Canadian Consulting Engineer

Geotechnical work beginning at McLoughlin Point

The information will be used to understand subsurface conditions to aid in design of McLoughlin Point wastewater treatment plant.

January 10, 2017   CCE

wastewater

Proposed design of wastewater treatment plant McLoughlin Point (source: CAWTPB Presentation – September 14, 2016)

A release from the Capital Regional District (CRD) of southern Vancouver Island and the nearby Gulf Islands has announced that the Core Area Wastewater Treatment Project planned for the region will begin to gather geotechnical information about the subsurface conditions at McLoughlin Point for the proposed wastewater treatment plant.

The information will be used to locate the top of the bedrock, understand the soils and rock that will be encountered during construction, and to design supporting foundations which will withstand the settlement and seismic forces that may be present.

The McLoughlin Point Wastewater Treatment Plant will provide tertiary treatment to the area’s wastewater. The facility consists of three major components, the treatment facility at McLoughlin Point, a forcemain under Victoria Harbour, and an outfall pipe from the facility to a discharge point off shore.

The geology at McLoughlin Point varies from exposed bedrock to natural and artificial fill. A series of boreholes will be used to determine soil characteristics at key points at McLoughlin Point, along the harbour crossing alignment, and along the outfall pipe alignment. This work builds upon previous geotechnical investigations at McLoughlin Point by locating boreholes in different locations and by conducting different laboratory tests of the core samples.

The geotechnical investigation will take place in three phases:

  • land based drilling at McLoughlin Point beginning January 10, lasting approximately five days
  • following phase will take place along the harbour crossing of the forcemain,  scheduled for the first two weeks of February (approximately 10 days to complete)
  • final phase scheduled for spring 2017 will provide more information regarding the outfall pipe alignment route (expected to take 12 days to complete)

Construction of the Wastewater Treatment Plant will not begin until the Township of Esquimalt issues a development permit.


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