HomeMy WebLinkAboutDTS-10-060 - Morgan Ave Sanitary Sewer - Emergency ReconstructionREPORT
REPORT TO:
Councillor B. Vrbanovic, Chair, and Members of the Finance
and Corporate Services Committee
DATE OF MEETING:
March 8, 2010
SUBMITTED BY:
Steve Allen, Manager, Engineering Design and Approvals.
Development and Technical Services, ext 2584
PREPARED BY:
Steve Allen, Manager, Engineering Design and Approvals.
Development and Technical Services, ext 2584
WARD(S) INVOLVED:
2
DATE OF REPORT:
March 1, 2010
REPORT NO.: DTS-10-060
SUBJECT:
MORGAN AVENUE SANITARY SEWER - EMERGENCY
RECONSTRUCTION
RECOMMENDATION:
That staff be authorized to use the emergency provisions of the Purchasing by-law to
complete the design and reconstruction of the Morgan Avenue sanitary sewer which will
permit the Department Head to expedite the procurement of design and construction
services over their normal allowable limits; and,
That $225,000 for the emergency reconstruction of the Morgan Avenue sewer easement
be allocated from the Sandrock Trunk Sanitary Sewer project .
BACKGROUND:
A 300mm diameter sanitary sewer in the area of Morgan Avenue and King Street conveys
significant amounts of sanitary to the sanitary sewer on King Street. CS-Operations has
responded to several incidents of partial blockage of the sewer which resulted in a sanitary
back-up and basement flooding of an apartment building on Morgan Avenue.
To determine the cause of the pipe failure, staff proceeded to divert the flows in off-peak times
in order to perform a CCTV inspection of the pipe. The results of the inspection in January,
2010 show that this section of sanitary pipe is in urgent need of repair or replacement. The pipe
crosses under a railway line and there is risk of damage to the rail bed if the pipe were to fail.
REPORT:
The local trunk sewer between Morgan Avenue and King Street has experienced repeated
failure and is in need of immediate replacement. The sewer is approximately 30m in length and
is made of corrugated metal and is approximately 50 years old. Corrugated metal pipe is not
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permitted in the City of Kitchener for sanitary sewers today. Efforts at the time of the incidents
to determine the cause of the failure of the pipe were hampered by the large volumes of flow,
the poor structural condition of the conduit and the presence of a railway line over the pipe.
Subsequent investigation has shown that this section of pipe will need to be reconstructed.
Staff is proposing to construct a new sewer line under the railway tracks using trenchless
technologies (jack and bore) and connect it to the existing sanitary on King Street East. The
existing sewer will be left in-place and decommissioned to prevent future collapse.
Due to the emergency nature of the work staff are recommending that the emergency provisions
of the purchasing by-law be used to expedite the procurement of design services and
construction services. While not required in the emergency provisions, staff will attempt to
obtain at least three quotes for the construction work.
FINANCIAL IMPLICATIONS:
The preliminary estimate of the cost of reconstruction is approximately $225,000 and is to be
funded with Sanitary funds from a projected surplus in the Sandrock Trunk Sewer project. A
potential surplus of approximately $400,000 has been identified in the Sandrock project due to
favourable bids during tendering and unused provisional items. Staff are recommending that
$225,000 be allocated from this account to complete the design and reconstruction of the
Morgan Avenue sewer. Any remaining surplus after the work is complete would be returned to
the Sanitary Utility.
Approximate location
of sewer
ACKNOWLEDGED BY: Jeff Willmer, General Manager, Development and Technical Services
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