Peace Project Water Use Plan - BC Hydro

Peace Project Water Use Plan
Annual Report: 2010
5.1.14.3 Status
Treatment options are further discussed relevant to the type of structures being
prescribed, including concepts for stabilization through incorporating vegetation and
bioengineering into the structure as well as by engineered design of the structure.
Recommendations for sites relying on traditional dikes to impound water include
structures with low slopes (4H:1V or greater), incorporation of woody debris to act as
revetments and/or break waters and capping the structure with gravel/cobble sized
materials. The option of using a geotextile product called a MacTube is also
discussed as another technique to build a dike.
Finally, a number of additional recommendations are made that suggest a step wise
process towards construction of the Demonstration Projects. These include the need
to consider adaptive management as a tool to measure the success of proposed
treatments. Also, co-ordination of the goals and objectives of GMSWORKS 16 with
other work BC Hydro is presently completing in the Williston Reservoir and
information from similar work in other BC Hydro reservoirs will contribute to the
success of trial demonstrations of wetland initiatives in Williston Reservoir.
This project is complete.
5.1.15 GMSWORKS#17 – Williston Trial Wetlands
Order Clause: Schedule A clause 2(a)
BC Hydro Project Manager: Alan Chan-McLeod
5.1.15.1 Overview
Project Objective: The objective of this physical work is to create wetland habitats in
areas that may be dewatered for long periods in order to improve reservoir habitat
and increase the utility of the drawdown zone for some wildlife and fish species.
Wetlands are often considered one of the most productive habitat types in the
temperate region and are one of the habitat types that is significantly impacted when
reservoirs, such as Williston, are created by flooding large valleys.
Project Description:
� Design
� Develop a preliminary engineering design for candidate wetland sites
selected in GMSWORKS #16.
� Develop a final engineering design for each candidate wetland site selected
in GMSWORKS #16.
� Construction
� Implement the engineering design.
� Develop an annual maintenance schedule, as-built drawings, site map,
landscape scheme, and vegetation list for each constructed site.
BC Hydro Page 38