THE CORPORATION OF THE CITY OF PORT COQUITLAM
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Drawings 5089-7, Sheets 1 and 2 show desirable dyking works
within the City of Port Coquitlam. Drawings 5099-8, Sheets 1 and 2 show
Proposed cross-sections through the new dykes. Some comments relating
to these drawings are included below:

1. Drawing 5099-7 Sheet 1 shows a proposed relocation of the
dyke between Pitt River road and Wilson Avenue on the east side of the
viver. This proposed alignment takes the dyke a considerable distance
from the river and in fact passes it through the location of our present
Welcher Dump. The intention of this relocation is to provide a wider
viver channel and in conjunction with some deepening shown on the cross-
sections, this wider channel would reduce the high water level in the
river upstream of this location during a flood.

2. A new dyke is shown on the west bank of the river between
Scott Creek and the Lougheed Highway to prevent flooding of the west bank.

3. Drawing 5099-8, Sheet 2 shows a cross-section of the river
and dykes in the area from Wilson Avenue to Elgin Avenue. This cross—
section shows that the dyke on the east bank would remain in the present
location but that some vaising of the dyke is required to provide free-
board for the maximum flood. There would appear to be nothing to prevent
the east bank road from being built in conjunction with the dyke and, in
fact, roads make good dykes. Space would of course have to be left for
the Poco Trail.

Drawing 5148-2, Sheets 2 to 4 show the limits of floodins in
the event of a one in tyo hudnred year storm within the City of Port
Coquitlam. It should benoted that these limits are drawn based on the
assumption that the existing dykes would fail.

ovements, it

dykes or river
works. Instead, recommenda flood control works from
the point of view of the protection to Fisheries,

The only formal recommendations which actually involve the City
are no. 6 regarding floodplain zoning and no. 16 regarding the provision
of park land between the dyke and the river. The question of floodplain
zoning has already been talren care of in our new zoning bylaw and the
question of park land between the dyke and the river would appear to be
a non-controversial recommendation. The question of dyking improvements
should, however, be given further consideration in view of the implications
mentioned earlicr in this report,

City Engineer.