Bonneville/Lower Granite Dam Steelhead Count History

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Bonneville Dam Last Ten Years
Year	Total
2014	309,883
2013	226,643
2012	221,442
2011	357,280
2010	383,298
2009	590,199
2008	340,969
2007	310,276
2006	325,999
2005	302,437
2004	289,752
2003	346,951
2002	455,814
2001	605,681

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Lower Granite Dam Last Ten Years
Year	Fall	Spring	Total
2014-2015	154,965	8,988	163,953
2013-2014	100,345	7,791	108,136
2012-2013	101,640	7,546	109,186
2011-2012	171,285	9,035	180,320
2010-2011	195,947	12,018	207,965
2009-2010	312,430	10,952	323,382
2008-2009	167,603	11,267	178,870
2007-2008	146,230	7,878	154,108
2006-2007	138,313	10,853	149,166
2005-2006	147,506	7,678	155,184
2004-2005	146,350	5,296	151,646
2003-2004	164,471	8,039	172,510
2002-2003	205,975	16,201	222,176
2001-2002	255,723	12,743	268,466

Bonneville Dam run counted from July 1 to December 31.
Lower Granite Dam run counted from July 1 to December 31 (Fall) and March 1 to June 30 (Spring).
Most of the steelhead that are bound for Idaho pass Bonneville Dam between July 1 and October 31. Most of these fish pass Lower Granite Dam in the fall, however, some over-winter downstream of Lower Granite Dam and continue their migration to Idaho in the spring.

Last Updated: July 14, 2015
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