WRSA: COLLECTION DITCH UPGRADE
Project Name
Partner
Project Manager
Project Manager Contact
WRSA: Collection Ditch Upgrade
Copper Mountain Mine
Brook Webster
bwebster@arrow.ca
(250) 571-6075
Project Award Date
Project Completion Date
October 2021
May 2022
Project Details
Re-building a 1,310m length of the WRSA Collection Ditch channel, including the removal and re-installation of an existing culvert, removal of two existing culverts and installation of a new culvert across the Mine Access Road to the WRSA Collection Ditch, and re-grading of the Mine Access Road to convey flow to the new culvert.
Project Services and Scope
- Establish temporary water management of existing flows within the channel to facilitate construction activities in the dry
- Remove existing channel rip-rap and rip-rap transition fills in a method that enables re-use of the fills
- Excavate the channel to the new design lines, which included re-sloping to 2H:1V. Additional clearing and grubbing
- Prepare channel foundation
- Re-establish elevation, minimum dimensions, and grade of the channel foundation
- Fill low spots with liner bedding
- Establish French Drains out of rip-rap transition fill and construct a revised liner tie in trench
- Place liner bedding, liner, rip-rap and rip rap transition fills
- Re-establish flow into the completed channel
- Excavate and remove existing culverts, place liner bedding and liner beneath culvert and re-install and backfill around new culvert
- Re-grade Copper Mountain Road and re-establish and re-grade Mine Access Road and ditch