Free CDA Online Technical Presentation

The Canadian Dam Association (CDA) is pleased to offer a free online technical presentation on June 18 at 12 p.m. PDT (3 p.m. EDT). The presentation will be delivered in English and hosted by the British Columbia and Territories Directors. All CDA members and other interested non-members are welcome to register. 

Technical Presentation
Jimmie Creek run-of-river project - geohazard and seepage control design of intake structure

Presenters
Evandro Gimenes, P.Eng., PhD, M.ASCE – GGT Civil Geotechnical Consulting Ltd
Richard Norman, P. Geo. – Onsite Engineering Ltd.

Dr. Gimenes and Mr. Norman will be presenting findings from their paper which summarized the evaluation of a debris flow prone drainage and the mitigation measures and seepage control undertaken to protect the intake structure at the Jimmie Creek run of river project, owned and operated by Innergex Renewable Energy Inc. This 62 MW project is located about 90 km northeast of Powell River, BC in the traditional territory of the Klahoose First Nation.  (Please note, the full abstract can be found below.)

Date/Time
Thursday, June 18 @ 12 p.m. PDT

Cost
Free

Register
Register for this webinar at https://register.gotowebinar.com/register/3956920654545402123 

ABSTRACT: The presentation summarizes the evaluation of a debris flow prone drainage and the mitigation measures and seepage control undertaken to protect the intake structure at the Jimmie Creek run of river project, owned and operated by Innergex Renewable Energy Inc. This 62 MW project is located about 90 km northeast of Powell River, BC in the traditional territory of the Klahoose First Nation. Exit Creek, the debris flow prone drainage, flows into Jimmie Creek and the design process needed a diversion channel able to handle a debris flow impact to protect the intake structure. Due to encroachment of the intake structure into the debris flow fan area and the heterogeneity of the variable and erodible glaciofluvial foundation, a 3D seepage analysis was conducted to assess the magnitude of seepage flows and exit gradients. Given the uncertainties in depths of bedrock, necessary excavations and nonexistence of lower permeability strata, the preferred solution was  to  install  a  concrete  bentonite  secant  pile  wall  strategically placed in an area where bedrock was identified, without the need for large volumes of excavations. Associated cost savings to minimize excavations and impacts to project schedule were the key factors to the preferred solution.