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
10.1.5.3 Dolores/San Juan/San Miguel
Summary of Conditional Storage Rights
To portray the conditional storage rights present in the
Dolores/San Juan/San Miguel Basin, the area was
described using water districts as shown in Figure 10-9.
The 15 water districts in the Dolores/San Juan/San
Miguel Basin can also be described using the main
stream systems, which are shown in Table 10-7.
Table 10-7 Dolores/San Juan/San Miguel Basin Water
Districts, Subbasins and Associated Stream Names
30 Animas Animas River
31 Pine Los Pinos River
32 McElmo McElmo Creek
33 La Plata La Plata River
34 Mancos Mancos River
46 Pine/San Juan Navajo Reservoir/San Juan
River
60 San Miguel San Miguel River
61 Dolores Dolores River
69 Dolores Disappointment Creek
77 San Juan Navajo River
78 San Juan Piedra River
Various water districts in the Dolores/San Juan/San
Miguel Basin contain conditional storage rights, with one
conditional right in Water District 33 dating back to the
early 1900s. As shown in Table 10-8, there are
1,600,000 AF of conditional storage rights in the basin.
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 District 30 in the Dolores/San Juan/San Miguel
Basin has the largest volume of conditional storage
rights. This is depicted in Table 10-8 and also presented
graphically in Appendix H. This water district includes the
Animas-La Plata Project conditional water rights, and a
modified and much reduced size of the project is under
construction.
Figure 10-10 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 1940 to 1960 time period.
A map of the locations of the conditional storage rights in
the Dolores/San Juan/San Miguel Basin is shown in
Figure 10-11. Different colored circles are used to
represent the total volume of conditional rights that each
location holds. This figure also shows the locations of
potential damsites in the Dolores/San Juan/San Miguel
Basin, as discussed in Section 10.1.5.4 below.
As described in Section 7, the development of existing
conditional water rights, including the Animas-La Plata
Project, would result in less available water for the rest of
the basin.
10.1.5.4 Dolores/San Juan/San Miguel
Summary of Restricted R~servoirs and
Potential Storage Sites
Several restricted reservoirs exist in the Dolores/San
Juan/San Miguel Basin and are listed in Table 10-9. The
total volume of restricted storage in the basin is 1,301 AF
and rehabilitation of all of these reservoirs will not
significantly improve the availability of supply.
Figure 10-12 also shows these data graphically. Besides
Water District 34, few other water districts in the
Dolores/San Juan/San Miguel Basin have restricted
reservoirs. Figure 10-12 shows that Districts 60, 63, and
68 each have less than 300 AF of potential storage if
repairs were made.
Figure 10-11 shows the locations of potential damsites
as identified by the CWCB in the Dolores/San Juan/San
Miguel 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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