FLOOD07952

• County: Fremont
• Community: Canon City
• Stream Name: Four-mile Creek, Mud Gulch
• Basin: Arkansas
• Title: Floodplain Management Study - Four-Mile Creek and Mud Gulch at Canon City
• Date: 10/1/2002
• Prepared For: Canon City, Fremont County
• Prepared By: USDA Soil Conservation Service
• Floodplain - Doc Type: Floodplain Report/Masterplan

I
II
I
I
I
I
I
I

I:

I
I
I
I
I
I
I
I

drainage areas for the selected stream gauges vary from 86.6 to 1,320 square miles,

and the gauge elevations range from 4,100 feet to 6,910 feet.

TABLE 1

W/S
Gauge Location Area
(sq. mi.)
06700500 Goose Creek above Cheesman Lake 86.6
06707000 North Fork South Platte River 479
06709500 Plum Creek near Louviers 302
06710500 Bear Creek at Morrison 164
07096500 Four-Mile Creek near Canon City 434
07106000 Fountain Creek near Fountain, CO 681
07119500 Apishapa River near Fowler, CO 1,125
07121500 Timpas Creek at S\\1nk, CO 496
07122400 Crooked Arroyo near Swink, CO 108
07124500 Purgatoire River at Trinidad, CO 795
07126000 Purgatoire River near Alfalfa, CO 1,320
Table 1 - Regional Analysis of Us. Geological Surveys Stream Gauges

The linear equations for Four-Mile Creek's discharges are:

Years of
Record

58
72
41
81
26
23
57
28
24
69
22

Q(1O) = 1O[1.4I9327*Log(a) - 0.095560]
Q(25) = 1O[1.39032I*Log(A) + 0.186880]
Q(50) = 1O[1.363207*Log(A) + 0.394743]
Q(100) = 1O[1.334726*Log(A) + 0.594275]
Q(500) = 1O[1.260348*Log(A) + 1.048243]
It nere watershed area A .~ 434 square miles

Corr. Coefficient
0.91
0.88
0.84
0.80
0.68

Gauge Frequency Flow (cfs)
rD Io-Year 25-Year 50-Year 1Oo-Year
07096500 4,445 7,142 9.777 13,019
* 0(500) = 23,200 cis (by graph) is recommended for use.

2. Mud Gulch's Hydrology- TR-20 computer program model was used in

calculating frequency flows for the Mud Gulch basin.

12

.

Sta. Ave.
Ske\\'

0.05
0.05
0.05
0.05
0.36
0.11
0.00
0.00
0.00
0.00
0.00

500-Year*
23,572