Report to / Rapport au:
and Council / et au conseil
27 April 2011 / le 27 avril 2011
Submitted by / Soumis
par: Nancy Schepers, Deputy City Manager /
directrice municipale adjointe, Infrastructure Services and
Community Sustainability /
Services d’infrastructure et Viabilité des collectivité
Contact Person / Personne-ressourc
: Dixon Weir, General Manager,
Environment
Services Ext. 22002, dixon.weir@ottawa.ca
|
Ref N° : ACS2011-ICS-ESD-0021 |
SUBJECT:
|
WOODROFFE
TRANSMISSION WATERMAIN REPAIR UPDATE
|
OBJET:
|
MISE À JOUR SUR LA RÉPARATION DE LA CONDUITE DE
DISTRIBUTION DE L’AVENUE WOODROFFE |
REPORT RECOMMENDATIONS
That
Council:
1.
Receive the information in this report regarding the
implementation of an immediate, mandatory ban on all outdoor water use in Barrhaven,
Riverside South and Manotick enacted today by the Deputy City Manager of
Infrastructure Services and Community Sustainability in order to fulfill the
City’s responsibilities under the Safe Drinking Water Act 2002;
2.
Approve the implementation of the suite of measures outlined
in this report designed to support voluntary compliance with the outdoor water
use ban;
3.
Approve a one-time operating budget requirement in
the amount of $2,055,000 for outdoor water use ban voluntary compliance
measures, critical path communications, and contingency as identified in this
report to be funded from the Water Reserve Fund as permitted under Water
Reserve Fund By-law 2003 – 141;
4.
Delegate authority to the Deputy City Manager of
Infrastructure Services and Community Sustainability to expend water reserve
funds as necessary to manage the drinking water system in the impacted areas in
accordance with Water By-law 2003-500 as well as the principles of the Safe
Drinking Water Act 2002 and implement any measures required during the outdoor
watering ban; and
5. Approve an amendment to the Water By-law 2003-500, in the form set
out in Document 3, in order to provide for enforcement, including fines, for
violations of bans issued under the by-law.
RECOMMANDATIONS DU
RAPPORT
Que le
Comité :
1.
reçoive les renseignements qui se trouvent dans le
présent rapport quant à la mise en œuvre d’une interdiction immédiate et
obligatoire d’arrosage à l’extérieur à Barrhaven, à Riverside Sud et à Manotick
à la suite de son décret aujourd’hui par la directrice municipale adjointe des
Services d’infrastructure et de la viabilité des collectivités, et ce, afin
d’assumer les responsabilités de la Ville en vertu de la Loi de 2002 sur l’eau potable saine;
2.
approuve la mise en œuvre de la série de mesures
décrites dans le présent rapport qui sont conçues pour soutenir le respect
volontaire de l’interdiction d’arrosage extérieur;
3. approuve une
exigence budgétaire de fonctionnement ponctuelle d’un montant de 1 935 000 $
pour les mesures de respect volontaire de l’interdiction d’arrosage extérieur
et les communications sur les chemins critiques, telles qu’elles ont été
précisées dans le présent rapport, qui seront financées à même le Fonds de
réserve de l’eau tel que l’autorise le Règlement no 2003-141 sur le Fonds de réserve de l’eau;
4. délègue à la directrice
municipale adjointe des Services d’infrastructure et de la viabilité des collectivités
le pouvoir de puiser des fonds dans le Fonds de réserve de l’eau au besoin afin
de gérer le réseau d’eau potable dans les secteurs touchés conformément au Règlement no 2003-500 – Eau ainsi que les
principes de la Loi de 2002 sur
l’eau potable saine et de mettre en œuvre toutes les mesures requises au
cours de la période d’interdiction d’arrosage extérieur;
5. approuve une
modification au Règlement no 2003-500
– Eau sous la forme décrite dans le document 3 afin
d’assurer l’application de l’interdiction, y compris les amendes relatives aux
violations des interdictions qui sont imposées en vertu du Règlement.
EXECUTIVE
SUMMARY
As a
result of recent events described in this report, the Deputy City Manager of
Infrastructure Services and Community Sustainability, in accordance with the
provisions of Section 77 of the City’s Water By-law 2003-500, as
amended, and in accordance with the principles and obligations contained in the
Safe Drinking Water Act, 2002, is enacting immediate and mandatory
restrictions on outdoor water-use in the areas of Barrhaven, Riverside
South and Manotick in order to ensure continued delivery of drinking water to
the area. These restrictions will be in effect until further notice.
The
City’s Water Quality Management System was developed using principles contained
in the Safe Drinking Water Act, 2002 and submitted to the Ministry of
the Environment, which granted the City a licence to operate the City’s
drinking water system. These principles include those set out in Section 19 of
the Act, which is scheduled to come into force in 2013, and include “prudent”
management of municipal drinking water systems to ensure the service is
delivered “competently and with integrity, with a view to ensuring the
protection and safety of the users of the municipal drinking water system
In keeping with these principles,
the restrictions are being enacted under Section 77 of the City of Ottawa’s Water By-law No. 2003-500, and they are
supported by the City Solicitor as well as other City officials and
departments.
Council and the public are
assured that the drinking water in these areas continues to be safe.
However, the City’s ability to
supply water to this area has been greatly limited by the premature
deterioration and failure of the Woodroffe Avenue transmission watermain, which
normally supplies nearly all drinking water, including water used for outdoor
purposes, to the areas in which the ban is now in place. Since January, the
transmission watermain has been out of service for repairs and replacement of
approximately one kilometre.
The City is doing everything
within its power to have the repairs completed in July 2011. However, working
on an accelerated schedule, re-commissioning could take place as late as mid-August
2011 depending on a number of factors. Until the transmission main is
re-commissioned, the impacted areas will be served by a much smaller backup
system.
Until mid-June, the back-up
system will only deliver 10 per cent of the normal water volume the City usually
can deliver to the area. After that, an upgrade will allow roughly 18 per cent
of the normal volume to be delivered until such time as the transmission
watermain is back in service. Additional options to increase supply are being
investigated.
Modeling shows the back-up system
will provide enough volume for normal indoor use demand, but that it will not
meet regular late spring and summer water demand in these areas.
Should water use exceed supply,
serious impacts in the affected areas could result including potential
contamination of the water supply, depressurization of the system, loss of
supply, and difficulties in supplying fire protection.
Addressing these potential consequences could require issuance of “no water use”
advisories for up to seven days, boiled-water advisories for up to four weeks,
severe water-use restrictions including indoor use restrictions, bottled water
being supplied to 60,000 to 80,000 customers for an extended period, and
extensive system flushing and testing.
Emergency plans to address a
depressurization of the system, including back-up fire fighting supplies, emergency
communications, and more, have been developed and are ready for implementation
should the need arise.
To avoid the scenarios listed
above, and after an exhaustive search of all reasonable alternatives to supply
more water to this area proved unsuccessful, the City has no choice but to
implement an immediate ban on all outdoor water use until the renewal work is
completed on the Woodroffe Avenue transmission watermain. This includes a ban on lawn and garden
watering, car washing, pool filling and top ups, building or grounds cleaning,
and any other outdoor uses of City-supplied water in the affected areas.
It is important to note that if
the public follows the ban, modeling shows pressure will be maintained in the
system and the emergency scenarios outlined above will be avoided.
This report details the steps that
led to the ban being enacted. It also seeks Council approval for a series of measures
designed to promote voluntary compliance with the outdoor water-use ban;
spending on these measures; amendments to Water
By-law No. 2003-500 to clarify the offence provisions regarding use of
water in a restricted manner; and, an increase of delegated
authority to the Deputy City Manager Infrastructure Services and Community
Sustainability for reserve spending as appropriate until the end of the water
use restrictions.
RÉSUMÉ
À la
suite des récents événements qui sont décrits dans le présent rapport, la
directrice municipale adjointe des Services d’infrastructure et de la viabilité
des collectivités, conformément aux dispositions de l’article 77 du Règlement de la Ville d’Ottawa régissant
l’alimentation en eau 2003-500, tel que modifié, ainsi qu’aux principes et
aux obligations établis dans la Loi de
2002 sur la salubrité de l’eau potable, décrète aujourd’hui des restrictions
immédiates et obligatoires sur l’utilisation extérieure de l’eau, jusqu’à
nouvel avis, dans les secteurs de Barrhaven, de Riverside Sud et de Manotick,
et ce, afin d’assurer l’approvisionnement en eau potable salubre et propre dans
ces secteurs.
Le Système
de gestion de la qualité de l’eau de la Ville a été élaboré en tenant compte
des principes établis dans la Loi de 2002 sur la salubrité de l’eau potable,
puis soumis au ministère de l’Environnement, qui a accordé à la Ville un permis
d’exploitation d’un réseau municipal d’eau potable. Ces principes sont
notamment ceux énoncés à l’article 19 de la Loi, qui doit entrer en vigueur en
2013. Ils prévoient une gestion prudente des réseaux municipaux d’eau potable,
de façon à ce que le service soit assuré « avec compétence et intégrité,
afin d’assurer la protection et la sécurité des usagers du réseau municipal
d’eau potable. »
Les
restrictions sont décrétées en vertu du paragraphe 4(a) et de
l’article 77 du Règlement no 2003-500
– Eau de la Ville d’Ottawa et sont appuyées par le chef du contentieux
ainsi que par les dirigeants et les services municipaux.
On assure
aux membres du Conseil et du public que l’eau potable de ces secteurs restera
salubre.
Cependant,
la capacité de la Ville à approvisionner ces secteurs en eau a été grandement
limitée par la détérioration prématurée de la conduite de distribution de
l’avenue Woodroffe, qui transporte normalement presque toute l’eau
potable, y compris l’eau servant à des fins extérieures, dans les secteurs où
l’interdiction est maintenant en vigueur. La conduite de distribution est hors
service en raison de travaux de réparation et de remplacement sur environ un
kilomètre.
La Ville
fait tout son possible pour que les réparations soient terminées en
juillet 2011. Cependant, dans un calendrier accéléré, la remise en service
pourrait n’avoir lieu qu’à la miaoût 2011 selon un certain nombre de
facteurs. Jusqu’à ce que la conduite de distribution soit remise en service,
les secteurs touchés seront desservis par un réseau de secours beaucoup plus
petit.
Jusqu’à
la mi-juin, le réseau de secours ne transportera que 10 p. 100 du volume
d’eau normal que la Ville achemine habituellement à ces secteurs. Après cette
date, des améliorations permettront d’acheminer à peu près 18 p. 100 du
volume normal jusqu’à la remise en service de la conduite de distribution. Une
analyse est en court pour évaluer d’autres options.
Selon la
modélisation, le réseau de secours fournira un volume suffisant d’eau pour
répondre à la demande d’eau à des fins intérieures, mais il ne répondra pas à
la demande d’eau normale de la fin du printemps et de l’été dans ces secteurs.
Si
l’utilisation d’eau venait à dépasser la capacité d’approvisionnement, il
pourrait y avoir de graves répercussions sur les secteurs touchés, y compris
une contamination éventuelle de l’approvisionnement en eau, la dépressurisation
du réseau, la perte d’approvisionnement et des difficultés à assurer une
protection contre les incendies. Pour aborder ces répercussions possibles, il
pourrait être nécessaire de maintenir des avis d’« interdiction d’utiliser
l’eau » pendant une période pouvant aller jusqu’à sept jours et des avis
d’ébullition de l’eau pendant une période pouvant aller jusqu’à quatre semaines,
de restreindre sévèrement l’utilisation d’eau, y compris à l’intérieur, de
fournir de l’eau embouteillée à 60 000 à 80 000 clients pendant
une période prolongée et de mettre en place un vaste système de chasse d’eau et
d’analyse.
Des plans
d’urgence visant à pallier une dépressurisation du réseau, y compris des
fournitures de secours de lutte contre les incendies, des communications
d’urgence et plus encore, ont été élaborés et sont prêts à être mis en œuvre au
besoin.
Afin
d’éviter les scénarios énumérés ci-dessus et étant donné l’insuccès d’une
recherche exhaustive de toutes les options de rechange raisonnables visant à
fournir plus d’eau à ces secteurs, la Ville n’a d’autre choix que de mettre en
œuvre une interdiction d’arrosage extérieur immédiate jusqu’à la fin des travaux
de renouvellement de la conduite de distribution de l’avenue Woodroffe.
L’interdiction vise l’arrosage des pelouses et des jardins, le lavage des
voitures, le remplissage des piscines, le nettoyage des immeubles et des
terrains et toute autre utilisation extérieure de l’eau fournie par la Ville
dans les secteurs touchés.
Il est
important de noter que la modélisation indique que, si le public respecte
l’interdiction, la pression sera maintenue dans le réseau et les scénarios
d’urgence ci-dessus seront évités.
Le
présent rapport décrit les étapes qui ont mené au décret de l’interdiction. On
y demande aussi que les membres du Conseil approuvent une série de mesures
destinées à favoriser le respect volontaire de l’interdiction d’arrosage
extérieur; les dépenses liées à ces mesures; les modifications au Règlement no 2003-500 – Eau visant
à clarifier les dispositions relatives aux violations des restrictions sur
l’utilisation de l’eau et la délégation de nouveaux pouvoirs à la directrice
municipale adjointe des Services d’infrastructure et de la viabilité des collectivités
afin que celle-ci puisse puiser des fonds dans la réserve, le cas échéant,
jusqu’à ce que les restrictions sur l’arrosage soient levées.
BACKGROUND
The Woodroffe
Avenue Transmission Watermain
The 1220
mm (48”) Woodroffe Avenue transmission watermain runs from Navaho Drive to
Fallowfield Road and was installed in 1975-76.
It is a concrete pressure pipe typical of use during that era for large transmission
watermains. According to the Ontario
Ministry of the Environment Asset Renewal Guidelines, the life span of this
pipe and others its vintage is 50 to 100 years.
The
first break of this pipe occurred on November 26, 2007 just south of the Nepean
Sportsplex. In October 2008, the pipe was temporarily decommissioned to carry
out a condition assessment between Hunt Club and Fallowfield that identified several
locations of low to moderate deterioration.
In a February 2009 report, the determination was made that spot repairs
would be necessary at a number of sites. It was proposed that these repairs
would be scheduled to occur when the pipe could be taken out of service for an
extended period.[1]
This was scheduled to take place in late 2011 and early 2012 after completion
of the new secondary water supply to the area (referred to as the 2W2C
transmission watermain) scheduled for later this year. Completion of the
secondary water supply would have allowed for work on the Woodroffe Avenue
transmission watermain to be done without service impacts. The 2008 inspection
indicated there was not a high risk of failure, and that the Woodroffe Avenue
transmission watermain renewal works could proceed on this schedule.
On
January 14, 2011, a second pipe failure occurred at a location north of Hunt
Club Road — an area that was not part
of the 2008 investigation. Subsequently,
a more extensive condition assessment of the transmission main was carried out on
the section from David Dr. to Fallowfield Rd. to determine whether the pipe
could be safely re-commissioned.[2] In mid-February, the investigation identified
significant deterioration immediately north and south of Hunt Club Road, as
well as additional areas requiring spot repair in isolated areas near Knoxdale,
Slack and Grenfell.
The
investigation found several areas in critical distress with a high risk of
eminent failure in areas north and south of Hunt Club.
On this
basis, staff determined that the Woodroffe transmission main failed well before
its expected life span as described by the Ministry of the Environment and could
not be re-commissioned without high risk of another pipe failure.
Figure
1
Condition
Assessment & Planned Rehabilitation Work
The
Back-up Water Supply
Subsequent
to the 2007 transmission main break, two back-up pumps were purchased to allow
for temporary pumping should a failure occur in any major transmission main in the
city. This temporary pumping system was
first put in service to conduct the condition assessment in 2008.
On
January 14, 2011, one of those pumps was installed within hours on a 400 mm PVC
watermain on Merivale Road to maintain pressure and supply to the area served
by the Woodroffe transmission main. Safe
drinking water has been supplied to the communities of Manotick, Riverside
South, and Barrhaven using this back-up water supply since the January
watermain break.
The
pump serving this system has since been monitored 24-7 by Drinking Water
Service staff on site, who have the second back-up pump and pipe repair
supplies ready at hand if anything were to occur with this back-up system. The Merivale Road watermain is made of PVC
pipe, and was installed in 2000 as part planned system expansion, and is felt
to be of very low risk of failure. Regardless,
the entire length of pipe undergoes daily visual inspection for potential
breaks.
Figure
2
Temporary
Pump Station & Back-up Supply
Fallowfield
Rd.
The
Long-term Reliability Plan
The
City’s Infrastructure Master Plan
identifies several capital projects intended to provide water system redundancy
and improved water service reliability.
The City’s Long-Range Financial
Plan identifies funds in 2010-2011 for a secondary water supply across the
Rideau River (2W2C transmission main) to provide back-up supply to the areas
serviced by the Woodroffe transmission main.
Therefore, as of 2008 and until the January break, the plan had been to complete
the previously mentioned spot repairs once this secondary feed across the
Rideau River was commissioned and the Woodroffe transmission watermain could be
temporarily decommissioned without service impacts.
Design
of the secondary transmission watermain was carried out in 2010 and completion is
scheduled for October 31, 2011. Design
of the Woodroffe transmission watermain spot repairs started in 2010, and the
works were scheduled to commence in late 2011 after commissioning of the new
2W2C transmission main.
Figure
3
2W2C
Link
Unfortunately,
the January 2011 break has taken the Woodroffe transmission water main out of operation
approximately eight months sooner than planned.
This could not have been anticipated in 2008 as the assessment carried
out at that time did not indicate that this transmission main was particularly
vulnerable, or that the pipe material was subject to premature failure.[3]
Similar reliability links are underway in the west and east of the
City. A secondary link to Kanata is
under construction and is due to be commissioned in 2012. The environmental assessment for the Orleans
secondary link is due to commence within weeks and be completed later this year.
Design of the secondary link is to be completed in 2012, and construction of it
is scheduled for 2013-2014.
ANALYSIS
Action Post 2007 Watermain Break
As previously indicated, the first break
on the Woodroffe watermain took place in November 2007 on a pipe section in
front of the Nepean Sportsplex. Due to the premature failure of this
pipe, the section that failed was investigated to determine the cause.
The investigation concluded that the exterior mortar coating at the
failure location was deteriorated and was the root cause of the watermain
break, and that the mortar had deteriorated in more than one location along the
single length of the pipe that was examined. These observations led to a
detailed condition assessment of the watermain from Hunt Club to
Fallowfield. This detailed condition assessment was carried out in late
2008 and the results were finalized in early 2009. The results of this
condition assessment indicated that the pipe was generally in good condition,
with some sections that showed signs of low to moderate deterioration in the
area near where the failure had taken place.
The 2007 watermain failure reinforced the
need for a secondary supply of sufficient size to meet peak seasonal demand for
the Barrhaven, Riverside South, and Manotick pressure zone to provide
redundancy. This need was identified in the City’s Infrastructure Master
Plan, and, at the time of failure, the secondary supply was in the initial
stages of the Environmental Assessment (EA) process to review alternative alignments.
The plan for this significant undertaking was to complete the EA in 2009,
undertake the design in 2010 and proceed to construction in 2011. This
secondary supply (referred to as the 2W2C watermain) is under construction and
is expected to be operational in late October 2011.
The strategy to repair the deteriorated
sections of watermain on Woodroffe was to undertake spot repairs after
completion of the 2W2C secondary watermain so that the Woodroffe watermain
could be taken out of service without any service interruptions. Funding
for these repairs was identified in the 2011 capital budget.
Unfortunately, in January 2011 another
failure occurred on the Woodroffe watermain, this time on the section north of
Hunt Club Road. This section was not within the limits of the watermain
that was inspected in 2008. In February 2011, another detailed condition
assessment was undertaken, this time from David Drive to Fallowfield
Road. This condition assessment was commissioned under the Deputy City
Manager Infrastructure Services and Community Sustainability’s delegated
authority given the urgency of the assessment. The results obtained in
mid-February indicated significant deterioration of the section just to the
north of Hunt Club and what was even more concerning was that the sections
previously identified south of Hunt Club (in front of the Nepean Sportsplex)
had deteriorated at an accelerated rate.
The decision was made not to put the
watermain back in service out of concern that the risk of another failure was
too high. In short, the pipe is prematurely beyond its useful life and
cannot be relied upon to safely and reliably convey water.
Based on the results of the new condition
assessment, the renewal approach changed from spot repairs to complete replacement
of a one-kilometre section from north of Hunt Club to Vaan Drive. The
change in approach was the result of the 2011 condition information that showed
the areas that needed attention were no longer limited to a few discrete areas
as the 2008 assessment showed. The deterioration was extensive between the
sections between north of Hunt Club and Vaan Drive where total replacement is
needed. This change resulted in a need for additional fund authority to cover
the increased scope of work.
The request for the additional financial
authority was included in a motion that was approved by Council at the March 9,
2011 Council Meeting. At that point, work was already underway on the
design for the pipe replacement and on options to mitigate service impacts,
including the extension of the 305 mm watermain that currently services the
Nepean Sportsplex up to Vaan Drive to help provide more water volume to
Barrhaven, Riverside South and Manotick.
Initial indications through modeling
suggested that this interim connection, along with the 400 mm back-up supply,
could meet summer demand conditions, but on March 24th after
additional verification of the model, it was concluded that the system would
not be able to meet summer demands. Given the critical situation, staff are focusing on finding ways to accelerate the watermain
replacement and on interim water supply measures to prevent depressurization of
the water system while continuing to search for other interim relief measures.
As can been seen, since the 2007 watermain
break there has been a strategy in place to reduce the risk of service
interruptions to this area. Unfortunately, the break in January 2011
occurred before completion of the 2W2C watermain. Since the January 2011
break, there has been a sustained effort to find solutions and have these
implemented in the most expeditious manner possible.
The imposition of the ban on outdoor water
use is being implemented as it is the only measure that can safeguard the
integrity of the supply in the short term until the repairs are completed or a
more robust interim supply is found.
Alternative
Transmission Main Rehabilitation and Interim Supply Options
Rehabilitation
of the 1220 mm Woodroffe Transmission Main
Several
options were considered for the rehabilitation of the Woodroffe watermain, as
summarized in Document 1. These options
ranged from deferring the repairs until after the secondary watermain to the
area is in service to undertaking spot repairs of deteriorated sections, relining
the old pipe and complete pipe replacement.
After
careful consideration, and in light of the increased pace of deterioration, it
was determined that the preferred solution was to replace the 1220 mm watermain
between north of Hunt Club to Vaan Drive (approx. 1 km) and undertake spot
repairs at other isolated locations.
Interim
Water Supply
Given
the Woodroffe 1220 mm transmission watermain would not be in service until
early to mid-August, other interim water supply options were considered with
the objective of meeting peak summer demand conditions. These options are summarized
in Document 2. These ranged from
providing additional pumping capacity, to providing an overland pipe, to a
complete water ban on outdoor water use in the impacted area.
There
are measures that were identified that could improve service, but these would
not be in place until early June. These measures include extending the existing
305 mm watermain that services the Nepean Sportsplex and connecting it to the
1220 mm watermain at Vaan Drive at a point beyond where the pipe is going to be
replaced. This option has been
incorporated into the construction program.
Consideration
is also being given to changing the connection point of this 305 mm at Hunt
Club and providing temporary pumping, similar to what is in place for the 406 mm
watermain along Merivale. These
additional measures are still under review to see to what extent they can
improve the situation. These measures
could improve the situation after the early June period, but they do not remove
the need for a water ban on outdoor use.
Implementation
Status Update
The
tender for the works includes 2 phases. Phase 1 is to extend the 305 mm
watermain from the Nepean Sportsplex to Vann Drive, and Phase 2 is to replace
the 1220 mm diameter transmission watermain between north of Hunt Club and Vaan
Drive. The tender closed on Thursday, 21
April 2011.
The
contract has been awarded. Infrastructure Services staff are working with
Greenbelt Construction on opportunities to accelerate both the 305 mm extension
and the replacement of the 1220 mm watermain.
The tender includes bonus provisions for accelerated on-time completion of
both phases: 6 June 2011 for the extension of the 305 mm watermain; and 29 July
2011 for the replacement of the 1220 mm transmission watermain. There are also substantial incentives in the
contract for early completion of both phases. In addition to these bonus
provisions, every effort is being made to accelerate the completion of both
phases of the project, including providing the contractor with a flexible
working schedule. Based on initial
discussions with the contractor, they are optimistic that they will be able to
complete both phases within the specified timelines and are looking at ways to
complete the project early.
It is
also important to understand that after completion of construction of the 1220 mm
transmission, Drinking Water Services requires approximately two weeks to complete
the necessary commissioning processes required by regulation.
In
short, the City is doing everything within its control to ensure these works are
completed as soon as possible. However, until the 1220 mm Woodroffe Avenue
watermain is re-commissioned, Barrhaven, Riverside South, and Manotick will
continue to be served by a backup system.
Meeting Peak Demand
The
communities of Barrhaven, Riverside South, and Manotick are serviced by two
water reservoirs that allow the system to meet fluctuations in demand.[4] These reservoirs are primarily serviced by
the 1220 mm Woodroffe transmission main and the 406 mm diameter Merivale
watermain, which together can keep levels in the reservoirs in the safe zone
during peak demand.
Until
the Woodroffe transmission main is replaced or the secondary link completed,
the area will be serviced by a much smaller back-up system, which modeling
shows cannot meet peak demand.
Figure 4
below depicts a peak water demand situation that typically occurs every other
year (i.e. a 50-50 chance of this occurring this year). The figure is based on
past consumption patterns during the late spring and early summer when people
are planting gardens, watering lawns, topping up pools, and washing cars. The
solid black line shows demand, the red line shows how the current back-up
system is not able to meet this demand, and the broken black line shows the
critical depletion level in the reservoirs needed to maintain normal fire
fighting reserve requirements.
During
the first two days on the left side of the graph, when water demand is in the
normal range, the back-up system can keep pace, and the reservoirs are safely
in the 70- to 95-per-cent full range. These are the supply and demand
conditions in which the system has operated since January 2011. However, you
will notice that on the third day of the event as demand increases, modelling
shows the back-up system cannot keep pace and levels in the reservoirs start to
plunge past the critical level.
Specifically, the modeling shows reservoir levels being depleted past
the critical 20-per-cent level and reaching empty before demand reaches peak consumption levels. This would result in the system
depressurizing and a loss of water supply to some or all customers in the zone.
Figure 4
Meeting Fire Fighting Needs
While
Figure 4 shows reservoir levels reaching 0%, in actuality the City must
maintain a minimum of 20% capacity in the reservoirs in order to meet potential
fire fighting needs.
In an
effort to minimize the amount of water typically used to extinguish an average
structure fire, Ottawa Fire Services will be using a foam wetting agent mixed
with water and will be operating a superior tanker shuttle to all structure
fires in the impacted areas until the Woodroffe Avenue transmission watermain
is re-commissioned. The cost to implement these programs in the affected areas
for the proposed duration is approximately $225,000.00 dollars.
Consequences of Depleting the Reservoirs
If
reservoirs levels drop to critical levels, the distribution system will begin
to depressurize and some or all customers will have no water for basic needs
such as toilet flushing and showering.
Furthermore, contaminated groundwater or soils surrounding the water
pipes could enter the system, including e
coli bacteria and
other chemical contaminants from cross-connections within the sytem. Accordingly,
the City would need to issue a No Water
Use or Boil Water Advisory, which would be in effect until the Medical
Officer of Health was sure that the water supply was safe for normal use and
consumption.
Severe
water restrictions would be required to restore water pressure and the water
supply. Not only would an outdoor ban be
in effect, but indoor conservation measures would be imposed. In communities where this has occurred,
limits have been placed on shower length, toilet flushing, and the use of
washing machines and dishwashers.
Depending on the severity and duration of the pressure shortfall, the
City would need to distribute bottled water to customers to satisfy basic
drinking water needs.
The Boil Water Advisory and indoor water use
restrictions would likely be in place for 2-4 weeks while the City repressurized
and flushed the system. During this
period, the water system would be at high risk of water main breaks due to
fluctuating water pressures in the pipes.
DISCUSSION
Outdoor Use Water Ban is Now
in Effect
The City
has a duty to operate its drinking water system in a manner that protects the
safety of the water supply.
Accordingly,
the Deputy City Manager of Infrastructure Services & Community
Sustainability under Section
77 of the City of Ottawa’s Water By-law 2003-500 has
declared a complete ban on outdoor
water use in the area shown on Figure 5 until further notice in order to ensure continued supply of safe
drinking water to the area.
Water
customers in this area, namely the communities of Barrhaven, Manotick, and
Riverside South must comply with this ban or risk prosecution and, more
importantly, the loss of their water supply. Outdoor water use includes, but is not
limited, to lawn and garden watering using a hose, car washing, pool filling
and top-ups, and the use of a hose for any exterior purpose. This does not include capturing water in rain
barrels to hand water plants using a watering can.
Figure 5
Area affected by ban on outdoor water use
Voluntary
Compliance Measures
In
order to encourage voluntary compliance with the outdoor water restrictions,
the City is prepared to implement various means to manage this outdoor water
demand. These measures are meant to
provide additional assurance that the outdoor water demand will not increase
during the construction period so that the integrity of the drinking water
system can be maintained for the community.
The following measures are recommended for Council to approve for implementation
now in order to manage this outdoor water demand.
Top It Up
There are an estimated 3000 pools and hot tubs in the
affected area. The City will provide pool and hot tub filling requirements. Residents will be able to register on-line or
by calling 311. The estimated cost for
this measure is up to $200,000.
Support for Garden Centres
The
City is aware of at least 16 retailers in the zone that may sell outdoor plants
during the gardening season. Affected
retailers will be provided with hauled water daily to maintain their inventory. Businesses will be able to register on-line
or by calling 311. This service will
commence Thursday April 28. This
measure is estimated at $415,000.
Rain Barrel Subsidy
The 2011 Water Budget includes $150,000 for
distribution of subsidized rain barrels to residents. This equates to
distribution of 2,100 rain barrels at roughly a $50 subsidy. The proposal
is to target this program in the communities of Manotick, Barrhaven, and
Riverside South. The City would implement a rain barrel rebate program, based
on the following criteria:
·
Limit
of one rain barrel per household,
·
Minimum
volume of 180 L,
·
Must
be child-proof,
·
Must
be mosquito-proof (West Nile Virus prevention), and
·
Does
not apply to build-your-own rain barrels.
Residents can get more details about the rebate
program on our website at Ottawa.ca.
Development Agreements
In the instance
of development agreements with clauses pertaining to the installation and the
maintenance of sod, plants, shrubs and trees where planting has not yet
occurred, the developers will be given permission to delay the planting of this
vegetation until the end of the outdoor water ban.
Where such
planting has occurred and the vegetation is subject to a warranty period within
the development agreement, the City will work with the developer to ensure
conditions can be met at the least cost.
Flusher
Hydrant Service
The
flusher hydrants previously identified in this zone will not be available to
the water haulers for the duration of the water restrictions. New flusher hydrants will be established on
the periphery of the zone to minimize the length of trips, and to ensure that
existing hydrants on the periphery do not become over taxed. A map showing the existing and new flusher
hydrants available immediately outside this zone will be sent to all water
haulers and will be available on our website.
Car
Washes
The
City will be asking the car washes within the affected area to voluntarily
suspend their operations for the duration of the water restrictions.
Communications
Communications regarding the ban
will be both targeted and broad-based.
Targeted communications will focus on water customers that
may incur particular hardship as a result of the ban. These include the following groups: garden centres, landscape and lawn care
companies, sports associations, day care providers, condominium and community
housing associations, commercial pool owners, pool and hot tub installers,
developers and builders, and the heavy construction industry. The
City is committed to working with affected groups to mitigate impacts wherever
reasonable and possible.
Broad-based communications will be used to inform
water customers regarding the following matters:
·
The
need for the ban to maintain the water supply and protect public health;
·
The
nature and extent of the ban;
·
“What
you can do” to protect the water supply;
·
The
measures in place to help mitigate impacts of the ban; and
·
Ways
in which customers can implement water efficiency inside their homes and
buildings.
Information will be delivered to all water customers through
letter mail, earned media, community paper print ads, a radio campaign, digital
display boards along main corridors in the community, web and social media
content and signage throughout the area.
Information session open to all water customers will
be held in the coming days. Councillors and city staff will be available to
provide details regarding the ban, to answer questions from the public, and to
allow for sign-up to the “Top It Up” program.
The City will also be adding additional 311 staff as
needed to handle increased call volumes from residents in the impacted area
with questions on the ban,
The
City understands the negative impact this ban will have on the 60,000 to 80,000
people living in these communities. Affected
residents, businesses and institutions must recognize that the City would not
impose this ban were the situation not critical, and their compliance with the
ban essential.
The
City will provide updates at regular intervals regarding the status of the
construction work, mitigating measures available, and any changes in the ban
limitations. There will also be daily conference calls with the ward councillors to
provide status updates.
Throughout the period of the ban, residents will be
updated on the status of the construction and/or the risk levels regularly.
This will consist of a minimum of one update per week, including additional
updates during heat waves and long weekends to alert residents of the increased
risk during these traditionally peak periods.
If reservoir levels reach critical levels, a secondary
communications plan will be launched immediately. This will inform residents of
the low reservoir levels and remind residents to comply with the ban in order
to preserve the safety of the water supply.
In the
meantime, the Deputy City Manager respectfully requests the community’s
patience and cooperation, and assures customers that the City is committed to
working with affected groups to mitigate impacts wherever reasonable and
possible.
Councillors for the four affected wards will also be given access to
funds of up to $5,000 each for additional measures, like printing and
advertising, during the ban. The cost of the communications plan outlined above
and to support contingency plans outlined below, if needed, are estimated at
$420,000.
Traffic Implications
The contract to extend the 305 mm
watermain and replace the 1220 mm watermain between north of Hunt Club to Vaan
has been awarded and construction will underway shortly. This contract will
impact traffic on Woodroffe and every effort is being undertaken to reduce
impacts on transit. Details are still being finalized with the
contractor, but commuter should expect delays and consider using transit or use
alternative routes, such as the 416, Prince-of-Wales or Cedarview. More
details will be communicated in the coming days.
City Operations Impact
The ban will have an impact on the City
operations including washing of vehicles, using alternative flusher hydrants,
watering trees, and other activities. An allowance of $500,000 is being set
aside to offset the cost of these impacts.
Contingency Plans
During
the ban, Environment Services staff will be monitoring levels in the reservoirs
in the affected areas 24-7 and keeping all appropriate City staff, including
the fire department and the Security and Emergency Management Duty Officer, up
to the minute on the degree of risk. In the event reservoir levels start
dropping faster than the system’s ability to supply water, critical communication
through various means, including emergency public service announcements, will
be employed in order to avoid a depressurization.
However,
if these measures fail, there is significant risk of a wide-spread water
shortage in this zone. Therefore, a
contingency plan has been developed to ensure continued supply of drinking
water to residents and the ability to continue fire fighting operations. The plan is comprised of the following
elements:
Distribution
of Potable Water
Residents
in the impacted areas would require access to an alternative source of potable
water. The existing contingency plan consists of the following:
·
Procurement
of potable water from existing suppliers;
·
Providing
access points to distribute potable water;
·
Transporting
potable water to the identified distribution centers;
·
Distributing
potable water to vulnerable populations; and
·
Providing
communications and education to impacted residents.
Providing Water for Hygiene Purposes
If
required, the City will aim to provide 24/7 access to facilities outside the
affected area to provide potable water and showering facilities to impacted
residents. Given the limited capacity of facilities with showers
near the impacted area, residents will be encouraged to make alternate
arrangements where possible (i.e. family, friends, and workplaces).
Additionally, the City will deliver an adequate supply of potable water to the
vulnerable population and has plans in place to accommodate this population in
a temporary lodging centre in the event of an extended service disruption.
Ensuring
Adequate Fire Supply
Fire
Services has established a protocol with Environmental Services that triggers
the need to disconnect from the City water supply. If that trigger is reached,
Fire Services has contingency measures in place for obtaining an alternate
water supply.
Contingency
Communications
In the
event of a boil water advisory or a complete water
ban, the contingency communications plan will go into effect. It will be
critical for the City to quickly and effectively advise residents of the health
risks associated with the potentially contaminated water and provide them with
solutions to treating and managing their drinking water.
In the
event of boil water advisory, various means of communications will be utilized,
including a media event, contact with media outlets, updates to digital display
boards, social media outreach, targeted radio ad messaging, as well as direct
and face-to-face outreach to affected residents.
Daily
updates would provide the most current information to residents.
This
messaging would escalate in the event of a complete water ban to include
information on the complete water ban, as well as information on bottled water
distribution.
Updates
pertaining to the location of water distribution, as well as information on
line-ups and wait times would be provided through various means, including the
media, direct and face-to-face outreach, the website and through a Twitter feed
similar to the HINI vaccination Twitter outreach. This will include real-time
updates throughout the day to which residents can refer for the most up to date
information.
Enforcement
In
order to minimize non-compliance and help avoid a system depressurization, this
report seeks approval of enforcement measures under the ban. This requires an amendment to the City’s Water
By-law as set out in Document 3 attached to this report. The By-law & Regulatory Services Branch will lead
enforcement. The hours of patrols and
enforcement will increase or decrease depending upon weather conditions and the
level of compliance with the ban. The schedule will include 24-hour
service, as warranted. Enforcement staff will also respond to reports
registered with 311 and will distribute educational material as part of their
enforcement duties.
Initially, the program will focus
on educating residents and businesses with respect to the importance of
compliance with the ban as well as the potential implications of
non-compliance. Charges will be issued as circumstances warrant, with
a minimum fine of $500 for an offence under the by-law. Persons charged under
the by-law have the option to pay the fine or plead not guilty and attend
Court, as with any other by-law related charge. The cost for this
enforcement program, which strategically and efficiently utilizes existing
enforcement personnel, is estimated at $75,000.
CONSULTATION
Short-term consultations with
affected stakeholders are outlined above, and will continue throughout the ban.
COUNCILLOR COMMENTS
The four impacted Ward Councillors are aware of this
report.
LEGAL/RISK MANAGEMENT
IMPLICATIONS
The City's Water
By-law 2003-500 and its various requirements are reflected in the broad
provisions of the Municipal Act, 2001, that allow municipalities to pass
by-laws respecting the "economic, social and environmental well-being of
the municipality" as well as respecting the "health, safety and
well-being of persons". In this respect, Section 77 of Water By-law
currently states: "The General
Manager may suspend any or all use of water through a hose or other attachment,
or for use for street, lawn or garden sprinkling." It is important to note
that this original authority of the former "General Manager",
currently rests with the Deputy City Manager of Infrastructure Services and Community
Sustainability, following various organizational restructurings, including the
one approved by City Council in October 2009.
More
specifically, the Safe Drinking Water Act, 2002, also provides for the
protection of human health and the prevention of drinking water health hazards
by imposing duties, along with a high standard of care, upon the owners and
operators of municipal drinking water systems to ensure the safety of the users
of these systems. As such an owner and operating authority, the proposed
outdoor water ban is a key element in fulfilling the City's responsibilities
under the Act.
In addition, in
order to further the objectives of the outdoor water ban, Water By-law No.
2003-500 requires the amendments, set out in Document 3, to include general
enforcement provisions and to create offences and fines for violations of bans
authorized under the By-law.
Also, at this point in time, operational staff are in the process of recalling from storage all files
from the former Regional Municipality of Ottawa-Carleton in relation to this
matter. Once that task has been completed, Legal Services will review all of
the relevant documents and determine what, if any, legal action is available to
the City of Ottawa.
Finally,
although the implications of the outdoor water ban may have some negative
impacts on both residents and businesses in the designated area, Legal Services
is of the opinion that the steps taken by the City to respond to, or avert, an
emergency situation are unlikely to give rise to liability. This opinion is premised on the City acting
reasonably as well as in good faith, and, in doing so, implementing those
actions that are necessary under all of the circumstances.
FINANCIAL IMPLICATIONS
Funding
requirements for the measures described in this report are estimated as
follows:
1. Fire Fighting
Measures $ 225,000
2. Top it Up $ 200,000
3. Garden Centre
Assistance $ 415,000
4. Councillor
Advertising $ 20,000
5. Enforcement $ 75,000
6. Communications $ 420,000
7. Contingency $ 200,000
8. City Operations
Allowance $ 500,000
$2,055,000
The
total cost of the measures is $2,055,000 which, upon Council’s approval, would
be funded from the Water Reserve Fund in accordance with Water Reserve Fund By-law 2003 – 141. The projected 2011 year-end
balance of the Water Reserve Fund was projected to be $25.844M prior to
consideration of the above funding requirement.
Additionally,
it is estimated that the mandatory outdoor water ban will reduce 2011 drinking
water revenues and sewer surcharge revenues by approximately $500k - $850k
given estimated reductions in water consumption. As the volume reduction amounts to less than
0.05% of the City’s total annual water volume production, and that the majority
of water production costs are fixed in nature, there would be minimal savings
in Drinking Water Services operating expenditures to offset the estimated
revenue reduction.
SUPPORTING DOCUMENTATION
Document 1 – Woodroffe
Watermain Rehabilitation Options
Document 2 – Temporary Water Supply Options
Document 3 – Amendment to Water By-law 2003-500.
DISPOSITION
Infrastructure Services
Department will expedite completion of the constructed works. Environment Services Department will report
back to Council upon completion of Phase One of the constructed works. Environment Services Department will lead
implementation of all mitigating measures.
Office of Emergency Management will lead emergency response planning and
response. By-law and Regulatory Services
Branch will lead enforcement activities.
Document 1
Woodroffe Watermain
Rehabilitation Options
|
Option |
Description |
Discussion
/ Rationale |
Outcome |
|
1 |
Do nothing for the summer
– Leave pipe out of service and initiate repairs once 2W2C link is
commissioned |
It
is not possible to meet summer Peak demand |
This option is not
feasible |
|
2 |
Bring
deteriorated pipe back in service – and initiate repairs once 2W2C link is
commissioned |
·
High risk of another
watermain failure ·
Public safety hazard
from large sink hole ·
Risk of
de-pressurizing the system and necessitating a Boil Water Advisory until the
system is flushed (2-4 weeks) ·
Inability to meet
summer Peak Demand ·
Outdoor water use
ban for the duration of the repair period |
This
option is not recommended: Known
risk to public health and safety due to road damage, lack of water, lack of
fire protection and extended boil water advisory |
|
3 |
Advance
the construction of the 2W-2C reliability link in order to being repairs on
the Woodroffe watermain sooner |
The
contractor is currently working full out and is scheduled to complete the
works by October 2011. |
This
option is not feasible |
|
4 |
Spot
replacement (open cut) of watermain sections deemed only as critical |
·
There are 12
sections of watermain that have shown signs of deterioration from 2008 to
2011 ·
The rate of deterioration
since 2008 is considered very high ·
This alternative
only potentially saves 2 weeks of construction in comparison to the permanent
repair solution (option 7) |
It
is not recommended to replace only critical sections of watermain. |
|
5 |
Spot
repairs using Fibrewrap of the 9 sections of watermain deemed heavy or
critical and selected moderate |
·
The Company who
provides these services were not able to provide firm timelines for
construction; their entire workforce required work visas prior to entry into
Canada ·
Current rate of
deterioration shows that more sections of watermains should be replaced now |
This
option is not recommended; it does not provide a cost effective permanent
solution and the start of construction is completely dependent on the work
visa process |
|
6 |
Slip
lining with steel pipe of about 1km of watermain from North of West Hunt Club
to Vaan Drive; and spot replacements of 2 sections at Knoxdale Road and Slack
Road |
·
Engineering review
has determined that it is not a feasible option since it is not possible to
apply the technology in this situation due to the installation and physical
layout of the watermain |
This
option is not feasible |
|
7 |
Open cut
replacement of about 1km of watermain from North of West Hunt Club to Vaan
Drive; and spot replacements of 2 sections at Knoxdale Road and Slack Road |
·
Permanent repair solution for those
deteriorated sections of watermain ·
Mandatory water restrictions will be required
to ensure that basic water services and fire protection are maintained |
This option is
recommended |
Document 2
Temporary Water Supply Options
|
Option |
Description |
Feasibility |
Discussion/Outcome |
|
|
Hydraulic |
Constructability |
|||
|
1 |
Complete Water Ban of
Outdoor Uses |
·
Feasible as it allows the system to
maintain adequate water levels and pressures. |
·
Not applicable |
·
Applies
to all outdoor water uses. This is recommended as it can be achieved before
the onset of late spring to early summer peak water demands. |
|
2 |
Partial
Water Ban |
·
Uncertainty
regarding what outdoor water activities correspond to what demands makes it
impossible to identify what outdoor water activities can occur without
negatively impacting the system. |
· Not applicable |
· Not recommended as this would be ineffective and very difficult if not impossible to enforce. |
|
3 |
Additional
Pumping on Merivale |
·
Not
feasible; suction pressures are too low. |
|
·
Not
feasible. |
|
4 |
Extend existing 305mm in
front of Sportsplex and connect to 1220mm south of Vaan. |
·
Provides
some improvement, but does not remove the need for a water ban. |
·
This
pipe can be extended by early June. |
·
This
is recommended to improve hydraulic conditions, although it is recognized
that it does not remove the need for a water ban on outdoor water uses. |
|
5 |
Overland
or Shallow-Bury Link from 610mm on Hunt Club to 1220mm at Vaan; not including
the 305mm extension to Vaan Drive |
·
This
is hydraulically feasible as it maintains the minimum Barrhaven Reservoir
Level at 25% · Low pressures upstream of Merivale pump (27psi) |
· This option requires significant engineering design to restrain a 610 mm pipe overland. · Cannot be completed sooner than the 305mm extension and diverts resources away from sustainable solution. · Significant hazard created with having an overland pipe under pressure. |
· Not recommended. |
|
Option |
Description |
Feasibility |
Discussion/Outcome |
|
|
Hydraulic |
Constructability |
|||
|
6 |
Overland
or Shallow-Bury Link from 610mm on Hunt Club to 1220mm at Vaan; including the
305mm extension to Vaan Drive |
·
This
is hydraulically feasible as it maintains the minimum Barrhaven Reservoir
Level at 30% · Low pressures upstream of Merivale pump (28psi) |
· This option requires significant engineering design to restrain a 610 mm pipe overland. · Cannot be completed sooner than the 305mm extension and diverts resources away from sustainable solution. · Significant hazard created with having an overland pipe under pressure. |
· Not recommended. |
|
7 |
Additional
pump on 305mm extension, as presented in option 4 |
· Not feasible; suction pressures are too low. |
·
|
· Not feasible. |
|
8 |
Extend
305mm as in Option 4, but connect to 610mm at Hunt Club |
· Not feasible, cannot achieve minimum levels in Barrhaven Reservoir. |
·
|
· Not feasible. |
|
9 |
Extend 305 mm as in Option
4, but connect to 610mm at Hunt Club and provide additional pump on 305mm
extension |
·
This
is hydraulically feasible as it maintains the minimum Barrhaven Reservoir
Level at 35% ·
Low pressures upstream of Merivale pump
(25psi) warrant further investigation to confirm if this will affect water
supply in other areas. |
·
This option requires additional pumping
arrangements similar to what is in place on Merivale. ·
This option requires connection at the Hunt
Club intersection. ·
This option is being reviewed. |
·
This builds on option 4. Further
investigation is underway. |
Document 3
BY-LAW
2011 -
A by-law of the City of Ottawa to amend By-law No. 2003-500 regulating the municipal water supply.
The Council of the City
of Ottawa enacts as follows:
1. Section
1 of By-law No. 2003-500 entitled
“A by-law of the City of Ottawa regulating the municipal water supply”, as
amended, is amended by:
(a) adding the
following definition in alphabetical order:
“By-law
Officer” means a
person appointed by the Council of the City of Ottawa as a Municipal Law
Enforcement Officer to enforce the provisions of this by-law.
(b) repealing the
definition of “General Manager” and adding the following definition:
“Deputy City
Manager” means the Deputy City Manager of Infrastructure Services and Community
Sustainability or an authorized representative of the Deputy City Manager.
2. The said By-law No. 2003-500
is further amended by:
(a) striking out
the term “General Manager” wherever it appears therein and substituting the
term “Deputy City Manager” therefore;
(b) adding,
immediately after Section 13, the following section:
13A. No person shall use, or cause or permit to be used, water in a manner contrary to any direction given by the Deputy City Manager during a period when the use of water has been prohibited or restricted pursuant to paragraph (a) of Section 4.
(c) adding, immediately after Section 77, the following sections:
77A. No person shall use, or cause or permit to be used, water during a period when the use of water has been suspended pursuant to Section 77.
77B. (1) This by-law shall be enforced by a By-law Officer.
(2) For the purpose of enforcing the provisions of this by-law, a By-law Officer may, at any reasonable time, enter and inspect any land to determine if this By-law has been complied with provided that this power of entry does not allow the By-law Officer to enter into any building on the land.
3. Section 103 of the said By-law No. 2003-500 is repealed and the following section substituted therefore:
103. (1) In addition to any other provision of
this by-law, any person who contravenes any provision of this by-law is guilty
of an offence and on conviction is liable to a minimum fine of $500.00 and a
maximum fine of $100,000.00 as provided for in subsection 429(3) 1. of the Municipal Act,
2001.
(2) A person who is convicted of an offence
under this by-law is liable, for each day or part of a day that the offence
continues, to a minimum fine of $500.00 and a maximum fine of $10,000.00 and
the total of all daily fines for the offence is not limited to $100,000.00 as
provided for in subsection 429(3) 2. of the Municipal Act, 2001.
4. The said By-law No.
2003-500 is further amended by adding, immediately after Section 104, the following heading and section:
NOTICE
104A. A notice of restriction under
Section 4 or notice of suspension under Section 77 of the By-law may be given
by way of a posting on the City’s public webpage and/or by any means that, in
the opinion of the Deputy City Manager, are sufficient to provide reasonable
notice of the subject matter of the notice of restriction or notice of suspension,
as the case may be, and that any such method of notice shall be deemed to have
been given to the person or persons to which the notice is directed, on the
earliest date of any such posting.
ENACTED AND PASSED this
27th day of April, 2011.
CITY CLERK MAYOR