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Citation Tetra Tech EBA. 2015. Powell River Regional District: Landslide and Fluvial Hazards Study, Electoral Areas B and C. Prepared for Powell River Regional District.
Organization Powell River Regional District
URL http://www.powellriverrd.bc.ca/wp-content/uploads/PRRD-Landslide-Fluvial-Hazard-Report_IFU_20150904-reduced.pdf
Abstract/Description or Keywords The objective of this study is to identify areas within the coastal portion of Electoral Areas B and C which may be
vulnerable to landslide and/or fluvial hazards. The results of this study will provide the PRRD with a technical basis
for reviewing the adequacy of the existing Development Permit Area (DPA) polygons, and the potential need to
integrate these hazard areas into DPAs for future developments.
1.2 Scope of Services
As outlined in our March 2015 proposal to the PRRD, our scope of work for this study was limited to the following:
 Desktop study of: existing information provided by the PRRD; readily available geotechnical reports; Tetra Tech
EBA project archives; documents, records and web-based information relating to site setting, topography,
geology, terrain, bedrock and soil deposits; and water well records.
 Comparative review of the slope development policies of other, nearby municipalities and regional districts.
 Review and interpretation of available aerial imagery and topographic data in order to identify landforms and
geomorphological processes to facilitate the identification of landslide and fluvial hazards within the study area.
 Site reconnaissance fieldwork in key areas identified from the above tasks, in order to assess the terrain and
slope features, soil and bedrock conditions as well as landslide and fluvial hazard processes.
 Regional hydrological analysis and modeling of flood flows along the major creeks and watercourses.
 Delineation of landslide and fluvial hazard areas based on the topography of the study area and additional
engineering criteria established from the results of the above.
 Presentation of the results of the above in a summary report (this report), including details of the methods used
to delineate landslide and fluvial hazard areas.
LANDSLIDE AND FLUVIAL HAZARDS STUDY – ELECTORAL AREAS B AND C
FILE: V13103482-01 | SEPTEMBER 4, 2015 | ISSUED FOR USE
2
PRRD Landslide Fluvial Hazard Report_IFU_20150904
1.2.1 Exclusions
The following items are excluded from our scope, as previously discussed and agreed to with the PRRD:
 Assessment of coastal hazards including sea level rise, storm surges, wave hazards and coastal erosion.
 Assessment of Tsunami hazards, which are addressed in a 2007 study completed for the PRRD.
 Assessment of seismic (earthquake) hazards or related phenomena.
 Assessment of wildfire hazards.
 Assessment of snow avalanche hazards.
Information Type report
Regional Watershed Howe Sound & Sunshine Coast
Sub-watershed if known
Aquifer #
Comments
Project status complete
Contact Name
Contact Email