SEASON SPAWNING FLOW FOR SALMON. The Season Spawning Flow for each species shall be defined as the average of the highest ten (10) Daily Spawning Flows at Newhalem gage during the spawning period" (Section 6.3.2.1). A sample calculation follows: Suppose that spawning flow is based on the 10 highest days in a fifty (50) day spawning period. In the year X, the City planned to spawn pink salmon at an average Daily Spawning Flow (DSF) of 3,500 cfs or less. The fish actually spawned over a fifty day period at the following average DSF. Days marked with an asterisk were characterized by high Sidestream Inflow conditions beyond the City's means of control (see Sidestream Inflow, above). The DSF calculated for those days excludes the effect of Sidestream Inflow beyond the threshold of 2,500 cfs. DAILY SPAWNING FLOWS AT NEWHALEM GAGE IN CFS (SEPTEMBER 12 - OCTOBER 31, YEAR X) day 1 3021 day 26 2789 day 2 3202 day 27 2987 day 3 3105 day 28 3154 day 4 3220 day 29 3218 day 5 3305 day 30 3212 day 6 3011 day 31 3290 day 7 3232 day 32 3110 day 8 3111 day 33 3009 day 9 2993 day 34 3005 day 10 3002 day 35 2998 day 11 3209 day 36 2780 day 12 3403 day 37 2657 day 13 3577 day 38 2678 day 14 3598 day 39 2790 day 15 3899 day 40 2899 day 16* 3555 day 41 2869 day 17* 3600 day 42 2765 day 18* 3450 day 43 2876 day 19* 3400 day 44 2975 day 20 3389 day 45 3081 day 21 3107 day 46 3110 day 22 3025 day 47 3265 day 23 2987 day 48 3350 day 24 2807 day 49 3449 day 25 2524 day 50 3354 Calculations: The average of the highest 10 days DSF (3899, 3577, 3598, 3600, 3555, 3450, 3403, 3400, 3449, and 3389) is 3,532 cfs. This is the Season Spawning Flow for pink salmon in the year X. Action: Referring to the nearest Season Spawning Flow listed in APPENDIX C, Table C-2, (Salmon Spawning/Incubation Flow Tables), the power scheduler determines the minimum requirements for incubation flow: November 2,100 cfs February 2,400 cfs December 2,500 cfs March 2,300 cfs January 2,500 cfs April 2,300 cfs 3. SEASON SPAWNING FLOW FOR STEELHEAD
