THE CORPORATION OF THE CITY OF PORT COQUITLAM

Re:

Flooding -3- Nov 5/81

works to divide the low drainage area from the high drainage area
so as to prevent flooding of the lowlands east of Burns Road. The
design of the outlet works was based on Federal Flood Programme
standards which assumed that a major storm would be carried through
the floodgates whenever the tide was low enough to allow them to
open. There was never any intention of installing enough pumping
capacity to be able to handle the flows instantaneously. However,
some relief could be provided by the installation of the Laurier
Avenue pump station which would add two more pumps to the system
and prevent some of the water from the northern part of the area
from reaching Dominion Avenue.

7. The Wild Duck Inn area - Ditches were high and over-
flowing in this area. This may be due to inadequate capacity
across the highway since the new ditch- constructed north of the
highway was not full. We will be getting together with the Depart-
ment of Highways' Drainage Engineer to review the drainage works
in this area.

8. The industrial area - The Broadway ditch c-verflowed
its banks at several spots despite the fact that we now have more
pumping capacity than we did during the last storm. Flooding was
not as extensive as in 1979 and there was no flooding along Langan
Avenue this time. The solution to flooding in this area would be
the implementation of the drainage programme as reported to Council

previously. .

9. Pitt River Road ~ Pitt River Road was closed as a
result of flooding across the road from the Coquitlam River. This
could have been much worse had the reservoir been full when the
storm started. As it happened, one of the spillway gates at the
dam had to be coened late Saturday afternoon but this occurred
after the intensity of the storm had weakened. We will always be
vulnerable to flooding in this area until the recommendations of
the Coquitlam River Study have been implemented. These recommenda-
tions include a second channel of the river across Pitt River Road
with a second bridge so that the capacity‘of the river at that
point is increased.

Our crews were first called out early on Saturday morning
and remained at work throughout the day. The fact that very littie
damage occurred in the City is due, to their efforts in keeping the
culverts clear and providing sandbags to various individuals who
had drainage problems. I would like to commend their efforts to

Council. He -
Ls 2

FEP/sgg F.E. Peters, P. Eng.,
City Engineer