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Flow Augmentation for Salmon on the Lower Snake River Provided by Bill Ondrechen Idaho Department of Water Resources: 1987 - 2003

Flow Augmentation provided to speed flow through Lower Snake Reservoirs
(units in 1000 acre feet)

Year	Upper Snake River Basin	Boise River Basin	Payette River Basin	Oregon Rivers into Snake	Total Augmentation above Brownlee	Idaho Power Company Brownlee	Dworshak on Clearwater	Total Snake River Augmentation
1987	150				150		300	450
1988	50				50		300	350
1989	100				100	50	280	430
1990	63				63	87	379	529
1991	50		50		100	174	1,106	1,380
1992	49		140		189	110	900	1,199
1993	272	23	130		425	277	1,042	1,744
1994	330	36	62		428	327	1,900	2,655
1995	255	27	145		427	235	1,400	2,062
1996	218	38	151	20	427	269	1,867	2,563
1997	214	40	155	18	427	244	1,639	2,310
1998	223	41	145	18	427	363	1,253	2,043
1999	208	41	160	18	427	270	1,108	1,805
2000	223	41	145	18	427	286	1,205	1,918
2001	41	0	30	18	89	0	1,005	1,094
2002	37*	60	160	18	275	0	1,220	1,495
2003	43*	59	160	18	280	0	1,230	1,510
2004	116*	42	166	18	342	0	1,230	1,572
2005	239	44	130	18	431	0	1,230	1,661

Notes:
Columbia River Water Mgt Reports used to identify Brownlee and Dworshak contributions for the 1987-1992 period.
Upper Snake contributions from WD-01.
*In 2002-04, Upper Snake River water was provided exclusively by high lift pumps which were bought out of use during energy 'crisis'.

The quantities are in thousands of acre feet. This enables a comparison to the amount of storage space in various reservoirs. For example Dworshak Reservoir has an active capacity of just over 2 million acre feet. The conversion to flow rate depends on the time period over which the volume is spread: 100,000 acre feet over a 31 day month averages to 1626 cubic feet per second (cfs).

Related Sites:
Sending Water Downstream for Fish, by Jennifer Sandmann, Times-News 9/6/3