WSP10457

• File Number: 8282.600.10
• Description: Colorado River Operating Annual Reports
• Basin: Colorado Mainstem
• Date: 1/1/1989
• Author: USDOI/BOR
• Title: Operation of the Colorado River Basin 1989 Projected Operations 1990
• Water Supply Pro - Doc Type: Publication

UPPER BASIN RESERVOIRS

FONTENELLE RESERVOIR
(GREEN RIVER)

Water Year 1989

After five years of filling restrictions due to dam safety
concerns, the construction of a concrete cutoff wall in
Fontenelle Dam is now complete, and the reservoir was
refilled by the end of July 1989. The reservoir started water
year 1989 at elevation 6442,6 feet, with an active storage of
32,100 acre-feet.

The January 1, 1989 forecast of April through July runoff was
750,000 acre-feet, or 89 percent of the long-term average, The
forecast continued to decline through the spring runoff until
on June 1, it was 411,000 acre-feet, or 49 percent of average,

ACTUAL RELEASES

WY 1989

1000 cra
.

4

.

.

00 N D J F M A M J J A S 0

The elevation of Fontenelle Reservoir peaked at 6505.64 feet
on July 30-31, 1989, A peak inflow of 5,031 cfs was observed
on JUDe 18, 1989,

The actual April through July runoff into Fontcnelle
Reservoir was 518,000 acre. feet which was 61 percent of
average, Inflow for the entire 1989 water year was 768,000
acre-feet or 65 percent of average, The total release from
Fontenelle Dam for water year 1989 was 498,000 acre-feet, of
which 247,000 acre-feet bypassed the powerplant.

FONTENELLE RESERVOIR

Reservoir

Acre.feet

Elevation, feet

Maximum Storage
Rated Head
Minimum Power
Surface Area, full
Reservoir Length, full

344,834
233,789
194,%2

6,506
6,491
6,485
8,058 Acres
18 Miles

Powerplant

Number of Units
Total Capacity

1
10,000 KW

5