1. Dam of the Day Bonneville Dam Duffy Dessalines September 27, 2001

2. Bonneville Dam Location Dam structures at the Columbia River between Oregon and Washington. Dam structures at the Columbia River between Oregon and Washington. On Columbia River about 40 miles upstream from Portland, Oregon On Columbia River about 40 miles upstream from Portland, Oregon

3. Bonneville Dam History Built by the United States Army Corps of Engineers in 1933-1937 Built by the United States Army Corps of Engineers in 1933-1937

4. Bonneville Dam History

9. Bonneville Dam Primary Functions Electrical Power Generation Electrical Power Generation energy production a is over 1 million kilowatts energy production a is over 1 million kilowatts

10. Bonneville Dam Primary Functions Electrical Power Generation Electrical Power Generation enough to power half a million homes for a year enough to power half a million homes for a year

11. Bonneville Dam Primary Functions River navigation River navigation

12. Bonneville Dam Primary Functions Recreation Recreation

13. Bonneville Dam Primary Functions Fishing Fishing

14. Facts First Powerhouse (1933-37) 18 gates over a length of 1,450 ft 18 gates over a length of 1,450 ft Dam: Dam: 1,027 ft long 1,027 ft long 77 feet high 77 feet high 10 generators 10 generators nominal total output capacity of 526.7 MW nominal total output capacity of 526.7 MW Overload capacity 577 MW. Overload capacity 577 MW.

15. Facts Second Powerhouse (1974-82) Dam Dam 986 ft long 986 ft long 77 feet high 77 feet high 8 generators (plus two at fish ladders) 8 generators (plus two at fish ladders) nominal total generating capacity of 558.2 MW; nominal total generating capacity of 558.2 MW; Overload capacity 612 MW. Overload capacity 612 MW.

16. Facts Bonneville Lock Constructed from 1987 to 1993 at a cost of $341 million Constructed from 1987 to 1993 at a cost of $341 million 85 ft wide 85 ft wide 676 ft long 676 ft long Transit time is approx. 30 min. Transit time is approx. 30 min. Replaced earlier smaller lock built 1938. Replaced earlier smaller lock built 1938.

17. Facts Lake Bonneville 77 km (48 mi) long reservoir on the Columbia River created by Bonneville Dam 77 km (48 mi) long reservoir on the Columbia River created by Bonneville Dam

18. Facts Lake Bonneville 77 km (48 mi) long reservoir on the Columbia River created by Bonneville Dam 77 km (48 mi) long reservoir on the Columbia River created by Bonneville Dam

19. Facts Lake Bonneville 77 km (48 mi) long reservoir on the Columbia River created by Bonneville Dam 77 km (48 mi) long reservoir on the Columbia River created by Bonneville Dam http://www.youtube.com/watch?v=ekpmCV5Z ZU8&feature=player_embedded

20. Environmental and social implications California Sea Lions are also attracted to the large number of fish and are often seen California Sea Lions are also attracted to the large number of fish and are often seen around the base of the dam during the spawning season. around the base of the dam during the spawning season. By 2006, the growing number of crafty sea lions and their impact on the salmon population By 2006, the growing number of crafty sea lions and their impact on the salmon population Big concerns among Army Corps of Engineers and environmentalists Big concerns among Army Corps of Engineers and environmentalists

21. Environmental and social implications California Sea Lions are also attracted to the large number of fish and are often seen California Sea Lions are also attracted to the large number of fish and are often seen around the base of the dam during the spawning season. around the base of the dam during the spawning season. By 2006, the growing number of crafty sea lions and their impact on the salmon population By 2006, the growing number of crafty sea lions and their impact on the salmon population Big concerns among Army Corps of Engineers and environmentalists Big concerns among Army Corps of Engineers and environmentalists

22. Environmental and social implications Solution: Solution: States apply for permit to kill California Sea Lions States apply for permit to kill California Sea Lions

23. Environmental and social implications Solution: Solution: States apply for permit to kill California Sea Lions States apply for permit to kill California Sea Lions

24. Environmental and social implications Should we kill the crafty sea lions? Should we kill the crafty sea lions? Should we let them eat all the salmons? Should we let them eat all the salmons? How to balance? How to balance?

25. Environmental and social implications Solution: Solution: California Sea Lions a custom- built “capture cage” to temporarily sequester the California Sea Lions

26. Environmental and social implications Fishermen: Fishermen:

27. Environmental and social implications The Bonneville Dam blocked the migration of white sturgeon to their upstream spawning areas. The Bonneville Dam blocked the migration of white sturgeon to their upstream spawning areas. Sturgeon still spawn in the area below the dam and the lower Columbia River Sturgeon still spawn in the area below the dam and the lower Columbia River Small very depressed populations of white sturgeon persist in the various reservoirs upstream. Small very depressed populations of white sturgeon persist in the various reservoirs upstream.

28. Questions??? How to find the right balance? How to find the right balance?