ft HD Li actin eck ae a AoM Ee ome

2.00 SANITARY SEWER

2.01

2.02

2.03

In January 1983, our Camex Development Appraisal discussed two alternatives:

~ Sewers along Oxford to Mason, and westward down the escarp- ment to Oxbow; and

- internal sewers in proposed road "D" of the Beecam

subdivision.

‘In February we received plans showing a third suggestion:

- the sewer from Camex, crossing the escarpment to connect te the private system in the River Springs strata corpora- tion.

In each case, Sewage passes through the Oxbow pump station and reaches the Green Acres pump station via a pressure sewer under the Coquitiam River. Capacity of the two pump stations is a limiting factor on the development area possible in the NE sector.

The proposal advanced by Camex is somewhat less expensive to the Developer and other options but costs the adjoining property-owners more.to service their lands. In addition, the alignment cuts across the escarpment above River Springs, and requires careful examination in the light of recent geotechnical reports by

Golder Associates.

Golder Associates found an existing slope on the south and west Sides of the Camex site, Standing from 25 to 30°, may be considered Stable against deep-seated slope areas, but are probably subject to

continual erosion and gully formation owing to surface run-off.

Existing tree cover on these bluffs south and west of the Camex site.now control the erosion and gullying to a degree. However,

‘when this vegetative cover is disturbed by construction then “eraston and the formation of: drainage gullies is likely, unless

countermeasures are taken. In the extreme case, there may be slope failure attributable to the progressive erosion of disturbed soils. Construction on.these sensitive lands will disturb the soiJs and the alignment proposed by Camex has considerable potential to create a future erosion problem.

The alignment of the David/Pathan Connector will require extensive excavation adjacent the Camex site. To clear the roadways, the Proposed sewer must be located at a depth of almost 9 m, below the Proposed roadway surface. This depth increases the problems of construction disturbance and removal of natural vegetation, since excavation in the scarp area will extend the width of the very deep ditch. . Another alternative that has been discussed jis to