ADMINISTRATIVE REPORT
Date: August 22, 1995
Dept. File No. H764-8
TO: Vancouver City Council
FROM: General Manager of Engineering Services
SUBJECT: Award of Contract No. 9508 -
Granville Bridge Seismic Upgrading Phase III
RECOMMENDATION
A. THAT Contract No. 9508 for the Granville Bridge Seismic
Upgrading Phase III be awarded to the low tenderer, Peter
Kiewit Sons Co. Limited, in the amount of $4,974,430.00,
being the total tender including options, subject to a
contract satisfactory to the Director of Legal Services. No
legal rights shall arise hereby and none shall arise until
execution of the Agreement.
B. THAT additional funding of $860,000.00 be allocated to
Granville Bridge Seismic Upgrading Phase III from available
surplus funding in Streets Basic Capital Accounts listed
under Costs and Funding in this report.
C. THAT the Director of Legal Services execute the contract on
behalf of the City.
GENERAL MANAGER'S COMMENTS
The costs of the Granville and Burrard Bridge seismic upgrades
have escalated beyond those estimated in the 1989 consultant
study. This is primarily due to the lessons learned from the
recent Kobe and Loma Prieta earthquakes and based on more
detailed review of the bridge structure.
The previously completed Phase I and Phase II work on the
Granville Bridge ensured that the structure would not collapse
during the design seismic event. Phase III is intended to ensure
that the bridge will be serviceable within a short time following
an earthquake. Given the Granville Bridge's critical
transportation function and
its importance with respect to emergency access, it
is recommended that A, B and C be approved. This will complete
all Phase III work (in fact, all seismic work) for the Granville
Bridge.
Phase III work for Burrard Bridge can be deferred to the next
capital plan. At that time, the priority for this seismic
upgrading can be evaluated in light of other capital program
priorities.
COUNCIL POLICY
Construction contracts over $200,000 are to be awarded by Council.
PURPOSE
The purpose of this report is to obtain Council approval to award
Contract No. 9508 for the Granville Bridge Seismic Upgrading
Phase III.
BACKGROUND
The Granville and Burrard Bridges are being retrofitted to improve
their performance during a major earthquake. In 1991, under Phase I
of the seismic upgrading, the piers supporting the steel truss spans
of the Granville Bridge were strengthened. Phase II involved
strengthening the steel trusses on both bridges, and this was
completed in 1993. Yet to be completed is Phase III, which will
consist of upgrading the concrete approach spans on both bridges.
Phase I and II upgrading designs and cost estimates were prepared by
Buckland and Taylor Ltd. The same consultant was engaged in 1994 to
provide the detailed engineering design, and to perform the
construction administration and inspection for Phase III. The design
has been completed for both bridges, and tenders were called for the
Granville Bridge. The work consists of upgrading the north and south
concrete approach spans by modifications to the expansion bearings,
installation of new bearings, dampers and longitudinal deck
restrainers, steel and fibreglass jacketing of some columns, and post-
tensioning and concrete encasement of pier cap beams.
CONSTRUCTION TENDERS
Tenders for Contract No. 9508 for the Granville Bridge Seismic
Upgrading Phase III were opened on July 19, 1995, and referred to the
General Manager of Engineering Services.
All tenders have been checked for completeness and accuracy. A
tabulation of the lump sum tender prices is shown below with the
lowest tender underlined.
Additional Total
Base Optional Tender
Tender Work Price
Peter Kiewit Sons Co. Ltd. $4,054,430 $ 920,000 $4,974,430
Canron Construction $4,398,282 $1,287,023 $5,685,305
(A Division of
Canron Inc.)
Pro Industrial
Contractors Ltd. $4,831,323 $ 730,200 $5,561,523
The Consultant's estimated cost of the contract work including all
options was $4,836,400. This is a lump sum contract with unit prices
for additions and deletions. Each Contractor has submitted a total
lump sum tender price including the GST for the basic contract work.
In addition and as required, the Contractors have submitted separate
lump sum prices for five items of optional work, being the amount by
which the total lump sum tender price would increase for inclusion of
that optional work item. This optional work consists of steel
jacketing of nine bridge columns, concrete encasement of three pier
cap beams, and post-tensioning of one pier cap beam.
These options are items of work that have been identified by the
Consultant as deferable, meaning they could be done separately in the
future if sufficient funding were not available now. If they are not
done now, the affected portions of the bridge would probably not
collapse in an earthquake, but would suffer much more severe damage.
That would cost more to repair and would likely take the bridge out of
service until the repairs were complete. These options would cost
about $1.10 M including City work and overhead. It is recommended the
options be done now with additional funding from Streets Basic Capital
Accounts as described under Cost and Funding.
The final cost of the Contract may vary as a result of additions or
deletions, or extra or `force account' work if required. There will
also be various costs incurred which are not included in the Contract.
These will include work by City Forces such as temporary signing,
street light removal and replacement, and street reconstruction around
bridge piers, and City overhead.
It is recommended that Peter Kiewit Sons Co. Limited be awarded
Contract No. 9508 on the basis of their low tender and their company's
experience with the type of work required. This company has several
years experience in related bridge construction work, and we consider
their qualifications adequate for this Contract.
RELATED ISSUES - GRANVILLE BRIDGE
There are several issues pertaining to the Contract which have been
addressed as follows. Some of the construction work at the entrance
to Granville Island will require temporary street closures and
rerouting of the traffic to Granville Island. These closures are
precautionary to protect the public during the lifting of structural
steel and working platforms. Granville Island Trust will only allow
closure of Anderson Street at night between the hours of 2:00 a.m. and
7:00 a.m.. The Contract requires that the noise during this time be
minimized. An exemption to the Noise Control By-Law for this work
will be applied for.
The work at the north end of the bridge will impact on the parking
areas and a leased area under the bridge. There will need to be
temporary elimination of some street parking on Granville Street under
the bridge. Also, an area under the bridge north of Pacific Avenue,
leased to Blacktop Cabs, will have to be used by the Contractor.
Under the lease agreement the City has the right to use the land for
bridge related work, and Blacktop Cabs have been advised.
SEISMIC UPGRADING COSTS
Tenders for Seismic Upgrading Phase III for the Burrard Bridge have
not been called, as it became evident from the consul-tant's revised
cost estimate based on the final designs, that the funding available
would be inadequate to complete work on both bridges. A tabulated
summary of construction costs for both bridges follows:
Construction Costs - Granville and Burrard Bridges
Granville Burrard
Item Costs Costs
Basic
Tender Granville $4.054 M $2.665 M
Final Estimate Burrard
Options $0.920 M ---
Contingency, City Work,
Overhead $0.726 M $0.435 M
TOTALS $5.700 M $3.100 M
Funding Available $4.840 M (1995 Streets ---
Budget)
At this time, the estimated costs to complete the Phase III Upgrading
is $5.70 M for Granville and $3.10 M for Burrard, including
contingencies, City overhead and work by City Forces. These costs are
substantially higher than those based on preliminary estimates
submitted by Buckland & Taylor in their November 1989 report on
Preliminary Bridge Seismic Modifica-tions. Those costs, increased for
City work and overhead, were $4.00 M for Granville and $0.75 for
Burrard. These figures plus an inflation allowance formed the basis
of the funding included in the 1994-96 Capital Plan.
The cost increases are due to modifications made by Buckland & Taylor
in the design concepts of the seismic upgrading work. This was done
in an effort to ensure a more predictable and less damaging
performance of the bridges during a major earthquake and resulted from
new information from more recent quakes in California and Japan. The
largest cost increase is $2.35 M on the Burrard Bridge, where it is
now proposed to strengthen the seven most critical piers on the
concrete approach spans by completely encasing them in new concrete.
This was previously not included.
In consideration of the fact that the Granville Bridge is the more
important transportation facility for access to the City's downtown
core, it is proposed that all available funding be utilized to upgrade
Granville Bridge, and to defer the final upgrading of the Burrard
Bridge to the next three year Capital Plan. Alternatively, Phase III
seismic upgrading of Burrard Bridge could be done in conjunction with
the proposed bicycle/ pedestrian pathway improvements to effect some
economy in construction if surplus funding from that project becomes
available. This will be reviewed when the final concept for the
bicycle/pedestrian pathway has been selected.
COSTS AND FUNDING - GRANVILLE BRIDGE
The total cost related to the Granville Bridge, Seismic Upgrading
Phase III, including the construction Contract No. 9508 with all
optional work, associated work by City Forces, City Overhead, and a
contingency, is estimated at $5.70 M.
Funding of $4.84 M for Phase III Upgrading has been provided in the
1995 Streets Basic Capital Budget. Additional funding of $860,000 for
Phase III Seismic Upgrading can be provided from the following Streets
Capital Accounts:
14/02/0397/999 $103,000 Surplus Construction Funds -
V i c t o r i a D r i v e B r i d g e
Reconstruction
14/02/0901/999 $457,000 Unused Phase II Seismic Upgrading
Funds - Granville/Burrard
14/33/0012/999 $100,000 Surplus Construction Funds -
Granville Bridge Safety
Improvements
14/33/9811/999 $200,000 Surplus Design Study Funds -
Granville Bridge Safety
Improvements
$860,000
These funds are available as surplus as these projects have been
completed at costs below the budgeted funding.
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