FLOOD01902

• County: Pitkin
• Community: Aspen
• Title: Drainage Facility Capacity Analysis of City of Aspen
• Date: 9/1/1998
• Prepared For: Aspen
• Prepared By: WRC Engineering, Inc.
• Floodplain - Doc Type: Project

TABLE 2: RAINFALL DISTRIBUTION

2-YEAR, 1-1 lOUR PRECIPITATION (inches); 064
5. YEAR. I-IIOUR PRECIPITATION (inches) = 0.80
10- YEAR, 1-1I0UR PRECIPITATION (ine,",,) = 100
50-YEAR, I-HOUR PRECIPIT A TlON (inches) = 140
lOO-YEAR.l-1I0UR PRECIPITATlON(ine,",,)= 163

2-YEAR,HIOUR 5, YEAR, 2-1I0lJR 10- YEAR, 2-1I0UR 50-YEAR,2-1I0lJR 100, YEAR, 2-1I011R
RAINI'AI,L INCREMENTAL RAINfAl.l. INCREMENTAL RAJNI~^I.L INCREMENT AI. RAINfALl, INCREMENTAl, RAINFALL INCREMENTAL
TIME TIME DISTRIBUTION RAINI'AI.L OISTRIUUnON RAINFALL IlISTRIIlIITION IIAINFALI. IlISTRlfillTlON RAINFAI.!. D1STRIDlJTION RAINFALL
(minutes) (hours) % Distribution (inches) % Dis\ribution {inches} % DistJibutioll (inches) % Distribution {inches} % Distribution (inches)
5 0.0833 2.0% 001 2.0% 0.02 2.0% 0,02 1.3% 0.Q2 1,0%. 0.02
10 0.1661 4.0% om 3.1% 003 3.7% OJI4 ],5% 0.05 3.0% 005
15 0.2500 8.4% 0.05 8.1% 001 8.2% 0,08 50% 0.01 4.60/. 001
20 0.3333 16.0% 010 15.3% 0.12 15,0% 015 8.0% 0.11 8.0% 0.13
25 0.4161 25.0% 0.16 25.00A 0.20 250% 0.25 150% 0.21 14.0% 0.23
30 0.5000 14.l)"/o 0.09 nO% 010 12.0% 0.12 25.0% 035 25.00/. 0.41
35 0.5833 6.3% 0.04 5.8% 005 5.6% 006 12.0% 0.11 14.00/. 0.23
40 06667 5.0% om 4.40/. 004 4.3% 0.04 . 8.0% 0.11 8.0010 0.13
45 0.7500 3.0% 0.D2 3.6% 003 3.8% 004 5.0% 001 6.2% 0.10
50 0.8333 3.0% 0.02 ).6% 003 3.2% 003 5.0010 001 S.(}l1/o 0.08
55 0.9161 3.0% 0.D2 3.0% 0.02 3.2% 003 3.2% 0.04 4.0% 0.01
60 10000 3.0% 0.02 3.0% 0.Q2 3.2% 003 3.2% 0.04 4.QDIo om
65 1.0833 3.0% 0.02 HI% 0.02 3.2% 003 3.2% 004 4.0% 0.01
10 1.1661 2.0% om 3.0% 0.02 32% 0.03 2.4% 003 2.0% 003
15 1.2500 2.0% 0.01 2.5% 0.02 3.2% 003 2.4% 0.03 2.0% 0.03
80 1.3333 2.0% 001 2.2% 0.02 2.5% O.oJ 1.8% 003 1.2% 0.02
85 1.4161 2.0% om 2.2% 0.02 1.9% 0.02 1.8% 0.03 1.20/. 0.02
90 1.5000 2.0% 001 2.2% 0.02 1.9% 0,02 1.4% 0.02 1.2% 0.02
95 1.5833 2'()c'/o 001 2.2% 0.02 19% 002 1.4% 0.02 1.2% 0.02
100 1.6667 2.0";' 001 1.5% 001 1.9% 0.02 1.4% 0.02 1.2% 0.02
105 11500 2.0% 001 ).5% 001 1.9% 0.02 1,4% 0.02 1.2% 002
110 L83H 2.(P';' 0.01 1.5% 001 19% 002 1.4% 002 1.2% 0.02
liS 1.9167 1.0% 001 1.5% om 1.7% 0.02 1.4% 0.02 1.2% 0.02
120 2.0000 1.0% om 1.3% 001. 1.3% 001 1.4% 0.02 1.2% 0.02
TOTAL 115.7% 0.14 IIS.P/o 0.93 115.7% U6 115.6% 1.62 1.5.6% 1,88

NOTE: 2.hour precipitation quantities are 1.16 times the I-hour amount for a given frequency.

lainraUds

WAC Engineering
PNl963

'11'"
JOJ16AM