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Old Posted Oct 5, 2009, 10:52 PM
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Stingray2004 Stingray2004 is offline
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Join Date: Jan 2004
Location: White Rock, BC (Metro Vancouver)
Posts: 3,145
Regarding a crossing of Shuswap Lake to by-pass Salmon Arm:

An original summary from 14 years ago:

MAK Engineering, Walter Dilger Consulting Engineers Ltd, Colder Associates Ltd.

The objective of this study was to investigate the technical and economic viability of a bridge crossing of the Salmon Arm of Shuswap Lake, as an alternative alignment for Trans-Canada Highway improvement. The study included a video camera survey of highway traffic, directed at a review of several key assumptions related to traffic data.

The present route of the Trans-Canada Highway makes an approximately 29 kilometre loop around the Salmon Ann of Shuswap Lake, passing directly through the urban area of the District of Salmon Arm [population 12,000]. Highway improvement options have for many years considered an upgrade of the existing alignment, and a proposed southerly bypass of the District of Salmon Arm. This study investigated a northerly bypass of the District of Salmon Ann, utilizing a 2 kilometre bridge across Shuswap Lake between Sunnybrae [Tappen] and Engineers Point [Canoe], and compared such an option with improvement through the urban area along the existing TCH comdor or around the community via a southerly bypass.

The concept of a bridge across Shuswap Lake had been considered previously, but rejected because of perceived problems associated with lake depth and engineering. Recent data indicating a much shallower lake bottom suggested that the northerly bypass concept should be revisited.

The study investigated the concept of a combined highway and railway bridge, reasoning that there was significant benefit to relocation of both transportation facilities out of the urbanized area and away from the waterfront.

The work included preliminary structural investigation of bridge options, and a preliminary geotechnical assessment of abutment and lake bed conditions.

And from another engineering study completed years later by Earth Tech:

• Two lane 100 km/h
bypass around Salmon Arm.
• Interchanges constructed at each
end to connect existing TCH.
• 1.7 km long crossing of Shuswap
Lake, two lanes with 2.0 m
shoulders and sidewalk on one side.

1. The bypass is the preferred long term option as it
significantly reduces travel time and would reduce
truck traffic through Salmon Arm. However, the need
for a bypass is beyond the planning horizon for the
TCH corridor.
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