Biological Opinions - Bureau of Reclamation

LIST OF TABLES
Table 1.1. Listed species and critical habitats considered in this document. .................................. 1
Table 2.1 Chronology of Agency Coordination Team meetings for development of
Reclamation’s proposed action. .............................................................................................. 5
Table 4.1 UKL flood release threshold elevations for the last day of each month under relatively
dry or wet conditions. ........................................................................................................... 11
Table 4.2. Williamson River proportion targeted for release at Link River Dam. ....................... 19
Table 4.3. UKL fill rate adjustment factor. ................................................................................... 20
Table 4.4 Net accretion below Link River Dam adjustment factor. ............................................. 21
Table 4.5. Calculation of fall/winter Link River Dam target releases. ......................................... 22
Table 4.6. Fall/winter water management summary. .................................................................... 23
Table 4.7. UKL end of September elevation modeling objectives based on March50Volume.... 27
Table 4.8. Environmental Water Account based on UKL Supply. ............................................... 28
Table 4.9. Proposed minimum spring/summer Iron Gate Dam target flows (cfs). ....................... 28
Table 4.10. July, August, and September Iron Gate Dam maximum flow targets. ...................... 31
Table 4.11. Monthly maximum Lower Klamath NWR delivery and Upper Klamath Lake
elevation thresholds. ............................................................................................................. 36
Table 4.12. Proposed action model summary output results. ....................................................... 36
Table 4.13. Proposed minimum Tule Lake Sump 1A elevations (Reclamation datum). ............. 39
Table 7.1. Estimated LRS and SNS adult sucker population sizes. Note: The estimate for UKL
is based on Hewitt et al. (2012). Clear Lake and Gerber Reservoir contain self-sustaining
sucker populations. The “Other Areas” include Keno Reservoir, Tule Lake, Lost River, and
four Klamath River reservoirs downstream of Keno that are considered sink populations. 60
Table 7.2 Impaired water bodies within the action area (USDOI and CDFG 2012; Table 3.2-8).
............................................................................................................................................... 70
Table 7.3 Seasonal comparisons of potential threats to LRS and SNS in UKL from water quality
parameters, including microcystin. ....................................................................................... 72
Table 7.4 Estimated external phosphorus loading to UKL from various sources (ODEQ 2002). 76
Table 7.5 Percent change in October through February median monthly flows in the Sprague and
Williamson Rivers and net inflow to UKL, 1918 through 2012. .......................................... 81
Table 7.6 Percent change in March through June median monthly flows in the Sprague and
Williamson Rivers and net inflow to UKL, 1918 through 2012. .......................................... 82
Table 7.7 Percent change in July through September median monthly flows in the Sprague and
Williamson Rivers and net inflow to UKL, 1918 through 2012. .......................................... 83
Table 7.8 Percent change in water year median monthly flows in the Sprague and Williamson
Rivers and net inflow to UKL, 1918 through 2012. ............................................................. 84
Table 7.9 Threats to the LRS and the SNS in UKL. ..................................................................... 98
Table 7.10 Clear Lake elevation exceedances February through May. POR =1903-2012.
(Reclamation 2012 BA, Table 6-3). .................................................................................... 106
Table 7.11 Gerber Reservoir elevation exceedances, February through May. POR = 1925-2012
(Reclamation 2012, Table 6-4). .......................................................................................... 108
Table 7.12 September 30th Gerber Reservoir elevation exceedances 1925-2012 (Reclamation
2012, Table 6-4). ................................................................................................................. 109
Table 8.1 UKL end-of-month surface elevations in ft for the POR water years 1981 through
2011, based on KBPM modeling of the proposed action (Reclamation 2012, Table 7-1). 134
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