FLOOD02242

• County: Gunnison
• Community: Uncompahgre Valley
• Basin: Gunnison
• Title: Uncompahgre Valley Reclamation Project - Hydropower - Part 1 - Final Environmental Impact Statement
• Date: 8/28/1990
• Floodplain - Doc Type: Project

2.9

2.10

2.11
2.12
2.13
2.14

2.15

TABLE OF CONTENTS--Continued

TABLES (Continued)

Monthly average flows entering AB Lateral
Hydropower Facility in ft'/s.
(Alternative E--950-ft'/s turbine capacity,
no Tunnel modifications) .......
Monthly average flows entering AB Lateral
Hydropower Facility in ft'/s.
(Alternative F--1,135-ft'/s turbine
capacity, no Tunnel modification, with
de-icing flows) ...........
Summary of characteristics, alternative G
Summary of minimum flow alternatives
Summary comparison of alternatives
Alternative cost data and financial
feasibility analysis (in $1,000)
Impacts of alternatives . . . . . .

Page

54

55
63
68
72

73
74

CHAPTER 3

AFFECTED ENVIRONMENT AND ENVIRONMENTAL CONSEQUENCES

3.1

3.2

3.3
3.4

3.5
3.6

3.7

3.8

3.9

3.10

Simulated flows in the Gunnison River
below Crystal Reservoir (ft'/s)
Average monthly flows (ft'/s) entering
the Black Canyon for alternative A
(no-action) condition (1952-1983)
Simulated flows in the Uncompahgre
River below Colona (ft'/s)
Average monthly flows (ft'/s) at
various locations along the Uncompahgre
River (alternative A)
Peak discharges for area streams (ft'/s)
Average monthly flows in the Gunnison
River entering the Black Canyon for each
alternative (ft'/s) ... .
Flows entering the Black Canyon (ft'/s).
(Alternative A--no-action conditions)
Flows entering the Black Canyon (ft'/s)
(Alternative B--1,135-ft'/s turbine capacity,
no Tunnel modifications) .. .....
Flows entering the Black Canyon
(ft'/s). (Alternative C--1,135-ft'/s turbine
capacity and 1,300-ft'/s Tunnel capacity)
Flows entering the Black Canyon (ft'/s).
(Alternative E--950-ft'/s turbine capacity,
no Tunnel modifications) ...........

viii

86

87

88

89
90

92

94

95

96

97