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<br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />1\ <br />II <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />FLOODING SOURCE 100 YR FLOODPLAIN DATA FLOODW4Y DATA 2 <br />IDENTIFICATION CROSS STATION1 DJ~ )(L-' ,(Ii.~ THALWEG FLOOD FLOOD- FLOOOWAY WIOTH FLOODWAY <br />ipECTlOA ~1:1GE ELElI.(m.s,l., ELEV. (mos.!.) PLAIN (FeeT) RIGHT (FeeT) TOTAL (FeeT) ELElI. (m.s.l.J <br /> , WIOTH7FeeTJ LeFT <br />Downstream Study Limit 6445 64+45 2600# 5213 .6 5221.5 540* 85 (85 ) 45 (45 ) 130 (130) 5221.5 (5221.5 ) <br /> 7170 71+70 2600# 5219.0 5225.8 530* 142 (142) 9 ( 9) 151 (151 ) 5226.6 (5226.1) <br /> 7590 75+90 2600# 5223.2 5230.8 220* 52 (52) 39 (39) 91 (91 ) 5230.8 (5230.8) <br />Arapahoe Road 7701 77+01 4230# 5223.6 5233.2 620** 290 (290)** 19 (19) 309 (309) 5233.2 (5233.2) <br /> 8205 82+05 4230# 5226.9 5235.2 390* 96 (146) 104 (154) 200 (300) 5235.2 (5235.2 ) <br /> 9100 91+00 4530# 5232.0 5237.9 360* 80 (120) 95 (95 ) 175 (215 ) 5238.3 (5237.9) <br /> 9716 97+16 4930# 5238 .4 5243.3 740* 37 (98) 188 (265 ) 225 (363) 5243.8 (5243.6) <br /> 10185 101+85 5330# 5241.4 5247.0 700* 190 (220) 200 (266) 390 (486) 5247.3 (5247.0 ) <br />McSorley Lane 10244 102+44 5330# 5241.8 5249.4 910* 190 (220) 200 (290) 390 (510 ) 5249.7 (5249.7) <br /> 10838 108+38 6630 5247.0 5253.7 2310 76 (76) 280 (430) 356 (506) 5254.6 (5254.1 ) <br /> 11352 113+52 6630 5250.4 5257.1 2460 154 (154) 396 (471 ) 550 (625 ) 5257.3 (5257.3 ) <br /> 11782 118+82 6630 5254.2 5261.3 2470 212 (292) 358 (508) 570 (800) 5262.1 (5261.9) <br /> 12318 123+ 18 6630 5258 . 6 5266.1 2120 358 (508) 317 (317) 675 (825 ) 5267.0 (5266.4 ) <br /> 12688 126+88 6630 5261.5 5269.9 1830 465 (547) 145 (260) 610 (802) 5270.1 (5270.0) <br /> 13178 131+78 6400 5267.2 5273.8 1670 464 (645) 25 (50) 489 (695) 5274.6 (5274.1) <br /> 13579 135+79 6400 5271.7 5278.5 1860 460 (635 ) 31 (90) 491 (725 ) 5278.7 (5278.7) <br />Baseline Road 13672 136+72 6400 5272.1 5282.7 3170 414 (614 ) 31 (l86) 445 (800) 5282.7 (5282.7) <br /> 14342 143+42 6400 5277 . 6 5285.2 1660 460 (477) 40 (240) 500 (717) 5285.5 (5285.2) <br /> 15075 150+75 6400 5284.4 5292.3 1890 495 (620) 180 (280) 675 (900) 5293.0 (5292.8 ) <br /> 15630 156+30 6400 5290.2 5297.2 1770 185 (335 ) 465 (565 ) 650 (900) 5297.8 (5297.5 ) <br /> 16024 160+24 6400 5293.8 5300.1 1610 96 (96) 585 (685 ) 681 (781 ) 5300.9 (5300.6) <br /> 16640 166+40 6400 5301.0 5306.3 2130 200 (200) 550 (606) 750 (806) 5306.6 (5306.5 ) <br /> 17 390 173+90 6400 5307.0 5312.1 2820 421 (471) 329 (429) 750 (900) 5312.6 (5312.6) <br /> 18050 180+50 6400 5312.2 5317.7 2860 75 (125 ) 675 (775 ) 750 (900) 5318.3 (5318.0) <br /> 18556 185+56 6400 5316.5 5322.2 2600* 24 (24) 868 (993) 892 (1017) 5322.8 (5322.7) <br /> 18825 188+25 6400 5319.0 5324.5 2100* 24 (24) 943 (1043) 967 (1067 ) 5325.2 (5324.9) <br /> 19143 191+43 6400 5321. 6 5327.2 1470 21 (21 ) 917 (1042) 938 (1063) 5328.1 (5327.7) <br /> 19410 194+10 6160 5325.0 5329.8 1270 14 (14 ) 897 (997) 911 (1011) 5329.8 (5329.9) <br /> 19640 196+40 6160 5327.8 5330.9 1840* 23 (23) 820 (995 ) 843 (1018) 5331.7 (5331.0) <br /> 19645 196+45 6160 5330.0 5332.2 1835* 21 (21) 830 (990) 851 (1011) 5333.1 (5332.6) <br />1 _Hoc,omng Trom mou n ITee'{;}. <br /> <br />2 Floodway data in parenthesis () represent floodway based on 0.5 ft rise in Energy Grade Line (EGL)- all other floodway data pertains to encroachment <br />for 1 foot rise in EGL- widths relative to channel centerline looking downstream. <br />* Width does not include shallow flooding area(s) between limits of Dry Creek No.2 Ditch split flow. <br />** Distance measured to split flow boundary. <br /># Discharge and corresponding floodplain/floodway data represents estimated flow in main channel cross section - see separate floodplain/floodway data <br />for split flow areas reference data for Dry Creek No.2 Ditch at the end of this table. <br /> <br />GREENHORNE and O'MARA, INC. <br />Engineers . Architects . Planners . Surveyors . Photogrummetrists <br />132!5 So&lfh CoD'ado Boulevn.Suit. 405' Denvtr, Colorado 80222- (303) 71S8~5250 <br /> <br />URBAN DRAINAGE AND FLOOD CONTROL DISTRICT <br />BOULDER COUNTY <br /> <br />IOO-YEAR FLOODPLAIN AND FLOODWAY <br />REFERENCE DATA <br />SOUTH BOULDER CREEK <br /> <br />TABLE <br />4 <br /> <br />18 <br />