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<br />Table 3. Estimated Discharges lor Arapahoe County
<br />
<br /> Discharge Drainage 1 DO-year
<br />Stream Name Location Area (mi') Discharge (cIs)
<br />Bijou Creek at Adams/Arapahoe County line 561,97 44,500
<br />Box Elder Creek at Elbert! Arapahoe County line 128.15 22,200
<br /> at East Quincy Avenue 146,95 24,300
<br />Coal Creek at Elbert/Arapahoe County line 30.65 8,900
<br /> at East Quincy Avenue 52.40 12,600
<br /> immediately upstream of tributary 55.81 13,100
<br />Coal Creek Tributary at East Quincy Avenue 7,75 3,700
<br /> at mouth 64.08 14,300
<br />Comanche Creek at Elbert/Arapahoe County line 67.42 11,100
<br /> at East Quincy Avenue 74,06 11,800
<br />East Bijou Creek at Elbert/Arapahoe County line 274.86 27,900
<br />East Comanche Creek at East Quincy Avenue 6,64 2,400
<br />First Creek 2 miles south of 1-70 at north line 01 S1 5 3,66 2,300
<br />Kiowa Creek at Elbert/Arapahoe County line 173,69 20,600
<br /> at 1-70 219.63 24,100
<br />Middle Bijou Creek at Elbert/Arapahoe County line 138.48 17,800
<br /> at Middle Bijou Creek trib., just south of 182,93 21,400
<br /> UPRR tracks
<br /> at mouth 199,08 22,600
<br />Middle Bijou Creek at mouth 9.50 3,100
<br />Tributarv
<br />Muddy Creek at Elbert/Arapahoe County line 12,04 3,600
<br /> at Adams/Arapahoe County line 71,87 11,600
<br />Rattlesnake Creek at mouth 34.87 7,200
<br />Sampson Gulch at mouth 2,71 1,900
<br />Senac Creek at Aurora Reservoir 4.99 2,800
<br /> at mouth 9,84 4,300
<br />Unnamed Creek immediately upstream of tributary 0.54 Outside Bounds
<br /> at East Quincy Avenue 2,11 1,600
<br /> at Aurora city limits 4.22 2,500
<br />Unnamed Creek Tributary at mouth 0,65 Outside Bounds
<br />West Bijou Creek at Elbert/Arapahoe County line 215,51 23,800
<br /> at East Quincy Avenue extended 244.13 25,800
<br />West Box Elder Creek at 1'70 15,67 5,800
<br />Wolf Creek at Elbert/ Arapahoe County line 38.61 7,700
<br /> at 1-70 85,22 13,000
<br />
<br />No USGS gaging stations with adequate periods-of-record were available to verify the peak
<br />discharges for approximate floodplains shown in Table 3, Discharges calculated in the PIS for
<br />determination of detailed floodplains are shown in the Appendix.
<br />
<br />Arapahoe County should regulate the approximate floodplains on a case-by-case basis. FEMA
<br />requires that a detailed floodplain analysis must be performed by a professional engineer and
<br />submitted by the developer or development proponent for development projects involving more 5
<br />acres or more than 50 units (whichever is more restrictive).
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