S10_11-15-04

• Basin: Statewide
• Title: SWSI Phase 1 Report - Section 10 Basin-Specific Options
• Date: 11/15/2004
• Author: CWCB
• SWSI - Doc Type: Final Report

Section 10
Basin-Specific Options
Table 10-4 Colorado Basin Water Districts and Associated
Stream Names
36 Blue River
37 Eagle River
38 Roarinq Fork River
50
51 Fraser/Colorado Rivers
52 Piney River
53 Rock/Derby/Sweeiwater/Deep Creeks
72 Plateau Creek/Colorado River
100 Colorado River
Various water districts in the Colorado Basin contain
conditional storage rights that date back to the early
1900s and extend to present day. As shown in
Table 10-5, there are nearly 3,000,000 AF of conditional
storage rights, which exceeds available supplies. The
numbers presented in this table describe the total volume
of conditional rights by priority time period and not the
number of individually decreed conditional rights. These
priority time periods are based on adjudication dates and
used solely for the purpose of aggregating the numerous
conditional rights into a table for presentation. The
number, rather than volume, of conditional rights is
presented in Appendix H.
Water Districts 37 and 70 in the Colorado Basin have the
largest volume of conditional storage rights. This is
depicted in Table 10-5 and also presented graphically in
Appendix H. A total of nearly 800,000 AF, both with
priority dates of between 1960 and 1980, are present in
these two water districts.
Figure 10-6 focuses on the priority date of the conditional
storage rights. The largest portion of storage rights have
priority dates of between 1960 and 1980, followed by the
1980 to 2002 time period.
~~
A map of the locations of the conditional storage rights in
the Colorado Basin is shown in Figure 10-7. Different
colored circles are used to represent the total volume of
conditional rights that each location holds. These rights
are held throughout the Colorado Basin. This figure also
shows the locations of potential damsites in the Colorado
Basin, as discussed in Section 10.1.4.4 below.
As noted in Section 7, water supply availability in the
Colorado Basin increases downstream, with the
headwater areas limited by physical water availability,
environmental and recreational needs, and transbasin
firming projects. Overall, there is water available for
development and existing conditional rights can produce
reliable yields with adequate storage, but the firm yield is
variable depending on location.
10.1.4.4 Colorado Basin Summary of Restricted
Reservoirs and Potential Storage Sites
Several restricted damsites exist in the Colorado Basin
and are listed in Table 10-6. However, the total volume of
restricted storage in the basin only equates to 1,881 AF
and rehabilitation of all of these reservoirs will not
significantly improve the availability of supply.
Figure 10-8 also shows these data graphically. While the
other water districts in the Colorado Basin have restricted
damsites (except Water District 100), Figure 10-8 shows
that each district has less than 100 AF of potential
storage if repairs were made.
Figure 10-7 shows the locations of potential damsites as
identified by the CWCB in the Colorado Basin, along with
the conditional storage rights locations. Different colored
circles are used to represent the total volume of
conditional rights that each location holds. Potential
damsites are classified by total potential storage.
~~
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