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
