FLOOD03331

• County: Gunnison
• Community: Uncompahgre Valley
• Basin: Gunnison
• Title: Uncompahgre Valley Reclamation Project - Hydropower - Part 3 - Environmental Impact Statement DRAFT
• Date: 4/19/1989
• Floodplain - Doc Type: Project

CHAPTER 2

ALTERNATIVES INCLUDING
PROPOSED ACTION

outcrops protrude outward from the walls and ceiling which
restrict the tunnel's hydraulic capacity. Tunnel sections and
dimensions are described in table 2.2.

The UVWUA has been engaged for the past several years in a
Rehabilitation and Betterment (R&B) Program to repair and

Table 2.2.--Description of Gunnison Tunnel sections

Percent of
tunnel length

Description

Section

A

38.5

Floor lined, walls and ceiling unlined.
Width varies from 11.0' to 14.5', and
height varies from 11.3' to 14.3'.
Walls are generally rough with numerous
projections into flow area.

B

6.7

Floor and walls lined to Tunnel spring
line. Width varies from 9.3' to 11.5';
height to spring line varies from 7.0'
to 11.5', as constructed. Some
sections showing evidence of erosion
behind walls.

C

8.0

Floor and walls lined to Tunnel
ceiling. Height and width are same as
section A.

D

21.1

Floor and walls lined to ceiling.
Vertical walls, with partially lined
arch ceiling. Width varies from 9.0'
to 11.5', and wall height varies from
11.0' to 11.7'. Timber beams exposed
in some sections.

,E

15.6

All surfaces are lined. Sidewalls are
sloping and flat, and ceiling is
arched. Width varies from 9.0' to
11.5', and height varies from 11.0' to
11. 7' .

F

10.1

All surfaces are lined and smooth.
Section is horseshoe-shaped with an
arched floor. Maximum height of
section is 10.0 feet.

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