FLOOD03642

• County: Routt
• Community: Oak Creek
• Stream Name: Oak Creek
• Basin: Yampa/White
• Title: Flood Hazard Identification Report
• Date: 9/1/1986
• Prepared For: Oak Creek
• Prepared By: CWCB
• Floodplain - Doc Type: Floodplain Report/Masterplan

1,315.5 MW for the planned installed capacity of the CRSP plants, including
the Central Utah Project plants, 600 MW for Colorado-Ute (Ute) and Salt
River Project (SRP) and 35 MW for Navajo Tribal Utility Authority (NTUA).
Dividing the cost of $8,968,000 by the capacity of 1,986,500 kW resulted in
a unit cost of $4.51 which was rounded to $4.50 per kW-year for the
established firm transmission rate. At an annual load factor of 58.2
percent the rate would be about 0.9 mills per kWh. A rounded figure of 1
mill per kWh was used as the nonfirm transmission rate.

The firm transmission rate was raised to $6.60 per kW-year in May
1974. It was based on the average of the estimated annual costs per
kilowatt for the years FY 1975, 1976, and 1977. The aforementioned 3-year
estimated average annual transmission costs were $10,453,000 as of May 1974,
which were comprised of the annual amortization and OM&R costs of the CRSP
transmission system expected to be in-service plus the estimated costs of
wheeling over other systems, less estimated rental revenues due from others
for use of CRSP facilities, less the estimated revenue for wheeling power
for Ute and SRP. The 3-year average annual transmission capacity
commitments were 1,580.7 MW, which consisted of 1,195.4 MW for the installed
capacity of the CRSP plants and 385.3 MW for Ute and SRP. Dividing the
average annual cost of $10,453,000 by the capacity of 1,580,700 kW resulted
in a unit cost of t6.61 which was rounded to $6.60 per kW-year for the
established firm transmission rate. The nonfirm transmission rate of 1 mill
per kWh was not revised.

The firm transmission rate was raised to a rate of $10.27 per kW-year
in April 1983. It was based on the average of the estimated annual costs
per kilowatt for the years Fy 1982, 1983, and 1984. The aforementioned
3-year estimated average annual transmission costs were $17,630,000 as of
the end of FY 1981, which were comprised of the anticipated transmission
system investment and OM&R costs, plus the costs of wheeling over other
systems, less revenues for rental of CRSP transmission facilities, less
revenues from Ute and SRP because of the exchange of Ute and SRP coal-fired
generation for CRSP hydro generation. The 3-year average annual
transmission capacity commitments were 1716.3 MW. Dividing the average
annual cost of $17,630,000 by the capacity of 1,716,300 kW resulted in a
unit cost of $10.27 per kW-year for the established firm transmission rate.
At an annual load factor of 58.2 percent the nonfirm transmission rate would
be about 2.0 mills per kWh. The nonfirm transmission rate was also raised
from 1 to 2 mills per kWh in April 1983.

V. PROPOSED TRANSMISSION RATES

Based on data available as of September 1, 19B5, projections were made,
as shown on Table 1, for the 3 ensuing years of FY 1986, 1987, and 1988 as
to the anticipated transmission system investment and OM&R costs; costs of
wheeling over other systems; revenues for rental of CRSP transmission
facilities; and revenues from Ute and SRP because of the exchange of Ute and
SRP coal-fired generation for CRSP hydro generation. Table 1 also shows the
estimated transmission capacity commitments and the annual cost per kW for
each of the 3 future years FY 1986, 1987, and 1988. The average cost per kW
for the 3 years, $15.94 per kW-year, is proposed as the firm transmission
rate. A new nonfirm transmission rate of 3.1 mills per kWh is' also
proposed. The energy rate of 3.1 mills per kWh is obtained by applying an

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