Sigma Engineering Hydropower and Water Resource Engineering Consultants

Water Resources Experience

Columbia River – Flow Regime and Operations Review

(Department of Fisheries and Oceans)

Analysis of the hydrology of the Canadian portion of the Columbia River, including details of the operating regime under the Columbia River Treaty and Non-Treaty Storage Agreements.

Shuswap River Flow Availability

(BC Hydro)

Sigma provided engineering design, approvals and tender for the Water to Wire Turbine Supply contract and the General Construction contract, services during construction and commissioning for two run of river projects totaling 20 MW installed capacity. The project, located near Terrace, British Columbia, was completed in 2015.

Premier Gold Project

(Boliden Westmin Ltd)

Review of another consultants estimate of the PMF and calculation of a revised value of the PMF as part of the overall mine closure plan.

North Shore Vancouver

(Greater Vancouver Water District)

Provision of a low flow return period analysis covering 3 basins and up to 70 years of data. Daily flows with and without primary and secondary storage were analyzed to determine the population support capacity of the system.

Review of the Snow Survey Program

(BC Ministry of Environment)

A review of the current provincial snow survey program to determine its importance and efficiency was carried out which included extensive interviews, preparing questionnaires, analysis of responses, review of organizational structure, review of strategic plans and policies and analysis of operational activities.

Premier Mine, Stewart

(Westmin Resources Ltd)

Hydrology and hydroelectric feasibility study for the Premier Gold Project. The studies required estimation of low flows and snowpack surveys.

North East Coal Development Area

(Teck Corporation)

Hydrology studies to establish the major and minor drainage systems for the Bullmoose Mine, based on regional records and supervised flow monitoring programs.

Fish Flow Overview Study

(BC Hydro, Environmental Resources)

Assistance with research for and preparation of an overview report on existing and potential impacts of all BC Hydro hydroelectric facilities on fish and aquatic habitat.

Yukon Territory

(Territorial Government)

Comprehensive study of hydro power potential covering regional analysis of available flow records to determine design flows and reservoir storage analysis for approximately 100 potential projects.

Stream Flow Gauging

(Various Locations)

Design and installation of stream gauging and monitoring systems (including automatic rainfall recorders) for the District of Surrey, BC Hydro and several mining companies.

Vancouver, British Columbia

(Pacific National Exhibition)

Assessment of the fire flow capacity of the watermain system within the Pacific National Exhibition using the Waterworks modelling program, followed by design and construct services for improvements.

Iskut and Bella Coola

(Iskut Band Council and Bella Coola Band Council)

Design and construction supervision of water improvements for a subdivision, including well pumping, storage tank and distribution system.

Clayton Falls, Bella Coola

(Swift Power LP)

Design and project management of 1300 kW addition to an existing BC Hydro facility as an independent power project.

Maple Ridge – Pacific Marine Training Institute

(Firefighter Training School)

Design of award winning effluent control and treatment system of fire fighting wastewater involving carbon filtration and ground disposal, with ongoing quality monitoring.

Christina Lake Assessment of Water Quality Data

(Ministry of Environment, Environmental Protection)

Compilation and analysis of water quality data, water use information and potential water quality problems for Christina Lake, BC