WSP06539

• File Number: 8220.100.50
• Description: CRSP - Power Issues
• Basin: Colorado Mainstem
• Date: 1/1/1983
• Author: West. Sys. Coord. Co
• Title: Western Systems Coordinating Council Ten-Year Coordinated Plan Summary 1983- 1992
• Water Supply Pro - Doc Type: Publication

HydrD conditions were near to above median throughout mDst of
the WSCC region during 1982. As a result of these cDnditions the
hydroelectric energy produced by the U.S. Systems of WSCC was 216,553 GWH,
17.1 percent above that prDjected for 1982, and 17.1 percent greater than
the 184,915 GWH prDduced in 1981.

1
I
I
I
I
I
I
1
I
I
I
I
I
I
I
I
I
I
1

10

Table 2 tabulates on a regional and area basis the projected
firm peak load average annual compound grDwth rates based on the previous
year's actual peak load and the ten-year fDrecast as of January 1, 1973
through 1983. The projected growth rates for the 1982-1992 period reflect
a dDwnward change relative to the growth rates projected last year fDr the
1981-1991 period. During the past eight years the ten-year growth rate
projections have been continually decreasing. Figure 2 depicts the
region's firm peak 1Dad history (1972-1982) and the ten-year projection as
of January 1, 1983. Figure 2 also depicts the January 1974, 1977 and 1980
ten-year projections and graphically illustrates the declining projections
subsequent to the 1973 oil embargo. Tables 3 and 4 summarize the actual
annual firm peak and energy .10ad growth rates for the 1972~1982 period.
Figure 2 and Tables 2-4 reflect the effects of the oil embargo, the
subsequent and continuing conservatiDn effDrts, and the ensuing decrease
in actual and fDrecasted 1Dad requirements. All areas except the Rocky
Mountain Power Area experienced a significant decrease in annual average
compound growth rate for firm peak and/Dr energy 1Dad during the 1973-1981
period as compared tD the 1971-1972 periDd.

The utilities within the WSCC region are taking an active role
in promoting energy conservation programs. This effDrt coupled with
inflation and the increasing price of fuel have prDvided motivatiDn for
reduced load growth. The utilities have recognized these factDrs by
reducing estimates for future power requirements. Prior tD the oil
embargo, peak load and energy requirements were prDjected to increase at
apprDximate1y 7.0 percent per year. The region's current prDjected
average cDmpound grDwth rates for firm peak and energy 1Dads are 3.2
percent and 3.7 percent per year respectively based Dn the actual
requirements for 1982 and thDse projected thrDugh 1992. Figure 2
illustrates that loads are increasing and 'are expected tD continue to
increase, but at a slDwer rate than that projected before the oil embargo.

Table 5 prDvides information regarding the ten-year projection
for summer and winter peak loads, resources, scheduled maintenance/
inoperable capability and reserve capability for the total WSCC region.
The reserves shown for the total WSCC regiDn should not be used to assess
the adequacy of power supply within WSCC as transmission cDnstraints may
limit interarea capacity transfers. Table 6 is a summary of the projected
summer and winter firm peak load growth rates for WSCC and each of its
four major areas. The summer and winter seasons are defined as the
periods of the year between June 1 and September 30, and between
December 1 and March 31, respectively.

A summary of the 1983-1992 firm energy load requirements for
WSCC and its four majDr areas is presented in Table 7. HydrD pumped
stDrage pumping requirements which range from 1,249 GWH to 2,414 GWH per
year and interruptible loads which vary from 2,463 GWH to 5,445 GWH will
increase the energy requirements abDve thDse shown for the WSCC region.
Table 8 summarizes the prDjected energy growth rates.