Navajo Dam operations update: Releases to bump down to 70 cfs September 29, 2021 #SanJuanRiver #ColoradoRiver #COriver #aridification #endangeredspecies

Map of the San Juan River Basin showing tributary sites in the inset maps, relevant endangered fish habitat: Credit: ResearchGate.net

From email from Reclamation (Susan Novak Behery):

In response to increasing flows in the critical habitat reach, the Bureau of Reclamation has scheduled a decrease in the release from Navajo Dam from 850 cubic feet per second (cfs) to 700 cfs today, September 29th, at 1:00 PM. Releases are made for the authorized purposes of the Navajo Unit, and to attempt to maintain a target base flow through the endangered fish critical habitat reach of the San Juan River (Farmington to Lake Powell).

The San Juan River Basin Recovery Implementation Program recommends a target base flow of between 500 cfs and 1,000 cfs through the critical habitat area. The target base flow is calculated as the weekly average of gaged flows throughout the critical habitat area from Farmington to Lake Powell. This release change is calculated to be the minimum release required to maintain the minimum target base flow.

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