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Spill Operations at Columbia and Snake River Dams 2000, 2004 and 2010 Operations Bonneville Power Administration Exhibit A, Case 3:01-cv-00640-RE Document 1837-1, Filed 02/11/11

The following table shows increases in spill to improve juvenile salmon passage conditions implemented at lower Snake and Columbia River dams since the 2000 BiOp. Generally, these spill increases include:

• Spring: Increasing spring spill at John Day, McNary, Little Goose, and Lower Granite dams from nighttime only spill to 24-hour spill at each dam

• Summer: Increasing summer spill at John Day Dam from nighttime only spill to 24-hour spill Moving from "no spill" operation in summer at McNary, Lower Monumental, Little Goose, and Lower Granite dams to 24-hour spill operation at each dam for the entire summer

Spill Operations at Columbia and Snake River Dams
2000, 2004 and 2010 Operations

Dam	Season	2000 Operations1	2004 Operations1	2010 Operations2	Change from 2000 to 2010 bluefish estimate4
Bonneville	spring	75 kcfs day Gas Cap night	75 kcfs day Gas Cap night	24-hour spill (100 kcfs)	(0.5 x 25 + 0.5 x 100) = 62 kcfs	62 kcfs x 3.7 MWh/kcfs x 2160 hr = 500,000 MWh
The Dalles	spring	24-hour spill (40%)	24-hour spill (40%)	24-hour spill (40%)	0 kcfs	0
John Day	spring	nighttime spill (60%)	nighttime spill (60%)	24-hour spill (30%)	0.5 x -0.3 x 250 + 0.5 x 0.3 x 250 = 0 kcfs	0
McNary (assume ~250 kcfs)	spring	nighttime spill (Gas Cap)	nighttime spill (Gas Cap)	24-hour spill (40%)	0.4 x 250 = 100 kcfs	100 kcfs x 4.9 MWh/kcfs x 2160 hr = 1,000,000 MWh
Subtotal	162 kcfs	1,500,000 MWh
Ice Harbor	spring	45 kcfs day Gas Cap night	24-hour spill (20 kcfs)	Testing 30% vs. 45 kcfs day Gas Cap night	0 kcfs	0
Lower Monumental	spring	24-hour spill (Gas Cap)	24-hour spill (Gas Cap)	24-hour spill (Gas Cap)	0 kcfs	0
Little Goose (assume ~100 kcfs)	spring	nighttime spill (Gas Cap)	nighttime spill (Gas Cap)	24-hour spill (30%)	0.5 x 100 = 50 kcfs	50 kcfs x 6.9 MWh/kcfs x 2160 hr = 750,000 MWh
Lower Granite (assume ~100 kcfs)	spring	nighttime spill (Gas Cap)	24-hour spill (20 kcfs)	24-hour spill (20 kcfs)	0.5 x 100 = 50 kcfs	50 kcfs x 6.9 MWh/kcfs x 2160 hr = 750,000 MWh
Subtotal	100 kcfs	1,500,000 MWh
Bonneville	summer	75 kcfs day Gas Cap night	75 kcfs day Gas Cap night	85 kcfs day Gas Cap night	0.5 x 10 = 5 kcfs	5 kcfs x 3.7 MWh/kcfs x 2160 hr = 40,000 MWh
The Dalles	summer	24-hour spill (40%)	24-hour spill (40%)	24-hour spill (40%)	0 kcfs	0
John Day	summer	nighttime spill (60%)	24-hour spill (30%)	24-hour spill (30%)	0.5 x -0.3 x 150 + 0.5 x 0.3 x 150 = 0 kcfs	0
McNary (assume ~150 kcfs)	summer	no spill	no spill	24-hour spill (50%)	0.5 x 150 = 75 kcfs	75 kcfs x 4.9 MWh/kcfs x 2160 hr = 800,000 MWh
Subtotal	80 kcfs	840,000 MWh
Ice Harbor	summer	45 kcfs day Gas Cap night	45 kcfs day Gas Cap night	Testing 30% vs. 45 kcfs day Gas Cap night	0 kcfs	0
Lower Monumental	summer	no spill	no spill	324-hour spill (17 kcfs)	17 kcfs	17 kcfs x 7 MWh/kcfs x 2160 hr = 260,000 MWh
Little Goose (assume ~35 kcfs)	summer	no spill	no spill	324-hour spill (30%)	0.3 x 35 = 10 kcfs	10 kcfs x 6.9 MWh/kcfs x 2160 hr = 150,000 MWh
Lower Granite	summer	no spill	no spill	324-hour spill (20 kcfs)	20 kcfs	20 kcfs x 6.9 MWh/kcfs x 2160 hr = 300,000 MWh
Subtotal	47 kcfs	710,000 MWh
				TOTAL	390 kcfs	~4,500,000 MWh = $160 million ($35/MWh)

Notes:
Gas Cap refers to spilling so as not to exceed State Water Quality standards of Total Dissolved Gas (%TDG).
( %) denotes percentage of the river to be spilled
( kcfs) denotes thousand cubic feet per second

Footnotes:
¹ 2007 FCRPS Biological Assessment, Appendix Table A-10
² 2010 Spring and Summer Fish Operations Plans, 2010 Corps Administrative Record 00349 at 008244 and 01439 at 027729
³ Summer 24-hour spill began in 2005 as part of the 2005 court order
⁴ MW/kcfs conversion factors for each dam from Power from River Flow webpage.