District of Sechelt Preliminary Report

District of Sechelt
Bio-Solids Treatment Pre-Design Report
Notwithstanding the access and earthwork difficulties, the District pursued this negotiation and acquired
this site through expropriation. Later difficulties with the mining plan resulted in a substitute offer by CAL
of an alternate site higher up on Dusty Road (Site B).
4.7 Site B
Site B was offered by CAL for consideration as an alternate to Site A. Here again, the condition was that
the site be mined and the gravel extracted prior to construction of the sewage treatment plant. While the
overall area is slightly over 7 Hectares, the net usable area is much smaller when taking into account
these additional factors:
The 30m setback required from the existing creek
Mining of gravels down to elevation 50m ASL
2:1 cut slopes
The remaining site for construction of a sewage treatment facility is approximately 1.6 Hectare. This site
could possibly accommodate a plant of 6000 m 3 /day capacity but would not allow for any future
expansion.
The average finished grade elevation of 50m ASL would result in a pressure in the forcemain of 85 to 90
psi. This pressure is roughly half of what is currently required to pump the full design flow to the Dusty
Road site (170 psi) at elevation 110m ASL.
The site is heavily treed, but it’s expected that all the trees would be removed by the gravel mining
operation. Re-planting would be necessary for screening. Access from Dusty Road is reasonable at the
low end after the mining is completed.
Given the limitations of small net area, this site was not pursued further.
4.8 Site C
Site C (Lot L) lies immediately west of Site B. It has a gross area of 3.5 Hectares and a net area of 2.9
Hectares, excluding the BC Hydro Right-of Way and an easement of the NE corner. The site elevation
ranges from 25m ASL at the low end (west) to 40m ASL at the high end (east). The north-south gradient
is relatively flat.
The site has been partially logged, but the eastern half remains treed. The land is zoned light industrial
and is currently used for nursery operations. The site is large enough to accommodate the facility and
future growth as well as a planted buffer zone. Three phase power runs through the western edge in a
BC Hydro RoW. Access off Dusty Road is good.
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1592.0026.01 / December, 2010
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