aes
Narn
vod.

a
De

ny
ial aesb tanto spainidaste hy re AOSTA VCO EN I rea nga emer dinars te star) :

Kip Gaudry Date: Nov. 27,1991
Deputy City Engineer

From: ikea De Boor Project: No. 228
Project Technician

SUBJECT: DRAINAGE PROBLEM - 1275 DORSET

RECOMMENDATION:

install a ‘SOAK AWAY" style catch basin In low area adjacent to
rasidence.

BACKGROUND:

A letter of concern was written by a resident at 1875 Dorset (see

attached) regarding poor drainage conditions in the lane adjacent

to the house. The existing basemant slab Is approx. 1Zom lower than the lane.
During heavy, rainfalls, run-off water collacts in alow area in the lane

and backs up towards the side door of the house. There is currently

no storm system in this area except for some ‘soak away’ type

oatch basins on Dorset, See attached for location.

This area of Port Coquitlam is fortunate that the ground conditions allow

for surface water to percolate ata quick rate. The existing soak away's have
some measure of success in this area..

There have bean problems reported in this area before partioularily

the Dorset and Salisbury area with cleaning out existing or installing
additional soak-away's being the only present alternative.

SOLUTIONS AND COST:

The existing storm systern on Oxford is a 300mm main approx 1.2m deep
running south to Prairie. To connect to this main now, the possibility of
utilizing this saction when the future system is in place may noi be possible
as depth and size may not be compatible.

One solution to this could be to design the ultimate storm system and
construct to Dorset, this option was not oonsidered for costing.

At preseni there are no plans to continue the ultimate system north of Prairie.
Two options were considered to alleviate the water problems iis the lane
they are as follows: ,

Option 7

A short term solution would be to install another ‘soak away’ catch basin at
the lowest point in the lane adjacent to the house.

These oatch basins will require periodio maintenance to clean out Excess
silt buildup. ITEM | PAGE | |
Cost of installing the oateh b Yipiste approx ™ $4 oOo