WSP01221

• File Number: 8200.760
• Description: Yampa River General
• State: CO
• Basin: Yampa/White
• Water Division: 6
• Date: 12/22/1993
• Author: Unknown
• Title: Refinements of Environmental Baseline and Contemplated Draft Model Runs - December 22 1993
• Water Supply Pro - Doc Type: Report/Study

. '

· OGiJ183

Results of Additional Model Runs

December 22, 1993
Page 3

JUNIPER PROJECT

The operating assumptions for the Juniper Project (for the Contemplated Draft scenarios)
are as follows:

1) the three 1954 water rights for Deadman Bench (550 cfs), the power plant
(1000 cfs) and storage (844,294 at) are represented, The storage
decree is reduced by carryover on the start-fill date

2) Juniper Reservoir has a total capacity of 844,294 af with dead storage of
73,226 af (this dead storage means that carryover will almost always be
at least 73 kaf thus the storage decree will probably never take more
than 771 kat)

3) as between the three Juniper rights, the Deadman Bench right takes available
water first and the storage right takes water last

4) releases from storage are made to supplement the Deadman Bench
agricultural demand (121 kat) and a 1000 cfs power plant discharge

5) there is no refill storage right

RESULTS OF CONTEMPLATED DRAFT SCENARIOS

Scenario 13: Unsubordinated Draft of Juniper Rights

This scenario operates the Juniper Project in its 1954 priority position, Upstream
demands are represented at their current (or" 1989 potential ") levels, including the Hayden and
Craig stations, and utilize their existing water rights, Thus the contemplated draft derived with
this scenario represents the river draft that might be expected were the original Juniper project
in existence today and operated using its 1954 water rights without regard to any specific or
general subordinations,

The total draft of the Juniper rights averages 866,717 aftyr in this scenario, The
attached graphs show end-of-month contents in the three modeled existing reservoirs, the
distribution of the Juniper draft over the 53-year study period, and the average monthly
distribution of the components of the Juniper draft.

There are substantial water shortages throughout the basin in this scenario as the Juniper
rights call out many existing juniors, including the reservoirs,

Scenario 14: Fully Subordinated Draft of Juniper Rights

This scenario operates the Juniper Project in a fully subordinated priority position (i.e"
most junior of all modeled water rights). Upstream demands are represented at their current
levels, including the Hayden and Craig stations, and utilize their existing water rights, The
contemplated draft derived with this scenario represents the river draft that might be expected
were the original Juniper project in existence today and operated using its 1954 water rights in
accordance with all specific and general subordinations,

Hydrosphere Resource Consultants 1002 Walnut Suite 200 Boulder, Colorado 80302

li_-,,,_~