528 



3. 5. A. 2 Establishes conmittee to coordinate analyses related 

 (page 32) to Snake River reservoir drawdowns (Interim report due 

 11/1/92; final report due 11/1/93) (Council lead). 



Snake River Reservoir Drawdown Committee fSRRDC) 



Background: Reclamation is participating in meetings of the SRRDC. A 

 contractor has been selected (Harza Engineering) to assist the committee in 

 overseeing development of the drawdown plans and reviewing existing 

 information related to drawdown. The committe-? is presently reviewing 

 material being developed by the Corps in their System Configuration Study 

 (SCS). 



Recent Activity: The SRRDC met August 10 to discuss the Corps' SCS study, a 

 proposed biological drawdown test for the lower Snake River, drawdown of John 

 Day Reservoir, and Reclamation's storage appraisal study. The Corps' schedule 

 for completion of the Phase I report for their SCS study has slipped about 

 6 months to March 1994. The Corps and NMFS are preparing a draft EIS on a 

 proposed biological test involving a 43-foot drawdown of Lower Granite 

 Reservoir. The draft EIS should be completed by November 1993. Drawdown of 

 John Day Reservoir to minimum operating pool would achieve decreased water 

 particle travel times of 0.4 to 1.8 days; to achieve similar results from flow 

 augmentation would require as much as 4.5 MAP of additional water. 

 Reclamation's storage appraisal study is on schedule (see measure 3.6.B.1). 



System Configuration Study Technical Advisory Group fSCSTAG^ 



Background: Reclamation is participating on the SCSTAG which was established 

 by the Corps to assist them in the formulation and evaluation of system 

 modification and drawdown alternatives being considered in their SCS. 

 Alternatives to be evaluated range from reservoir drawdowns and system 

 improvements to new upstream storage, an upstream collection facility, and a 

 migratory canal . 



Recent Activity: SCSTAG did not meet during July or August. The Corps is 

 presently re-evaluating system and drawdown alternatives in consideration of 

 comments received on the Interim Status Report and has started preparation of 

 a draft Phase I report on the SCS study. The draft Phase I report should be 

 completed by March 1994. 



Contacts: Ron McKown (SRRDC), Dan Yribar (SCSTAG) 



3. 3. A. 3 Implement measures to allow irrigation at lower 

 (page 33) reservoir levels at John Day Reservoir (Report due 

 11/1/92) (Corps lead). 



Background: Reclamation is participating with the Corps, BPA, and local 

 interests in a study of potential measures to allow operation of John Day 

 Reservoir at minimum operating pool without adversely impacting existing 

 irrigators. Measures being studied include: (1) modification and possible 

 relocation of existing pumping stations, and (2) construction of canals along 

 each side of the reservoir. Reclamation's role in the study will be to 

 provide technical review of the layout, design, and cost estimates of the pump 

 station modifications and canal alternatives. The Corps has contracted with a 



