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Stantec outlines alignment, trenching depth and directional drilling as lower-impact option
Summary
Stantec recommended staying mostly in the eastbound lane/shoulder for the 3.5-mile alignment, reported a typical 48-inch trench depth for the force main, and said directional drilling is an option to reduce surface disruption at bridge crossings and other constrained locations.
Stantec walked the committee through the proposed pipeline alignment and construction approach for the roughly 3.5-mile force-main route. The consultants said they attempted to keep the alignment in the eastbound lane and shoulder to limit road impacts and reported that a typical trench depth of about 48 inches was assumed for much of the route, subject to refinement in final design.
The presenters also described bridge crossings and utility conflicts (noting a 16-inch water line, gas and fiber at various points) and said directional drilling is a viable alternative to open-cut trenching where constraints or community disruption are concerns. "This was assuming open cut," Johnny said, adding that directional drilling could be used depending on contractor choices to reduce disruption at constrained crossings.
Stantec agreed to refine profiles and provide better location information for a pressurized sewer reportedly tying in near Sunnyfield's Park; the consultants will attempt to obtain that missing city data for inclusion in the final design package.
