# San Juan-Chama Project. The page title and most references use this name; the authorization-history paragraph instead says “San Juan-Cha Project,” an unresolved source-text discrepancy. Publisher: CapexCue Canonical dossier: Dossier reference: release 1 (a9322ece-4c9a-4bb0-86e8-3f3f39212c80) Released project intelligence Oldest supporting observation: 2026-10-02T19:26:53.118723+00:00 Dossier released: 2026-10-16T15:44:09.754526+00:00 Source report dates and capture dates are listed per fact below; neither establishes an event date. ## Project summary The San Juan-Chama Project is described as a transmountain water-diversion system moving water from upper tributaries of the San Juan River toward the Rio Grande Basin. Its listed works include diversion structures, conduits, siphons and tunnels, with imported water reaching Heron Reservoir. The page places the project in Colorado and New Mexico, in the Upper Colorado Basin Region. It reports an average annual diversion of about 89,800 acre-feet to the Rio Grande Basin for 1991–2020 and describes Heron Reservoir as operated by Reclamation; this does not establish a current works program. The page also reports fish-and-wildlife bypass requirements and recurring mechanical sediment removal at the diversion dams. ## Evidence limits and unknowns - The supplied page does not establish a current construction or upgrade program, current procurement package, budget, investment amount, or next milestone; its construction history describes historical awards and completions. - The page gives Oso Tunnel capacities of 650 cubic feet per second in the collection-system description and 550 cubic feet per second in its overview table; it does not reconcile them. - The page does not date its statement that Heron Reservoir is operated by Reclamation. Current purchasing availability: unknown. Source-dated plans do not establish current progress or available supplier packages. ## Project metadata Country: United States Region: North America Physical assets: Not classified 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. An inter-basin system conveying water from upper tributaries of the San Juan River toward the Rio Grande Basin. The described collection system includes diversion dams, feeder conduits, siphons and tunnels, with imported water flowing down Azotea and Willow Creeks to Heron Reservoir. The project description also includes Heron Dam and Reservoir, the Pojoaque Tributary Unit with Nambe Falls Dam and Reservoir, and enlargement of the existing El Vado Dam outlet works to pass Heron releases. The source gives conflicting Oso Tunnel capacities: 650 cubic feet per second in the collection-system description and 550 cubic feet per second in its overview table; it does not resolve the discrepancy. Source: US Bureau of Reclamation screened government project narrative — https://www.usbr.gov/projects/index.php?id=521 | published unknown | observed 2026-10-02T19:26:53.118723+00:00 Project overview Oldest decisive evidence: 2026-10-02T19:26:53.118723+00:00 Newest evidence: 2026-10-02T19:26:53.118723+00:00 Knowledge reviewed: 2026-10-16T15:44:09.402760+00:00 Publication reviewed: 2026-10-16T15:44:09.402760+00:00 ## Name San Juan-Chama Project. The page title and most references use this name; the authorization-history paragraph instead says “San Juan-Cha Project,” an unresolved source-text discrepancy. 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=521 | published unknown | observed 2026-10-02T19:26:53.118723+00:00 ## Scope An inter-basin system conveying water from upper tributaries of the San Juan River toward the Rio Grande Basin. The described collection system includes diversion dams, feeder conduits, siphons and tunnels, with imported water flowing down Azotea and Willow Creeks to Heron Reservoir. The project description also includes Heron Dam and Reservoir, the Pojoaque Tributary Unit with Nambe Falls Dam and Reservoir, and enlargement of the existing El Vado Dam outlet works to pass Heron releases. The source gives conflicting Oso Tunnel capacities: 650 cubic feet per second in the collection-system description and 550 cubic feet per second in its overview table; it does not resolve the discrepancy. 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=521 | published unknown | observed 2026-10-02T19:26:53.118723+00:00 ## Ecology The project is authorized to provide incidental recreation and fish-and-wildlife benefits. Each diversion dam has a minimum fish-and-wildlife bypass requirement before diversion, and the page reports recurring mechanical removal of significant sediment buildup at each diversion dam. 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=521 | published unknown | observed 2026-10-02T19:26:53.118723+00:00 ## Activity The page reports an average annual diversion of about 89,800 acre-feet to the Rio Grande Basin for 1991–2020 and describes Heron Reservoir as operated by Reclamation. The undated operation statement does not establish present-day construction or a current works program. 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=521 | published unknown | observed 2026-10-02T19:26:53.118723+00:00 ## Location The page identifies Colorado and New Mexico, the Upper Colorado Basin Region, source waters in the San Juan River Basin, and conveyance to the Rio Grande Basin. It does not give a more precise location for the whole project. 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=521 | published unknown | observed 2026-10-02T19:26:53.118723+00:00 ## Cite this dossier CapexCue — San Juan-Chama Project. The page title and most references use this name; the authorization-history paragraph instead says “San Juan-Cha Project,” an unresolved source-text discrepancy. — dossier released 2026-10-16T15:44:09.754526+00:00, release 1 (a9322ece-4c9a-4bb0-86e8-3f3f39212c80) — https://capexcue.com/projects/san-juan-chama-project-the-page-title-and-most-references-use-this-name-the-authorization-history-paragraph-instead-says-san-cdd33217abcbed2d/. For current information and later dossier updates, visit . This file records the release identified above; the current dossier may change.