THE CORPORATION OF THE CITY OF PORT COQUITLAM 0 lJ N

REPORT APR 17 1878

TOs Mayor and Council April 17th, 1978

FROM: L. Melnechenko, P. Eng., €.t. L.D. Pollock,
Assistant City Engineer City Administrator

Re: Proposed Coquitlam River Bridge

At the request of Council on April 3rd, 1978, the
Engineering Department has completed an investigation and
costing of a complete pedestrian footbridge on the Patricia
Avenue alignment.

Three alternatives are summarized below, but I would
caution that at this stage they are not all comparable.

; The first estimate by Lougheed Machine & Welding Co.
is for a double steel truss bridge, 150 feet long and 5'~1"
wide. This estimate is not comparable with the estimates which
follow because the bridge footings have not been designed by a
registered Professional Engineer. The proprietor of Lougheed
Machine & Welding, Mr. Turner, claims he has allowed for the
cost of footings in his total price but I feel that his price
cannot be accepted as comparable until some engineering work
and costing has been done on the footings.

The second and third estimates are for girder bridges
150 feet long, with walkway widths of 5'-0" for a steel girder
bridge and 10'-0" for a concrete girder bridge, and these pro-
posals are more directly comparable in that aLl aspects of the
bridge design, construction and erection have been allowed for
in the costs shown.

Maintenance in the form of sandblasting and painting will
be required to a greater degree with the steel truss bridge and
to a lesser degree with the steel girder bridge. The concrete
girder bridge will be virtually maintenance free.

The steel truss bridge and the concrete girder bridge
will have a horizontal walking surface while the steel girder
bridge will have a curved walking surface requiring a few steps
at each end.

The other proposals submitted, which are not summarized
here, are all for a substantially greater cost.

The walkway costs shown are based on a crushed limestone
surface about five feet wide with all work beimg done by City
forces.

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