$20

2017 CGS THUNDER BAY FALL PRESENTATION AND SOCIAL EVENT

Event Information

Share this event

Date and Time

Location

Location

Sleeping Giant Brewery

712 Macdonell St

Thunder Bay, Ontario P7B 4A6

Canada

View Map

Refund Policy

Refund Policy

No Refunds

Friends Who Are Going
Event description

Description

2017 CGS FALL PRESENTATION AND SOCIAL EVENT

Rehabilitating the Hardy Dam for stability and seepage control

And

The Assiniboine Dikes performance and assessment in the 2011 flood event

Presented by Rob Kenyon, KGS Group


Cost : $20 - includes presentations, a brewery tour and 1 beverage token

Place: Sleeping Giant Brewery, 712 Macdonell St, Thunder Bay, Ontario

Date: Wednesday November 22nd, 2017

Time: 6:30pm symposium, 7:00pm brewery tour, 8:00pm presentation


1st Presentation – Rehabilitating the Hardy Dam for stability and seepage control

The R.M. Hardy Dam is a granular fill dam approximately 20 m high by 300 m long, constructed in the 1950’s on thick deposits of soft glacio-lacustrine clay deposits overlying granular till and Precambrian bedrock. The dam was constructed, along with others in the Atikokan area, to allow for drainage and diversion of Steep Rock Lake and the onset of iron ore production in the East Arm of the Steep Rock Lake mine.

Two main problems had plagued the dam since its construction. First, springs were noted in the north bank of Hancock Creek during dam foundation construction for which a shallow underdrain system was installed to relieve these natural groundwater flows. Over time the condition of the underdrain system deteriorated and its effectiveness in relieving foundation groundwater pressures became questionable, with blowouts occurring periodically at the base of the north abutment. Second, flowing artesian conditions developed in the foundation tills under the main dam resulting in very high upward seepage gradients. Some relief wells were installed, but the effectiveness had not been analyzed or modelled.

This paper details recent investigations, modelling, remedial works, and post remedial performance data at the dam, aimed at addressing both concerns.

2nd Presentation – Evaluating the performance of the Lower Assiniboine diking system in response to the record flooding of 2011

The 150 km long Assiniboine River Diking System which forms an integral part of the overall flood protection for the City of Winnipeg had never been tested under sustained flood conditions as it was during the record flooding on the Assiniboine River in 2011. The dikes, constructed between the 1950’s and the 1970’s were tested only once and briefly during the previous flood of record in 1976. During the record 2011 flood, massive seepage and instability issues were experienced along 11 km of the dikes prompting Manitoba to initiate geotechnical investigations, analyses and designs for remediation and upgrading of the system immediately afterwards.

The 2011 dikes had been kept operational only through the emergency efforts of 600 armed forces personnel with massive geotechnical engineering backup. The paper highlights the emergency geotechnical response issues in 2011, and follows with the post 2011 investigations as to most likely causes. The paper includes the results of both transient and steady state seepage and stability modeling of the problem sections of the system and provides preliminary recommendations to upgrade the dikes to current CDA and MI design requirements.


About the Speaker – Rob Kenyon, Ph.D, P.Eng

Rob Kenyon is a Senior Geotechnical Consultant for KGS Group and has a doctorate in Geotechnical Engineering from the University of Manitoba. He has been actively involved in the Canadian Geotechnical Society through much of his 35 year career, serving as Regional Director for Manitoba, Chair of the Foundations Division of CGS, as well as Technical Chair of the 2003 CGS conference. In 1999 he was awarded the Stermac Award in 1999 and in 2012 presented the R.M. Hardy Address to at the CGS national conference. With an active interest in both research and teaching at the University of Manitoba, he continues to serve as an Adjunct Professor and Sessional Lecturer.

For more information please contact Wes Saunders at 807.629.8762 or ThunderBayCGS@gmail.com.


Share with friends

Date and Time

Location

Sleeping Giant Brewery

712 Macdonell St

Thunder Bay, Ontario P7B 4A6

Canada

View Map

Refund Policy

No Refunds

Save This Event

Event Saved