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<br />• TABLE-5
<br />ST. VRAIN CREEK
<br />YEAR 2000 URBANIZATION
<br />AT LONGMONT AND LYONS 1
<br />Drainage
<br />Station Area 5-Year 10-Year 50-Year
<br />Confluence No.
<br />6 Sc. St. Vrain
<br />Lyons Gage
<br />Tributaries Above
<br /> Below
<br />Lykins Gulch Above
<br /> Below
<br />Dry Creek Above
<br /> Below
<br />• ~
<br />~
<br />Lefthand~Cr.
<br />S Above
<br />' Thee Slough ; . Below
<br />Dry Creek d ~-Above.
<br />Spring Gulch Below
<br />Boulder Creek Above
<br /> Below
<br />Idaho Creek Above
<br /> Below
<br />Right Bank Tribs Above
<br /> Below
<br />Left Bank Tribs Above
<br /> Below
<br />Platteville Gage
<br />MouCh
<br />(sq.mi.) (c.f.s.) (c.f.s.) (c.f.s.)
<br />211, J02* 1,300
<br />2,040 5,570
<br />212, 103* 1,30C
<br />111* 1,45C
<br />I20* 1,65C
<br />132* 2,050
<br />143* 2,500
<br />144* 2,500
<br />156* 2,800
<br />157* 2,800
<br />242* 3,700
<br />245* 3,600
<br />274* 4,400
<br />277* 4,500
<br />825** 4,550
<br />837** 470
<br />849** 4,500
<br />850** 4,300
<br />881** 4,450
<br />904** 4,050
<br />420** 4,050
<br />976, 922** 4,000
<br />924** 3,950
<br />2,03G
<br />2,490
<br />3,070
<br />3,180
<br />3,750
<br />3,7 I0
<br />4,19.0
<br />4,190
<br />5,520
<br />5-,440
<br />6,510
<br />6,590
<br />6,400
<br />5,560
<br />6,070
<br />6,860
<br />6,900
<br />7,610
<br />7,450
<br />8,280
<br />8,280
<br />11, 120
<br />11,010
<br />13,050
<br />13, 130
<br />100-Year 500-Year
<br />(c.f.s.) (c.f.s.)
<br />8,880 20,260
<br />8,830
<br />9,.080
<br />9,960
<br />9,870
<br />10,510
<br />10,220
<br />II,O80
<br />II,080
<br />15,220
<br />15,080
<br />17,450
<br />17,520
<br />20, 140
<br />20,270
<br />2{,450
<br />19,680
<br />20,460
<br />19,910
<br />21, 140
<br />21,140
<br />28,500
<br />28,370
<br />31,920
<br />31,920
<br />42,240
<br />41,430
<br />6,280 12,780 17,070 41,190
<br />6,500 -12,800 17,270 41,730
<br />5,940 12,280 16,910 40,360
<br />6,000 12,320 16,990 40,430
<br />5,880 12,120 16,830 40,070
<br />5,820 12,030 16,770 34,930
<br />* Contributing Area (Excludes Area Above Button Rock Dam)
<br />** Contributing Area (Includes Area Above Button Rock Dam)
<br />Dnderlined Discharges (6,4D0) Indicate Discharges Above [he Lines Were Obtained
<br />• from 277 Square Mile Contributing Area Above Boulder Creek.
<br />-42-
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