9593

• UCREFRP Catalog Number: 9593
• Author: Tetra Tech Inc.
• Title: Concept Development Report Hartland Diversion Dam Fish Passage Structure Delta, Colorado.
• USFW Year: 2000.
• USFW - Doc Type: Grand Junction, CO.
• Copyright Material: NO

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6.3.1 Alignment
The alignment of the fish and boat passage runs through the center of the river,
including the boater entrance to the plunge pools. Large boulders are proposed to mark the
boater passage. The installation of the fish and boater passage requires the removal of the
small island located immediately downstream of the existing dam.
The construction of this alternative may disturb existing wetlands located downstream
of the existing dam on the island as well as both banks.
6.3.2 Elevations
The elevations for this alternative must maintain the water levels at the Hartland Ditch
headgate and connect to the downstream channel bed. The alternative is shown as a series of
two drops, each dropping in 6-inch sequences. The upstream drop includes three 6-inch
drops, and the downstream drop includes four 6-inch sequences. Flow characteristics in the
chutes and pools for the range of river flows being evaluated are calculated in conjunction with
the hydraulic analysis of the alternative presented in Section VII. Table 7.2 summarizes the
results.
6.3.3 Access
Access to the fish and boat passage structure could be from either side of the river.
Access from the east side would be as described in Alternative I and is preferred since access
from river right requires descending very steep river banks.

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