town of penetanguishene payette reservoir upgrades
TRANSCRIPT
Welcome and Introductions
C.C. Tatham & Associates Ltd.:
Rod Langford, C.E.T., Project Manager
Suzanne Troxler, M.Sc., P.Eng., Manager – Environmental
Engineering
Town of Penetanguishene:
Bryan Murray, P.Eng., Director of Public Works
Moe Lefaive, C.Tech., Chief Operator, Water Division
2
Project Purpose
Implement recommendations of 2012 Class EA Study.
Replace aging drinking water reservoir at Payette
Drive.
3
Existing Drinking Water System
Payette DWS:
3 groundwater supply wells
3 water reservoirs (1 on-site, 2 off-site)
1 pump house
4 pressure zones
Water Storage:
Payette Drive Reservoir
Robert Street West Reservoir
Centennial Drive Elevated Tank
4
Constructed in 1910 (104 yrs old)
Above-grade, earth berm around it
1,100 m³ capacity
Payette Drive Reservoir
Constructed in 1931 (83 yrs old)
Partially above-grade
1,100 m³ capacity
Robert Street West Reservoir
Constructed in 1993 (21 yrs old)
Entirely above-grade/elevated
5,000 m³ capacity
Centennial Drive Elevated Tank
2012 Class EA Study
Payette Drive and Robert Street West reservoirs
approaching end of life.
Need to be replaced to prevent failure and loss of
service.
Preferred solution is to construct new reservoir at
Payette Drive site.
Then decommission Payette Drive and Robert Street
West reservoirs.
9
Preliminary Design of Upgrades
Existing Payette Drive reservoir is 15.5 m diameter
and 6.5 m high.
Cast-in-place concrete, above-grade and bermed
with earth all around.
No redundancy. Difficult to service without taking
off-line, causing service interruptions.
New Payette reservoir capacity: 2,200 m³
(combined capacity of existing Payette Drive and
Robert Street West reservoirs).
10
Preliminary Design of Upgrades
Two above-grade reservoirs, each 12.8 m diameter
and 8.5 m high, 1,100 m³ capacity (2,200 m³
total).
Proposed location is generally behind existing
reservoir berm.
Also replacing existing 104 year old supply water
main from existing reservoir to Church Street. Has
reached end of life. Needs to be replaced to
prevent failure and loss of service.
11
Proposed Payette DWS Site
Reservoir
Well No. 3
Well No. 2
Well No. 1
Proposed
Reservoirs
Pump House
Supply Water Main
Replaced in Same Location
Benefits of Proposed Reservoirs
Glass-coated steel construction. Requires very little
exterior maintenance.
Not bermed around. Easier access for inspection,
maintenance and repair.
Two reservoirs allows one to remain in service if
other is off-line, providing uninterrupted water
supply.
2 m of additional height improves operating
pressure in lower zones.
19
Benefits of Proposed Reservoirs
Reduces overall operating costs.
Optimized site layout: less excavation and piping,
few changes to green and open spaces.
Limited and short-term interruptions to water supply.
20