Transcript Winnipeg’s Water Treatment Plant

Treating Our Water…Right!
Winnipeg’s
Water Treatment Program
Agenda
Introduction
History of Winnipeg’s Water Supply
Council’s Decision to Treat Winnipeg’s Water
Why treat our water?
What have we done so far?
What will the new water treatment plant be like?
What challenges remain?














Environmental Issues
Organizational Issues
Market Conditions
Schedule
Finances
Risk Management
Questions
2
History
Winnipeg River
Natalie Lake
ONTARIO
Pinawa
Winnipeg
Assiniboine
River
Deacon Reservoir
Ross
Falcon Lake
Shoal Lake
Watershed
Intake Boundary
Kenora
Main Aqueduct
Red River
SHOAL LAKE
(Indian Bay)
McPhillips Reservoir
and Pumping Station
MANITOBA
Tache
Booster
Station
MINNESOTA
Bra
nch
I
Wilkes Reservoir and
Hurst Pumping Station
MacLean Reservoir
and Pumping Station
Deacon Reservoir
and Booster Station
Main
Aqueduct
Branch II
Existing Water Supply System
Figure 3-1
exsys2bw
0512_cgs
3
History
4
History
5
History
Ri
ve
r
Perimeter Highway
101
WINNIPEG
City Limits
Dugald
McPhillips Res.
ver
ine Ri
o
b
i
n
i
s
As
Wilkes Res.
15
Bra
nch
207
I
MacLean
Res.
206
Shoal Lake Aqueduct
(1919)
Branch II
Red
ay
100
y
wa
d
H
ter
loo
e
F
r
rim
ve
Pe
i
R
d
e
R
96 km to
Shoal Lake
w
igh
Cell 1
Cell 2
(1972) (1978)
1 Tran
sC
an
ad
aH
igh
wa
y
Cell 3
6
Cell 4
(1997)
History
The GWWD Railway was constructed between
1913 and 1915
Aqueduct construction was completed in
March, 1919 – 2500 workers at peak
Since 1919, Winnipeg has enjoyed a high
quality reliable water supply from Shoal Lake
- minimal treatment (chlorine for
disinfection prior to 1937, and fluoride for
dental protection since 1956)
Recently, fluoride was relocated to Deacon,
and orthophosphate was added for lead
control
7
Council’s Decision
In 1993 Council
Accepted the recommendation to undertake water
treatment within a ten year time frame
And established a Water Treatment Reserve
Between 1995 and 1999 a comprehensive program of
monitoring, pilot testing and engineering studies was
undertaken
In 2000, Council adopted a recommendation that
Winnipeg proceed with a water treatment program
This decision was supported by public consultation,
public health officials and the opinion of an “expert
panel” (low risk – high consequence)
8
Why Treat Our Water?
Water treatment is about protecting Public
Health
“The rationale for construction of a water
treatment plant is based primarily on health
concerns” …. Dr. Margaret Fast
“Providing water that is safe and healthy to
drink” received the highest priority …. March
1999 Customer Survey
9
Specific Objectives
Reduce the risk of a waterborne disease
outbreak caused by chlorine-resistant
microorganisms
Reduce chlorine disinfection byproducts
Meet the Canadian Drinking Water
Quality Guidelines
10
Waterborne Pathogens - “Da Bugs…”
Chlorine is effective
against bacteria and
viruses
Chlorine is relatively
ineffective against
Giardia and requires high
doses and long contact
times
Chlorine is not effective
against Cryptosporiduim
11
Our New Water Treatment Plant
A new Water Treatment
Plant is being built at
the Deacon Reservoir
Site.
The plant will be a
state-of-the-art,
modern facility designed
for performance, safety,
and environmental
sustainability.
12
AERIAL VIEW FROM SOUTH WEST
13
VIEW FROM SOUTH EAST
14
Plant Design Life and Capacity
Water Treatment Plant Design Life
projected to be 2040
Maximum Finished Water
Production – 400 ML/d
Average Finished Water
Production – 254 ML/d
Minimum Finished Water
Production – 100 ML/d
15
Location of the Water Treatment Plant
16
What’s New at Deacon?
Ultraviolet light disinfection
New treatment facility, clearwell and
ancillary buildings (Stand-by power,
chemical storage and on-site sodium
hypochlorite generation)
Settling ponds and a new pipe to
transport wastewater from the plant to
the City’s sewer system
24-hour monitoring and security
17
What We Have Done So Far
Tested a number of water treatment
technologies and found the combination
that works best for Winnipeg’s water
Completed Concept and Preliminary
design for the water treatment plant
Detailed Design is underway,
concurrent with construction
18
Early Ultraviolet Light Disinfection
The water will pass
through large pipes
containing ultraviolet
lamps.
The ultraviolet light
will make waterborne parasites, such
as Cryptosporidium,
harmless
19
Ultraviolet Light Disinfection
20
Ultraviolet Light Disinfection
21
Need for Multiple Barriers
“What the experts and the industry recommend with
respect to the treatment of all surface water is a multibarrier approach. The first barrier is watershed
protection to ensure the best possible raw water source.
The next barrier is optimization of the plant processes
designed to achieve settlement of particulates and
sediment in the raw water. The third barrier is
maximization of the efficiency and monitoring of the
filtration process which follows sedimentation. The final
barrier is to ensure the water is adequately
disinfected.”[1]
[1] Justice Robert D. Laing, Commissioner, Report of the Commission of the Inquiry into matters
relating to the safety of the public drinking water in the City of North Battleford,
Saskatchewan. March 28, 2002
22
The Water Treatment Process
23
Settling Ponds
Algae and other solid
material will be removed
from the water and put in
the ponds.
The water will be
separated from the solid
material.
The solids will be removed
from the ponds every year
and hauled to Brady Road
Landfill.
We do not expect any
odour from the ponds.
24
Location of Settling Ponds
New Water Treatment Plant
1
2
4
3
25
What are the Challenges?






Environmental Issues
Organizational Issues
Market Conditions
Schedule
Finances
Risk Management
26
Environmental Effects Assessment
An Environmental Effects Assessment study of
the effects the water treatment plant on the
environment and surrounding community
identified no adverse effects.
The study was voluntary – it is not required by
our regulators.
The results were shared with stakeholders and
Manitoba Conservation.
The facility will be a zero discharge operation it will not discharge to the environment.
Two Public Open Houses have been held in
Springfield;
All substantive issues have been addressed.
27
Organizational Issues
This is a large complex project with four major
consulting firms working from geographically
diverse locations
Coordination/communication through
“ERoom”
Construction Management and “Fast Tracking”
leads to risks and cultural issues for City and
Consultants
Hiring and training of certified operators in
time for commissioning and start-up (2008 by
Council mandate) will be challenging
28
Market Conditions
Many large new projects will be going
to market over the scheduled
construction period
A period of high inflation within the
construction industry is forecast (time =
money)
A shortage of qualified contractors and
personnel is anticipated
We must make this an attractive project
for contractors
29
Schedule
April 2005
Finish preliminary design
and environmental effects
study
Spring 2005
Started building the water
treatment plant
Fall 2008
Start testing the plant
End of 2008
Begin operating the plant
30
Construction Activities
Progress to date:
•
•
•
•
•
•
Long Delivery Valves and process equipment have been prepurchased
Some piling has been prepurchased
Bulk Excavation for the WTP and the Clearwell has been completed
Construction of Yard piping, Clearwell and Raw Water Pumping Station
are underway.
About $40 Million in work awarded
Overall, we have committed about $78 Million to date
Upcoming Work:
•
•
•
•
WTP Concrete and Piling (Construction) - $55.9M
Freeze Thaw Ponds and related infrastructure - $6.9M
Mechanical and Electrical - $38.5 Million
Miscellaneous equipment, piping and infrastructure - $10 M
31
Finances
The original water treatment program budget
was $214 million to build the WTP and $12.75
million/yr to operate
Council has approved an additional $13.3
million for risk mitigation initiatives and $2.8
million for shops/staff consolidation
The current rate model will provide about of
$117 Million in cash financing
Once the plant is up and operating, revenues
from water sales are sufficient to cover
operating and debt servicing without
extraordinary increases to water rates
32
Risk Management
This project conforms to new civic policies on
Risk Management
A two-day Risk Management Workshop was
undertaken, using a specialist consultant
120 risk items were identified by workshop
attendees
These were synthesized into 44 project issues
and 33 design issues by the Risk Consultant.
Some of the risks are “Serious” to “Critical”
Further refinement; mitigation and monitoring
protocols have been developed; risks are
monitored on an ongoing basis and reviewed at
monthly meetings
33
Questions?
34