From email from Reclamation (Susan Novak Behery):
The City of Farmington Hydroelectric Power Plant will be taken offline today, Tuesday, August 17th, at 1:00 PM for unscheduled work. The Bureau of Reclamation will open the Auxiliary 4×4 release at that time, to 700 cubic feet per second (cfs) (a reduction from the current release of 800 cfs). The Auxiliary will continue releasing for a period of up to a week while work continues at the Power Plant.
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.