Headworks Corrosion Rehabilitation and Addition of Metering Chamber Mount Albert Water Resource Recovery Facility

Location

5866 Doane Road, Town of East Gwillimbury, ON

Client

The Regional Municipality of York Status: In Progress Consultant: Cole Engineering Group Limited

The Work includes, but is not limited to, Headworks Corrosion Rehabilitation and Addition of a Metering Chamber at the Mount Albert Water Resource Recovery Facility located at 5866 Doane Road in the Town of East Gwillimbury, consisting of the following:

.1 Headworks Rehabilitation
The existing Headworks is severely corroded due to a high presence of hydrogen sulfide corrosive wastewater gas. The scope of work includes, but is not limited to:
 Removal and disposal of temporary aluminum floor plates
 Cleaning the existing wastewater channels and vortex grit tanks within the Headworks
 Chipping out deteriorated concrete within the wastewater channels and vortex grit tanks
 Rebuilding the concrete wall(s) profiles, including reinforcement
 Grit blasting and coating of all the channels and tanks with a cementitious corrosion resistant coating
 Supply and installation of stainless steel seating angles along the top of all walls and tanks to support the new covers.
 Removal and disposal of existing channel slide gates
 Supply and installation of new UV-resistant FRP covers on all channels and tanks
 Modifications to the existing concrete inlet chamber, includes: new piping, concrete chipping, and concrete fill, and external excavation
 Supply and installation of davit bases and life safety anchor points to replace the existing corroded items

.2 Headworks Bypass
 In order to facilitate the Headworks Rehabilitation a bypass must be installed from the inlet forcemain to the lagoon manhole. The scope of work includes, but is not limited to:
 Modification of the “splitter” inlet chamber and piping at plant entrance
 Temporary fused HDPE piping from the bypass connection, at the “splitter” inlet chamber, to the existing lagoon manhole
 Temporary fused HDPE piping from the existing lagoon manhole to the existing aeration tanks
 Bypass pumping system installation, monitoring and removal
 Works include excavation, temporary road plates, and roadway repair

.3 Metering Chamber
 Precast concrete metering chamber
 Includes new magnetic flowmeter, installation and calibration
 Includes installation of meter complete with power and signal, SCADA signal termination of meter into existing on-site PAC Panel
 Includes excavation and roadway repair.
 Removal of the existing 350mm diameter magnetic flow meter located in the headworks building, to be cleaned and returned to the Region, and supply and installation of a spool piece.