Adult Salmonid Passage at Bonneville & Lower Granite Dams
Species--> |
Chinook
includes Jacks |
Steelhead |
Sockeye |
Coho
includes Jacks |
2009 Tidbit |
2nd best run at Lower Granite (in part due to high # of jacks) |
New record at Lower Granite and 2nd best run in 71 years at Bonneville |
Surpassed 2008 record at Lower Granite |
New record at Lower Granite and 2nd best run in 71 years at Bonneville |
Dam --> |
Bonneville |
L.Granite |
Bonneville |
L.Granite |
Bonneville |
L.Granite |
Bonneville |
L.Granite |
2009 (thru Dec 11 @ BON, Dec 8 @ LGR) |
699,115 |
168,032 |
604,459 |
323,388 |
177,823 |
1,219 |
234,661 |
4,912 |
2008 |
587,428 |
115,632 |
357,820 |
175,481 |
213,607 |
909 |
146,059 |
4,770 |
* Year w/highest record |
2003:
992,231 |
2001:
210,381 |
2001:
633,073 |
2009:
323,388 |
1955:
237,748 |
2009:
1,219 |
2001:
266,314 |
2009:
4,912 |
* Year w/2nd highest record |
2001:
971,119 |
2009:
168,032 |
2009:
604,459 |
2001:
262,568 |
1953:
235,215 |
2008:
909 |
2009:
234,661 |
2008:
4,770 |
Initial Count |
1938:
271,799 |
1975:
28,460 |
1938:
107,003 |
1975:
17,311 |
1938:
75,040 |
1975:
209 |
1938:
15,185 |
1975:
921 |
10-Year Average (excludes current yr) |
670,115 |
91,065 |
360,637 |
163,853 |
78,642 |
152 |
119,860 |
1,902 |
Normal Passage Window |
15 Mar -
15 Nov |
1 Apr -
30 Nov |
1 Apr -
31 Mar |
1 Apr -
31 Dec |
1 Jun -
15 Aug |
15 Jun -
30 Sept |
15 July -
15 Nov |
15 Aug -
30 Nov |
* Since dam construction
Other Notes:
- Bonneville Dam is most downstream or first dam on the Columbia River; Lower Granite Dam is most upstream or last of the 4 Lower Snake River dams.
- All numbers are based on daytime visual observations. In general, counts occur between 0400 – 2000 hours (PST). Counters observe passage at window for 50 minutes every hour. Raw number counts are multiplied by 1.2 to approximate the total number of fish passing the count window(s). Night count data are not included.
Please provide questions or comments to fish passage@usace.army.mil, telephone 509.527.7125
|