WSP03640

• File Number: 8220.114.J
• Description: Dolores Participating Project
• State: CO
• Basin: San Juan/Dolores
• Water Division: 7
• Date: 5/1/1984
• Author: USDOI-BOR
• Title: Planning Report - Concluding the Study on CRSP Power Peaking Capacity - Dolores Pumped-Storage Unit - Colorado
• Water Supply Pro - Doc Type: Report/Study

CHAPTER II

NEEDS AND RESOURCES

Projected Power Needs

Demands for additional peaking power, together with the rising cost
and dwindling supplies of fossil fuels, have made it necessary to further
develop efficient, renewable peaking power resources such as hydro-
electric power facilities. Throughout the Colorado River Storage Project
service area,"};..! additional generating capacity will be needed to help
meet future requirements for power at peak demand periods even with
conservation measures and such nonstructura1 management measures as a
redistribution of existing demand patterns and a time-of-day pricing
structure.

A Reclamation survey of power needs in the Colorado River Storage
Project service area identified the need for increased peaking power
capacity. The survey was conducted as part of the 1975 power peaking
reconnaissance study by a power resources and needs subteam, a component
of the planning team organized to aid in the study .process. The survey
and other analyses developed by the subteam are documented in detail in
the 1978 Peaking Power Status Report, Appendix, Volume 2 of 2. Load and
energy projections derived from the report are presented in the table
below and reflect the effects of conservation measures, interregional
interties, and changes in rate schedules.

Colorado River Storage Project marketing area load and energy
projections cumulative totals from all load centers!1
Power projections
1990
33,131
170.3
8.0
2.2
10,834
6,759
2,300
810
5.1
3.0
9,293
28
1,570
0.59

1975
12,680
63.3
2.8
.8
4,071
2,562
2,200
800
1.8
2.8
3,493
27
1,500
0.57

1985
25,309
129.5
6.1
1.7
8,276
5,188
2,320
830
3.9
3.0
7,099
28
1,570
0.58

1995
42,409
218.9
10.2
3.1
13,825
8.948
2.300
880
6.6
3.0
11,969
28
1,580
0.59

2000
54,117
2M.4
13.3
3.9
17.740
11,365
2,340
880
8.6
3.1
15.261
28
1,580
0.59

Total capacity requirements (MW)~I
Annual energy (KWh x 106)
Maximum peaking energy (KWh x 106)
Hinimum peaking energy (KWh x 106)
MaxiMUm peaking load (MW)
Minimum peaking load (MW)
Maximum peaking hours
Minimum peaking hours
Estimated peakins energy (KWh x 106)11
Estimated percent of annual energy
Estimated peaking load (HW)
Estimated petcent of annual peak demand
Eatimated peaking hout~1
Annual load factor1!
Explanation: HW - megawatt, h - hout.
Soutce: U.S. Bureau of Reclamation, Peaking Power Status Report Appendix, Volume 2 of 2, 1978.
1/ Time of occurrence for peak loads varied slightly among load centers; however, it was assumed that
the variation in individual hours reported would not affect the totals estimated for annual peak demand and
annual schedule.
21 Totsl demand including base 8S well as peak.
31 Average of maximum and minimum range of peaking energy.
4/ EstiMated number of hours per year that peaking occ~rs.
1/ Ratio of average load to peak load.

1/ The Colorado River Storage Project service area for planning
purposes includes the States of Colorado, New Mexico, Arizona, Utah, and
Wyoming in their entirety; all or portions of six counties in Nevada;
and the State of California east of long. 1150.

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