There's a history of the Peace River's clay and silt Slip, Sliding, Away

A rapid flow slide on the Peace River, north-eastern B.C., involving 7 million m³ of overconsolidated clay and silt.  The deposit is approximately 1 km long 

(Fletcher et al., 2001, in review).

Failure behaviour of landslides in clay and silt:                                                   Top

Two large landslides in overconsolidated glacio-lacustrine clay and silt deposits of British Columbia river valleys have been examined.  Both cases are quite similar in their main aspects.  However, their failure behaviour was very different.  One continues to exhibit intermittent, manly ductile deformations with limited mobility, which are typical of compound landslides in stiff clay.  The other suddenly developed into a catastrophic, extremely rapid flow slide of 6.4 Mm3, damming a large river in the course of a few minutes and projecting a wave onto the opposite bank.  A comparison of the two cases has been made and possible mechanisms for brittle flow slide formation have been proposed (Fletcher et al., in review).

 

https://www.eoas.ubc.ca/research/landslides/landslides.htm#lan

Fletcher, L., Hungr, O., Watson, A. and Thomson, B., 1999.  Failure mechanism and behaviour of a large landslide in glacio-lacustrine silt and clay, Chilliwack River Valley, B.C.

Proceedings, Slope Stability and Landslides, Vancouver Geotechnical Society Symposium May, 1999, 55-62.

August 2001

-----------------------------------------

FLOW SLIDES AND FLOWS INVOLVING GRANULAR SOILS

If this profile looks familiar, its just upstream from Fort St. John -- Site C?

 Google Search Criteria: Attachie Slide

 .... Starting about rive kilometer 63, low-lying terraces on the north sied of the valley could potentially be affected by waves caused by landslides orginating from the slopes adajcent to the 1973 Attachie landslide.

Map 8 of 26 – Attachie Slide - Site C

Laila Yuile  Site C aerial photos show mess of mud,water and slides.

************************

The Proceedings of past Vancouver Geotechnical Society Symposiums can be found at the links below.

• 23rd Symposium - Soil Structure Interaction (2015)
• 22nd Symposium - Foreshore Engineering (2014)
• 21st Symposium - Foundation and Lifeline Engineering (2013)
• 20th Symposium - Soft Ground Engineering (2012)
• 19th Symposium - Geosynthetic Reinforced Walls, Slopes, and Earthworks (2010)
• 18th Symposium - Risk and Liability in Geotechnical Engineering (2008)
• 17th Symposium - Geotechnical Engineering for Geoenvironmental Applications (2003)
• 16th Symposium - Foundation Engineering (2002)
• 15th Symposium - Land Reclamation Geotechnique (2001)
• 14th Symposium - Lifeline Geotechnical Engineering (2000)
• 13th Symposium - Slope Stability and Landslides (1999)
• 12th Symposium - Site Characterization (1998)
• 11th Symposium - Forestry Geotechnique (1997)
• 10th Symposium - Earth Retention Systems (1996)
• 9th Symposium - Construction on Peat and Soft Soils (1995)
• 8th Symposium - Deep Foundations (1994)
• 7th Symposium - Ground Improvement (1993)
• 6th Symposium - Geosynthetics: Design and Performance (1991)
• 5th Symposium - Geotechnical Aspects of Contaminated Sites (1990)
• 4th Symposium - Geotechnical Aspects of tailing Disposal and Acid Mine Drainage (1989)
• 3rd Symposium - Risk and Liability in Geotechnical Engineering (1988)
• 2nd Symposium - Earthquake Engineering (1987)
• 1st Symposium - Transportation Geotechnique (1986)

 History of

Vancouver Harbour, B.C. (Canada). - A. D. Swan, 1925

Railway and Vehicular Bridge Across Vancouver Harbour, B.C. (Canada). - A. D. Swan, 1928
First Narrows Water Tunnel: Engineering News Record January 1, 1933 and July 6, 1933, and a paper (author unknown)
The Lions' Gate Bridge - S. M.  Banks, 1942

Granville Bridge Test Hole Logs - City Engineer's Office, City of Vancouver, 1950

Report on Preliminary Investigation of Foundation Conditions of Proposed Port Mann Bridge - R. A. Spence, 1958
Preliminary Geologic Report on Glacial Till and Till-Like Sediments Beneath Piers S4 and S2 of the Port Mann Bridge - W. L. Brown, 1960
Design of the Main Foundations of the Port Mann Bridge - H. Q. Golder and G. C. Willeumeir, 1964
Peat Symposium - Vancouver Soils Group, February 27, 1967
The Function of Shotcrete in Support and Lining of the Vancouver R.R. (Thornton) Tunnel - E. E. Mason, 1968
Earthquake Design in the Fraser Delta - Task Force Report, June 1991 (for comparison the 2007 Report)
Breaking New Ground - Women in Geotechnical Engineering - Anna Lankford Burwash, Geotechnical News, 1997