified by the source-era account: the Corps said it lacked legal authority to purchase the lands and that purchase would not change its release plan. This does not establish the measure’s present status. Source: US Bureau of Reclamation screened government project narrative — https://www.usbr.gov/projects/index.php?id=478 | published unknown | observed 2026-10-03T05:19:07.182151+00:00 Project overview Oldest decisive evidence: 2026-10-03T05:19:07.182151+00:00 Newest evidence: 2026-10-03T05:19:07.182151+00:00 Knowledge reviewed: 2026-10-16T14:18:02.220749+00:00 Publication reviewed: 2026-10-16T14:18:02.220749+00:00 ## Name CRBSCP - Desalting Complex Unit - Title I Status: reported Attribution: US Bureau of Reclamation own-government project narrative Source: US Bureau of Reclamation screened government project narrative — https://www.usbr.gov/projects/index.php?id=478 | published unknown | observed 2026-10-03T05:19:07.182151+00:00 ## Scope The unit combines structural works and nonstructural measures. Its principal physical works include the Yuma reverse-osmosis desalting plant; a 53-mile concrete-lined bypass drain carrying reject water from the plant via the MODE toward Santa Clara Slough in Mexico; a buried reinforced-concrete siphon replacing a MODE flume section; and associated access, power, water-supply, sewage-treatment, and energy-recovery facilities. Other measures include Wellton-Mohawk irrigation-efficiency improvements and acreage reduction, fish and wildlife mitigation, and a Painted Rock Reservoir land-acquisition and operating-schedule measure. The source describes the sludge-disposal facilities as being in advance planning; Pilot Knob in Imperial County was proposed and under negotiation, while an interim alternative site was also described. The Painted Rock land measure is materially qualified by the source-era account: the Corps said it lacked legal authority to purchase the lands and that purchase would not change its release plan. This does not establish the measure’s present status. Status: reported Attribution: US Bureau of Reclamation own-government project narrative Source: US Bureau of Reclamation screened government project narrative — https://www.usbr.gov/projects/index.php?id=478 | published unknown | observed 2026-10-03T05:19:07.182151+00:00 ## Activity The source reports a September 1975 contract award for the MODE siphon and relocation of Yuma’s standby municipal pumping plant; the siphon was completed in June 1976. It reports Mexico’s 37-mile drain segment completed in March 1977, the U.S. segment completed in June 1977, and the drain placed in operation on June 23, 1977. The acreage-reduction measures were reported completed in 1978. Plant construction began in 1980; some pretreatment facilities and the switchyard were reported completed, while completion of the remaining pretreatment facilities was scheduled for 1984. The separate Yuma Desalting Test Facility was used for testing and was reported to have stopped testing in June 1982 and since been disassembled. These are historical statements in an undated account, not evidence of present condition or operation. Status: reported Attribution: US Bureau of Reclamation own-government project narrative Source: US Bureau of Reclamation screened government project narrative — https://www.usbr.gov/projects/index.php?id=478 | published unknown | observed 2026-10-03T05:19:07.182151+00:00 ## Delivery The stated objective is to reduce the quantity and improve the quality of saline Wellton-Mohawk drainage so that more water can be credited toward treaty deliveries. The plan estimates about 97,300 acre-feet of feed water annually, about 68,500 acre-feet of product water and 28,800 acre-feet of reject water, with about 10,100 acre-feet of raw MODE water blended with product water to yield about 78,600 acre-feet annually for return to the Colorado River. The source also describes an intended average salinity 115 parts per million above the salinity of water arriving at Imperial Dam. These are stated objectives and plan estimates, not verified operating results. Status: planned Attribution: US Bureau of Reclamation own-government project narrative Source: US Bureau of Reclamation screened government project narrative — https://www.usbr.gov/projects/index.php?id=478 | published unknown | observed 2026-10-03T05:19:07.182151+00:00 ## Location The unit is described across the lower Gila and Colorado River valleys of southwestern Arizona and northwestern Sonora, Mexico. The plant site is about four miles west of Yuma, Arizona. The drain crosses into Mexico and continues to Santa Clara Slough. Imperial County, California, is mentioned as a proposed—not established final—sludge-disposal location. Status: reported Attribution: US Bureau of Reclamation own-government project narrative Source: US Bureau of Reclamation screened government project narrative — https://www.usbr.gov/projects/index.php?id=478 | published unknown | observed 2026-10-03T05:19:07.182151+00:00 ## Cite this dossier CapexCue — CRBSCP - Desalting Complex Unit - Title I — dossier released 2026-10-16T14:18:02.694743+00:00, release 1 (ec1a858c-282b-4dfc-8ca6-33068e4eea65) — https://capexcue.com/projects/crbscp-desalting-complex-unit-title-i-0117ac242221455b/. For current information and later dossier updates, visit . This file records the release identified above; the current dossier may change.