Ministry of Water, Land and Air Protection - Effectiveness Evaluation and Monitoring for Dietrich Creek Culvert Replacement 6500 Road

Dietrich Creek Culvert Replacement 6500 Road

Objectives

To replace two culverts acting as barriers to fish passage.

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 9 km on the 6500 Road in the Boss Creek watershed. Dietrich Creek is the main input into Hendrix Lake.

Introduction

Dietrich Creek is the main tributary to Hendrix Lake and therefore acts as the headwaters for the Hendrix Creek watershed. Rainbow trout are found in the stream.

Assessments and Prescriptions

This site was listed as the highest priority for restoration in the Boss/Deception fish passage-culvert inspection report. Two culverts at the crossing had high water velocities (1.5 m/s) and outfall drops (15 and 48 cm) (fig 5-1).

The stream channel is 4.5 meters wide requireing that a clear span structure be used to provide for fish passage.

Rehabilitation Work

Water was diverted into the smaller of the two existing culverts while the large was removed and the channel reconstructed (fig. 5-2).
Silt fences were placed downstream during all phases of construction to maintain water quality during installation.

Structure Details

11 meter concrete deck bridge (fig. 5-3)
2% slope to bridge deck
precast concrete footings
reconstructed stream channel approximately 5 meters wide

Cost Summary

Bridge design, supply and install $47,841

Riprap, site plans and supervision $5,990

Total $53,831

Environmental Benefits

2.6 km of stream are now accessible to Rainbow Trout.

For Further Information Contact:

Ken MacKenzie
P.O. Box 97
Weldwood of Canada Ltd.
100 Mile House Operations
100 Mile House, BC
V0K 2E0
Tel. (25

Figure 5-1. Culverts prior to replacement.

Figure 5-1. Culverts prior to replacement

Figure 5-2 Channel bypass.

Figure 5-2 Channel bypass.

Figure 5-3. Completed installation.

Figure 5-3. Completed installation