# San Juan-Colorado basin streamflow Daily mean discharge across 2 gauges _Data through Aug 26, 2026 · source last checked Aug 27, 2026 · page revised Aug 27, 2026_ > 2 basin-representative gauges tracked. The San Juan River near Archuleta flowed at 969 cfs on Aug 26, while the Farmington gauge read 933 cfs the same day. ## The numbers | Gauge | Discharge | As of | | --- | --- | --- | | San Juan River near Archuleta | 969 cfs | Aug 26, 2026 | | San Juan River at Farmington | 933 cfs | Aug 26, 2026 | ## About San Juan-Colorado basin The San Juan drains the southern San Juan Mountains across Colorado, New Mexico and Utah, and is one of the two large tributaries that fill Lake Powell. This page lines up its two gages: Archuleta, immediately below Navajo Dam, and Farmington, about 40 river miles downstream and below the Animas confluence. The pair separates the managed river from the natural one. Archuleta is a release schedule: a steady baseflow with one engineered spring peak timed for endangered-fish habitat. Farmington adds the Animas, which drains the mountains above Durango with no major storage on it, so the difference between the two lines is close to what the snowpack actually delivered this year. A spring in which Farmington rises sharply while Archuleta stays flat is a good snow year that Reclamation is choosing to store. ## About this data - Source: US Geological Survey (USGS) - Series: Daily mean streamflow (discharge) - Geography: San Juan-Colorado - Unit: cfs - Calculation period: Daily mean - Last observation: Aug 26, 2026 - Update frequency: Daily --- Cite: San Juan-Colorado basin: 969 cfs daily mean discharge as of Aug 26, 2026 (USGS). The Waterline. https://the-waterline.com/streamflow/san-juan-colorado-basin Canonical URL: https://the-waterline.com/streamflow/san-juan-colorado-basin