Columbia River System Operation Review : Final Environmental Impact Statement, Appendix C: Anadromous Fish and Juvenile Fish Transportation. Page: 3 of 324
This report is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided to UNT Digital Library by the UNT Libraries Government Documents Department.
Extracted Text
The following text was automatically extracted from the image on this page using optical character recognition software:
Anadromous Fish Appendix
WHAT SOS ALTERNATIVES ARE CONSIDERED
IN THE FINAL EIS?
Seven alternative System Operating Strategies (SOS)
were considered in the Draft EIS. Each of the seven
SOSs contained several options bringing the total
number of alternatives considered to 21. Based on
review of the Draft EIS and corresponding adjust-
ments, the agencies have identified 7 operating
strategies that are evaluated in this Final EIS.
Accounting for options, a total of 13 alternatives is
now under consideration. Six of the alternatives
remain unchanged from the specific options consid-
ered in the Draft EIS. One is a revision to a pre-
viously considered alternative, and the rest represent
replacement or new alternatives. The basic catego-
ries of SOSs and the numbering convention remains
the same as was used in the Draft EIS. However,
because some of the alternatives have been dropped,
the numbering of the final SOSs are not consecutive.
There is one new SOS category, Settlement Discus-
sion Alternatives, which is labeled SOS 9 and re-
places the SOS 7 category. This category of alterna-
tives arose as a consequence of litigation on the
1993 Biological Opinion and ESA Consultation for
1995.
The 13 system operating strategies for the Federal
Columbia River system that are analyzed for the
Final EIS are:
SOS la Pre Salmon Summit Operation represents
operations as they existed from around 1983 through
the 1990-91 operating year, prior to the ESA listing
of three species of salmon as endangered or threat-
ened.
SOS lb Optimum Load-Following Operation
represents operations as they existed prior to
changes resulting from the Regional Act. It attempts
to optimize the load-following capability of the
system within certain constraints of reservoir opera-
tion.
SOS 2c Current Operation/No-Action Alternative
represents an operation consistent with that speci-
fied in the Corps of Engineers' 1993 Supplemental
EIS. It is similar to system operation that occurredin 1992 after three species of salmon were listed
under ESA.
SOS 2d [New] 1994-98 Biological Opinion repre-
sents the 1994-98 Biological Opinion operation that
includes up to 4 MAF flow augmentation on the
Columbia, flow targets at McNary and Lower Gran-
ite, specific volume releases from Dworshak, Brown-
lee, and the Upper Snake, meeting sturgeon flows 3
out of 10 years, and operating lower Snake projects
at MOP and John Day at MIP.
SOS 4c [Rev.] Stable Storage Operation with Modi-
fied Grand Coulee Flood Control attempts to
achieve specific monthly elevation targets year round
that improve the environmental conditions at stor-
age projects for recreation, resident fish, and wild-
life. Integrated Rules Curves (IRCs) at Libby and
Hungry Horse are applied.
SOS 5b Natural River Operation draws down the
four lower Snake River projects to near river bed
levels for four and one-half months during the
spring and summer salmon migration period, by
assuming new low level outlets are constructed at
each project.
SOS 5c [New] Permanent Natural River Operation
operates the four lower Snake River projects to near
river bed levels year round.
SOS 6b Fixed Drawdown Operation draws down the
four lower Snake River projects to near spillway
crest levels for four and one-half months during the
spring and summer salmon migration period.
SOS 6d Lower Granite Drawdown Operation draws
down Lower Granite project only to near spillway
crest level for four and one-half months.
SOS 9a [New] Detailed Fishery Operating Plan
includes flow targets at The Dalles based on the
previous year's end-of-year storage content,
specific volumes of releases for the Snake River, the
drawdown of Lower Snake River projects to near
spillway crest level for four and one-half months,
specified spill percentages, and no fish transporta-
tion.1995 FINAL EIS iii
1995
FINAL EIS iii
Upcoming Pages
Here’s what’s next.
Search Inside
This report can be searched. Note: Results may vary based on the legibility of text within the document.
Tools / Downloads
Get a copy of this page or view the extracted text.
Citing and Sharing
Basic information for referencing this web page. We also provide extended guidance on usage rights, references, copying or embedding.
Reference the current page of this Report.
Columbia River System Operation Review (U.S.). Columbia River System Operation Review : Final Environmental Impact Statement, Appendix C: Anadromous Fish and Juvenile Fish Transportation., report, November 1, 1995; Portland, Oregon. (https://digital.library.unt.edu/ark:/67531/metadc673041/m1/3/: accessed April 18, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.