Fraser River Escarpment

The Fraser River Escarpment is an area of geotechnical complexity adjacent to the north bank of the Fraser River from 207 Street to 224 Street with an area of influence extending as far north as 124 Avenue. The crest of the escarpment has experienced occasional sloughs and slides of various degrees over time and has been extensively studied by geotechnical engineering consultants for both the Province and the City since 1979.

Geotechnical Seismic Vulnerability Assessment studies were undertaken in 2004 and 2008. The current City policies regulating development and construction in the Fraser River Escarpment were adopted in 2004.

With the advancement of knowledge of seismic and geotechnical science in the intervening period, it is appropriate to undertake and update the studies and policies.  A gap analysis was completed in 2019 to understand what would be required to update the assessments and policies to current practices. 

A further update is currently underway for a qualitative risk assessment.

Reports

Geotechnical Seismic Vulnerability Assessment of Fraser River Escarpment, Maple Ridge, BC, March 24, 2004
(Note: Appendix I, Appendix II, and Appendix III are separate documents)

Geotechnical Investigation Fraser River, Maple Ridge, BC, February 12, 2008

Geotechnical Gap Analysis Summary, Fraser River Escarpment Area, Maple Ridge, BC, April 10, 2019

Policies


Policy 6.23 - Control of Surficial and Groundwater Discharge in the Area Bounded by 207 Street, 124 Avenue, 224 Street and the Crest of the Fraser River Escarpment

Policy 6.24 - Subdivision of, or building on, Land within 300 Metres of the Crest of the Fraser River Escarpment

For access to the City’s Cone Penetration Test (CPT) data relating to the Fraser River Escarpment, please contact the Engineering Department at 604-467-7339.