Didsbury Landfill - Cell VI Construction and Class III Cell Capping

Client: Mountain View Regional Waste Management Commission

Consultant: Parkland Geo-Environmental Ltd.

Start Date: April 2016

Completion Date: July 2016

Project Scope:  

Part One: Cell VI – Construction

• Excavated and stockpiled topsoil, clay and other native soil from Cell VI – 30,000 m³

• Excavated and disposed of municipal solid waste from Cell VI – 5300 m³

Part Two: Cell VI – Liner System

• Subgrade prep to 150 mm depth at 100% SPMDD – 22,550 sq.m

• Clay liner 600 mm thick at 98% SPMDD at 2-4% above optimum MC – 22,550 sq.m

• 80 mil HDPE liner supply and install, includes cleaning and fusing to existing liner – 22,550 sq.m

• Liner protection geotextile supply and install – 22,550 sq.m

Part Three: Cell VI Leachate Collection System

• Supplied and installed perforated PVC leachate pipe, including washed rock and geotextile wrap – 250 lm

• Supplied and installed 150 mm solid PVC leachate trunk line along eastern edge to new manhole; included operator valve, tied into existing manhole, trenching, backfill and associated works – 40 lm

• Supplied and installed new leachate collection manhole; Includes excavation, backfill, operator valve, clean out wye with pipe, suction pipe, fittings and other associated works

• Placed tire shred drainage layer - 450 mm thickness – 21,400 sq.m

• Supplied and installed tire shred filter geotextile layer – 21,400 sq.m

Part Four: Cell VI Subdrains

• Supplied new subdrain manhole

• Installation of subdrain manholes, includes excavation, backfill, gravel base pad and associated works

• Supplied and installed eastern and western subdrains. Includes trench excavation, backfill, drainage rock and geotextile wrap – 210 lm

Part Five: Cell VI Roads

• Strip and salvage existing gravel

• Subgrade prep to 150 mm depth at 100% SPMDD – 2575 sq.m

• Installed salvaged gravel as sub-base, supplied and installed sub-base gravel, Supply and install base gravel – 2575 sq.m

Part Six: Class III Cell Capping

• Subgrade grading – 20,900 sq.m

• Clay cap placement 600 mm thick at 98% SPMDD at 2-4% above optimum moisture content – 12,540 m³

• Subsoil placement 350mm thick at 95% SPMDD – 7320 m³

• Topsoil placement 200 mm thick – 4180 m³

• Seeding – 20,900 sq.m