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Title: Lower Granite Dam Smolt Monitoring Program, 2005-2006 Annual Report.

Abstract

The 2005 fish collection season at Lower Granite Dam (LGR) was characterized by average water temperatures, below average flows, above average spill, low levels of debris and the record number of smolts collected compared to the previous five years. With the continued release of unclipped supplementation chinook and steelhead above LGR, we cannot accurately distinguish wild chinook, steelhead, and sockeye/kokanee in the sample. For the purposes of this report we will designate fish as clipped and unclipped. This season a total of 13,030,967 juvenile salmonids were collected at LGR. Of these, 12,099,019 were transported to release sites below Bonneville Dam, 12,032,623 by barge and 66,396 by truck. An additional 898,235 fish were bypassed to the river due to over-capacity of the raceways, barges or trucks and for research purposes. This was the first season of summer spill at LGR. Spill was initiated at 12:01am June 20 as directed by the ruling set forth by Judge James Redden of the United States District Court (Order CV 01-640-RE). In addition, the Lower Granite project also conducted a summer spill test alternating spill and spill patterns between spill to the gas cap without the removable spillway weir (RSW) and spill with up tomore » 20 kcfs utilizing the RSW. Because of the forecast low flow this year, most hatchery reared subyearling fall chinook were released up to three weeks early. With the unexpected high flows in late May and early June, more than 90% of the subyearling chinook were collected prior to the initiation of the court ordered summer spill program. Collection number fluctuations reflect river flow and project operations for any given year. For example, low flow years (2001, 2004 and 2005) result in higher collection numbers. Court ordered spill throughout the summer migration will directly affect collection of fall subyearling chinook collection numbers. The editors of this report urge the reader to use caution when comparing fish collection numbers between years, considering both annual river flows and annual project operations, because both affect fish migration and collection.« less

Authors:
; ;  [1]
  1. (Washington Department of Fish and Wildlife, Olympia, WA)
Publication Date:
Research Org.:
Washington Department of Fish and Wildlife
Sponsoring Org.:
United States. Bonneville Power Administration.
OSTI Identifier:
900554
Report Number(s):
DOE/BP-00022085-3
R&D Project: 198712700; TRN: US200711%%698
DOE Contract Number:  
00022085
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; FLUCTUATIONS; GRANITES; JUVENILES; MONITORING; RIVERS; SEASONS; SPILLWAYS; WATER; Salmon - Migration - Snake River Watershed (Wyo.-Wash.); Salmon - Migration - Columbia River Watershed

Citation Formats

Mensik, Fred, Rapp, Shawn, and Ross, Doug. Lower Granite Dam Smolt Monitoring Program, 2005-2006 Annual Report.. United States: N. p., 2007. Web. doi:10.2172/900554.
Mensik, Fred, Rapp, Shawn, & Ross, Doug. Lower Granite Dam Smolt Monitoring Program, 2005-2006 Annual Report.. United States. doi:10.2172/900554.
Mensik, Fred, Rapp, Shawn, and Ross, Doug. Mon . "Lower Granite Dam Smolt Monitoring Program, 2005-2006 Annual Report.". United States. doi:10.2172/900554. https://www.osti.gov/servlets/purl/900554.
@article{osti_900554,
title = {Lower Granite Dam Smolt Monitoring Program, 2005-2006 Annual Report.},
author = {Mensik, Fred and Rapp, Shawn and Ross, Doug},
abstractNote = {The 2005 fish collection season at Lower Granite Dam (LGR) was characterized by average water temperatures, below average flows, above average spill, low levels of debris and the record number of smolts collected compared to the previous five years. With the continued release of unclipped supplementation chinook and steelhead above LGR, we cannot accurately distinguish wild chinook, steelhead, and sockeye/kokanee in the sample. For the purposes of this report we will designate fish as clipped and unclipped. This season a total of 13,030,967 juvenile salmonids were collected at LGR. Of these, 12,099,019 were transported to release sites below Bonneville Dam, 12,032,623 by barge and 66,396 by truck. An additional 898,235 fish were bypassed to the river due to over-capacity of the raceways, barges or trucks and for research purposes. This was the first season of summer spill at LGR. Spill was initiated at 12:01am June 20 as directed by the ruling set forth by Judge James Redden of the United States District Court (Order CV 01-640-RE). In addition, the Lower Granite project also conducted a summer spill test alternating spill and spill patterns between spill to the gas cap without the removable spillway weir (RSW) and spill with up to 20 kcfs utilizing the RSW. Because of the forecast low flow this year, most hatchery reared subyearling fall chinook were released up to three weeks early. With the unexpected high flows in late May and early June, more than 90% of the subyearling chinook were collected prior to the initiation of the court ordered summer spill program. Collection number fluctuations reflect river flow and project operations for any given year. For example, low flow years (2001, 2004 and 2005) result in higher collection numbers. Court ordered spill throughout the summer migration will directly affect collection of fall subyearling chinook collection numbers. The editors of this report urge the reader to use caution when comparing fish collection numbers between years, considering both annual river flows and annual project operations, because both affect fish migration and collection.},
doi = {10.2172/900554},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon Jan 01 00:00:00 EST 2007},
month = {Mon Jan 01 00:00:00 EST 2007}
}

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