ISFAPPC02648

• Case Number: 03CW0273
• Stream Name: Thomas Creek
• Watershed: Crystal River
• Water Division: 5
• Water District: 38
• County: Pitkin
• Instream Flow App - Doc Type: Supplemental Data

square miles. The period of record for this gage was 1963 to 1968, the period of record used by
staff in their analysis was 1963 to 1968, or 5 years of record. Table 2 below displays the flow of
Thomas Creek upstream of the Lewis Ditch Headgate, in terms of a percentage of exceedence.

Table 2: Thomas Creek estimated flow upstream of the Lewis Creek Ditch.

Exceedences
1%
5%
10%
20%
50%
80%
90%
95%
99%

Januarv Februarv March ADril May June July August September ' October November December
5,47 4,64 7.11 15.46 21.64 23,19 23.89 17.01 14.38 7.95 7.42 5.78
5,10 4,64 5,88 10.82 20,10 21.64 23.19 17.01 14.07 7.42 6.65 5,41
4.87 4.64 5,88 8.19 17.01 21.64 23,19 15.46 13,30 7.42 6,65 5.41
4.64 4.51 5.10 7.42 15.15 20,10 18.55 14.64 11.44 6.80 6.18 5.41
3,71 3.40 4,02 4,95 11.90 17.01 14.46 12.75 8.66 5.18 5,10 4,02
3.25 2.78 3.25 4.33 7.42: 14.53 12,37 9,89 4.95 4,02 3.56 3.71
3.09 2.78 2.78 3.56 6,80 13,91 11.44 8.81 3.25 3.87 3,25 3.48
3.09 2.78 2.78 2,94 6,34 13.30 10.71 7.96 2.94 2,13 2.55 3,40
3,09 2.78 2.78 2,63 5.88 12.06 9,89 5.88 2,63 0.15 1.31 3.26

Thomas Creek Stream Flow
u/s of the Lewis Creek Ditch

9

6

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o

3

o

JAN

FEE

Ml>.R

Affi

Ml>.Y

JLN

JUL

AUG

SEP

ocr

foOl

DEe

Month

Table 2 shows that the summer recommendation of 2.5 cfs is available for April 1st through
October 31 st and the winter recommendation is available November 1 st through March 31 st.

Precipitation Data
Staff reviewed local precipitation data sets from 2 different sites located around the Thomas
Creek Drainage (see Precipitation Data in Appendix C). These sites include Aspen and
Glenwood Springs. Table 3 shows the water year and the percent of average precipitation
recorded at each site.

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