Water Stewardship Information Sources

Citation Kerr Wood Leidal Associates Limited. 2010. Lillooet Lake Lowering Analysis. Prepared for Pemberton Valley Dyking District.
Organization Pemberton Valley Dyking District
URL http://www.pvdd.ca/images/uploads/Lillooet_Lake_Technical_Memorandum_FINAL.pdf
Abstract/Description or Keywords The Pemberton Valley Dyking District (PVDD) has been addressing flood protection
issues and maintaining flood protection works in the Pemberton Valley since its inception
on January 31, 1947. In 2002, Kerr Wood Leidal Associates Ltd. (KWL) produced the
“Engineering Study for Lillooet River Corridor” (KWL, 2002), which included:
a review of previous engineering studies and works from 1946 to 2002;
an analysis of fluvial geomorphology for the Lillooet River corridor;
an analysis of historical climate and hydrology for the Pemberton Valley and
estimates of peak flows and lake levels at various return periods;
development of a one-dimensional hydraulic model (Mike11) for the Lillooet River
and flood profile estimates for the valley;
an assessment of the existing flood protection network;
recommendations for upgrades to flood protection;
initial recommendations for gravel management in the Lillooet River; and
recommendations for implementation of further flood protection works.
Technical Memorandum – Lillooet Lake Lowering Analysis
December 3, 2010 2
One question that has been raised periodically throughout the operation of PVDD is
whether lowering of water levels in Lillooet Lake would have a significant, positive
impact to the flood profile in Pemberton.
The purpose of this analysis is to address this question through a brief hydraulic
modelling exercise and through a review of existing information.
Information Type report
Regional Watershed Howe Sound & Sunshine Coast
Sub-watershed if known Lillooet River
Aquifer #
Project status complete
Contact Name
Contact Email