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<br />
<br /> FLOODING SOURCE FIDODWAY BASE FLOOD
<br /> WATER SURFACE ELEVATION
<br /> SECTION MEAN WITH I WITHOUT Fl :E
<br />CROSS SECTION DISTANCE WIDTH AREA VELOCITY FLOODWAY FLOODWA\' IFFERENC
<br /> (FEET) (S~::f (FEET PER (FEET NGVD)
<br /> SECOND)
<br />st. Vrain Creek
<br /> A 170,130 1402 1,120 9.2 5,291. 3 5,290.3 1.0
<br /> B 170,410 4252 1,760 5.9 5,291. 3 5,290.3 1.0
<br /> C 170,620 2202 1,040 9.9 5,293.2 5,292.2 1.0
<br /> D 171,570 1552 1,040 9.9 5,304.7 5,303.7 1.0
<br /> E 172,480 203 880 11.7 5 , 311. 5 5,310.5 1.0
<br /> F 173,448 156 880 11. 7 5,319.3 5,318.3 1.0
<br />North St.. Vrain
<br /> Creek
<br /> A 415 130 881 11.6 5,327.2 5,326.2 1.0
<br /> B 1,167 70 400 12.3 5,333.8 5,332.8 1.0
<br /> C 1,720 95 560 8.8 5,339.4 5,338.4 1.0
<br /> D 2,165 67 480 10.2 5,343.1 5,342.1 1.0
<br /> E 2,728 85 560 8.8 5,348.1 5,347.1 1.0
<br /> F 3,606 63 480 10.2 5,357.4 5,356.4 1.0
<br /> G 4,225 100 543 9.0 5,364.1 5,363.1 1.0
<br /> H 5,087 211 560 8.8 5,370.5 5,369.5 1.0
<br /> I 5,960 110 672 7.3 5,378.3 5,377.3 1.0
<br /> J 6,920 70 480 10.2 5,387.3 5,386.3 1.0
<br />South St. Vrain
<br /> Creek
<br /> A 558 3842 1,360 7.5 5,328.5 5,327.5 1.0
<br /> B 1. 039 180 668 14.1 5,333.8 5,332.8 1.0
<br />
<br />1 2
<br />Feet Above Mouth This Width Extends Beyond Corporate Limits
<br />
<br />DEPARTMENT OF HOUSING AND URBAN DEVElOPMENT
<br />Federal Insurance Administration
<br />
<br />FLOODWAY DATA
<br />
<br />-4
<br />:.
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<br />....
<br />...
<br />
<br />TOWN OF LYONS, CO
<br />[BOULDER CD.)
<br />
<br />ST. VRAIN CREEK-NORTH ST. VRAIN CREEK-SOUTH ST. VRAIN CREEK
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