US Army Corps of Engineers, Walla Walla District. Project Partner, Confederated Tribes of the Umatilla Indian Reservation
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Goals for Mainstem Walla Walla
Priority Target Flow Timing Acre-Feet
(Incremental)		 Acre-Feet
(Cumulative)
1 150 cfs Spring thru June 15,000 15,000
2 50 cfs July thru October 6,000 21,000
3 100 cfs July thru October 12,000 33,000

Goals for Mainstem Walla Walla
  • March-May = 200 cfs
  • June = 150 cfs
  • July = 60 cfs
  • August-September = 50 cfs

Flow Goals
Assumptions/background information:
  • If the amount of flow naturally in the river would be less than the goal (say for example in a drought year), flows would not be augmented above that naturally occurring flow.
  • Flows added to the stream by this project would be “protected” as instream flow and are not able to be withdrawn from the river.
  • Flows generated from HCP process will be added to these figures, creating even more instream flow.
  • Goals can be met through multiple options chosen for implementation.
  • These flow goals will be subject to revision until the Feasibility Report/Environmental Impact Statement (FR/EIS) is published for this effort.
Mainstem Walla Walla
  • Assumes 25 cfs of instream flow will be present from civil penalty agreement.
  • Flow goal is desired from the Cemetery Bridge diversion in Milton-Freewater, Oregon down to the mouth of the Touchet River (additional flows from the Touchet River would then make this figure higher downstream).
  • We are planning on a loss of 50 cfs from the Cemetery Bridge downstream to the Stateline area, do to water seepage into the shallow aquifer. So to meet the first priority, you actually have to begin with 200 cfs at Cemetery Bridge.
Touchet River
  • Flow will be measured at mouth, or at Touchet River @ Cummins Road gauge (#32B075) on the river (assuming there are no diversions downstream)
QUESTIONS
TO MAKE THE GOALS COMPARABLE , AT WHAT POINT ON THE TOUCHET DO YOU SAY THESE FLOWS WOULD START?
FOR TOUCHET RIVER, DO WE REALLY WANT AN INSTREAM GOAL FOR JULY AND AUGUST?? WATER MAY BE REAL HOT, SO DOES IT MATTER???
TOUCHET GOALS ARE EVEN HIGHER THAN MAINSTEM WALLA WALLA AT CERTAIN TIMES OF THE YEAR; SHOULDN’T THIS BE REDUCED???? TOUCHET NATRUALLY CARRIES LESS WATER THAN MAINSTEM.
DO YOU WANT TO ADD ANY TEMPERATURE GOALS TO THESE CHARTS???
DO WE WANT TO PUT A MAP WITH THESE FIGURES IN THE WEB SITE??? HIGHLIGHT THE CHOSEN RIVER REACHES?????