Niagara Region

Hydrogeological and Geotechnical Investigations into a New Drinking Water Intake

Environmental assessment amendment management and detailed design analysis of a new water intake location.

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About

A new raw water intake location was required in response to works be undertaken by Ontario Power Generation (OPG), which will impact the existing intake located on the Welland River.  In response, the Region is moving the intake location approximately 1200 m away, to the Niagara River.

The project involves the installation of a new 900 mm transmission watermain from the Water Treatment Plant, beneath the Welland River to a new pumping station located near the proposed Niagara River intake location.  The investigations and reporting were used to support an amendment to an existing Environmental Assessment (EA) to allow for an effects assessment on the new alternative location, which was not proposed as part of the original EA.  In addition, the data and analysis will be utilized by the engineering firm to design the project and make recommendations for construction methodology including required tunneling methods and shoring design.

Leadership
  • Rob Frizzell Vice President, Hydrogeologist rob@pecg.ca
  • Jay Cole Principal, Hydrogeologist
Client
Niagara Region
Services
  • Hydrogeology
  • Geotechnical Engineering
Date
February 2019 — June 2019

What We're Doing

The hydrogeological and geotechnical investigations involved the drilling and installation of three deep, bedrock monitoring wells to provide input to tunnel design and construction methodology, and ten additional boreholes designed to inform open-cut construction methodology. In addition to standard geotechnical and hydrogeological testing (single well response and pumping tests), a geophysical (GPR) survey was used characterize bedrock conditions beneath the Welland River.

Hydrogeology

Site-specific assessments using engineering and environmental methodologies to characterize the physical and chemical conditions of groundwater chemistry in support of design and permitting for clients in the mining, aggregate, land development and infrastructure sectors.

Geotechnical Engineering

Geotechnical engineering is the study of the behaviour of soils under the influence of loading forces and soil-water interactions. This knowledge is applied to the design of foundations, retaining walls, earth dams, clay liners, and geosynthetics for waste containment.