Unnamed Stream 100 Road Bridge Site

Objectives:

To replace a barrier to fish passage created by two culverts with a bridge.

FRBC Region/ MELP Region/ MoF Region:

Cariboo-Chilcotin/Cariboo/Cariboo

Author:

Ken MacKenzie

Proponent:

Weldwood of Canada Ltd.100 Mile House Operations

Location:

The site is located at 11.5 km on the 100 Road in the Eagle Creek watershed. The unnamed stream flows from Peach Lake into Oie Creek.

Introduction:

Rainbow trout and other non-gamefish species are found in the stream.

Assessments and Prescriptions:

The fish passage-culvert inspection report completed for the Eagle Creek Watershed identified this site as the second priority for restoration. Water velocity through the crossing structures was 1.8 m/s and a 15 cm outfall drop existed (fig. 7-1).The stream width at the site (over 3.5 meters) meant that a bridge was the best option to restore fish passage.

Rehabilitation Work:

• A bypass channel was constructed and armoured to accommodate the stream during culvert removal and channel reconstruction (fig. 7-2).
• Silt fences were installed downstream during all phases of construction to maintain water quality
• An environmental monitor was on site for all phases of construction.

Structure Details :

• 11 meter concrete decked bridge (fig. 7-3)
• precast concrete footing and steel towers
• reconstructed channel width 4 meters

Cost Summary:

• Bridge design, supply and install $46,780
• Riprap, site plan and supervision $11688
• Total $58,468

Environmental Benefits: 4.25 km of additional habitat are now available to fish.

For Further Information Contact:

Ken MacKenzie
P.O. Box 97
Weldwood of Canada Ltd.
100 Mile House Operations
100 Mile House,
BCV0K 2E0
Tel. (250)395-8200

Figure 7-1. Culverts prior to replacement:

Figure 7-3. Final installation:

Figure 7-2 Preparing bypass channel: