1. Cost and Energy Impacts of Fish and Wildlife Operations NW Power Planning Council April 3, 2002 Boise, Idaho

2. Why are we doing this? To help the Council focus on where best to spend research money. To help prioritize fish and wildlife measures in the event that some may have to be curtailed for power emergencies. To help the Council choose between two or more alternatives that achieve the same biological objectives.

3. What is it? Each component of the fish and wildlife main- stem operation is analyzed separately. Each scenario has one and only one component removed from (or added to) current operations. We observe the average monthly change in generation and the cost for each component.

4. What is it not? A cost/benefit analysis for fish and wildlife measures An integration of fish & wildlife and power planning A balancing of power and fish & wildlife needs

5. Caveats Not all components were examined Components are not independent –The cost of removing two components at the same time is not the same as the sum of the cost of each separately. –Cannot simply add up the cost of all components to get the total cost of current operations.

6. Components of a F&W Operation Flow Augmentation Reservoir Elevation Bypass Spill

7. Flow Augmentation (purpose) To reduce travel time To keep redds under water To reduce water temperature

8. Flow Augmentation (examples) Chum flows at Bonneville (fall and winter) Vernita Bar flows (winter and spring) Summer flow augmentation (Snake and Columbia) Water releases for temperature control in late summer

9. Reservoir Elevation (purpose) Winter fill to store water for flow augmentation Spring-Summer release for flow augmentation Drafting/filling limits for resident fish

10. Reservoir Elevation (examples) Winter fill at Coulee, Libby, Horse and Dworshak VARQ flood control at Libby, Horse and Coulee Integrated Rule Curves at Libby and Horse Coulee retention time operation Summer draft limits at Coulee, Libby, Horse and Dworshak

11. Bypass Spill (purpose) Increase survival past dams Most useful at sites w/o guidance systems Coordinate spill with transportation policy

13. Stable (?) Electricity Prices

15. Highest Cost Components John Day Summer Spill Bonneville Summer Spill The Dalles Summer Spill John Day Spring Spill The Dalles Spring Spill Ice Harbor Spring Spill Ice Harbor Summer Spill Bonneville Spring Spill Lower Monumental Spring Spill

16. Low Cost Components Grand Coulee Winter Fill Lower Granite Spring Spill Libby and Horse Integrated Rule Curves Little Goose Spring Spill Grand Coulee Summer Draft Libby Summer Draft Dworshak Summer Draft McNary July Flow Augmentation Lower Granite July Flow Augmentation McNary Spring Spill

17. No Cost Components Lower Granite August Flow Augmentation –Generally no flow augmentation water is left Upper Snake 427 Kaf Flow Augmentation Libby Winter Fill Dworshak Winter Fill Hungry Horse Winter Fill

18. Revenue Increasing Components McNary August 1-15 Flow Augmentation VarQ Flood Control (Libby, Horse, Coulee) Hungry Horse Summer Draft McNary August 16-31 Flow Augmentation Chum Flows Grand Coulee Retention Time Operation

19. Cost of Spill Changes with Flow When bypass spill is a percentage of outflow When flows are above turbine capacity –Forced spill is counted first and does not add to the cost of bypass spill Does not change when the gas supersaturation limit is reached

20. Bypass Spill vs. Outflow (when spill is a percentage of outflow)