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I I BOULDER CREEK I Ql00-YR ~ 12,000 cfs I URS NO. 7142 TABLE VI-2 FLOW CHARACTERISTICS OF SELECTED ALTERNATIVE I INVERT COMPUTED I ELEVATION WATER ENERGY CROSS- HYDRAULI C CRITICAL FROUOE NO (FT ABOVE SURFACE GRAOELI NE L1 TOP EXPANSION/ MAXIMUM SECTIONAL AVERAGE DEPTH VELOCITY \/-A\/F CROSS-SECT I ON tlX MEAN SEA ELEVATI ON. ELEVATION, TOP WIDTH WIDTH CONTRACTION VELOC I TY AREA, A VELOCITY A/T "\Ig AfT (gA/T)! STATION. (FEET) LEVEL) (CWSEU (EGL) (FEET) (FEET) RATIO (FEET /SEC) (FEET2 ) (FEET/SEC) (FEET) (FEET /SEC) I 180 10l 0.56 1322+80 5395.7 5408.08 5409.31 l8l 9.7 1386 8.66 7.66 l5.70 0.55 I 100 - 27 -0.27 l323+80 5397.5 5408.67 54l1.66 l54 16.0 945 12.70 6.14 l4.06 0.90 530 57 O. II 1325+00 5399.1 54l4.95 54l5.77 211 8.1 l758 6.83 8.33 16.38 0.42 I 220 - 50 -0.23 l326+00 5400.00 54l5.65 5416.84 161 9.6 1448 8.29 8.99 l7.02 0.49 250 - 26 -0. lO I 1328+50 5406.0 5420.43 5423.99 l35 16.4 890 13.48 6.59 l4.57 0.93 175 - 29 -0.17 l33D+ 25 54l2.3 5423.59 5426.5l l06 13.8 885 13.56 8.35 l6.40 0.83 410 - 37 -0.09 I l334+30 54l7.9 5434.04 5438.98 69 17.9 656 l8.29 9.5l l7.50 1. 05 475 6l o. l3 l339-lO5 5426.00 5441.98 5442.96 l30 8.2 l545 7.77 ll.88 19.56 0.40 I 25 lO 0.40 1339+30 5432.7 5441.65 5443.53 140 1 1. 03 1057 ll.35 7.55 l5.59 0.73 10 0 0 I l339+40 5432.8 544l.76 5443.65 140 11.0 l057 ll.35 7.55 l5.59 0.73 l5 0 0 l339+55 5433.00 5441.92 5443.82 l40 l1.0 1053 ll.40 7.52 l5.56 0.73 20 - 1 -0 I 1339+75 5433.3 5442.13 5444.08 l39 11.2 l04l Il.53 7.49 15.53 0.74 355 34 0.10 l343+30 5441. 7 5453.09 5455.88 l73 14.4 934 12.85 5.4 l3. l8 0.97 I 250 ~ 1345+00 5445.00 5459.02 5462.00 l74 15.4 950 12.63 5.46 13.26 0.95 30 153 5. lO I l345+30 5445.5 5471. 82 5471.97 327 3.8 4084 2.94 12.49 20.05 0.15 40 50 1. 25 l345+80 5447.3 547l.85 5471. 99 377 3.6 4313 2.78 ll.44 19.19 0.14 I I 58 I