(These reports are available for view or download in pdf format.)
St Mary Lake Hydrology 2017 Update – St Mary Lake Watershed Water Availability and Demand – Climate Change Assessment 2017 Update: Kerr Wood Leidal; Craig Sutherland, M.Sc., P.Eng., May 2018
Duck Creek Environmental Flow Needs Study
Duck Creek Temperature Study
ECONICS Report: NSSWD Financial Review – November 21, 2017 – This report provides an in-depth look at the District’s financial position, including a look at rates and cost of service and recommendations for the future financial stability of the District.
Phosphorus Sources and Sinks at St. Mary Lake, Salt Spring Island, B.C. – Results of the 2014-15 Special Study & Analysis of 40-years of Water Quality Data; Maggie Squires, Ph.D., Water Matters Consulting, September 20, 2017
Internal Phosphorus Loading in Lakes: How It Works and Why Artificial Aeration Doesn’t Work; Maggie Squires, Ph.D., Water Matters Consulting September 20, 2017
Sustainable Water Management Strategy
Can biomanipulation reduce algal biomass in St. Mary Lake? An assessment of trophic levels & potential interactions in the context of physical, chemical, and biological regimes in St. Mary Lake, by Dr. Maggie Squires, PhD, limnologist, January 16, 2016
A Guide To St. Mary Lake – Use, Misuse, & Disuse of Artificial Aeration, plus What’s Normal for St. Mary & Recommendations for Lake Research, by Dr. Maggie Squires, PhD, limnologist, February 2016
Staff Report – Summary of Dr. Squires reports – Can biomanipulation reduce algal biomass in St. Mary Lake? and A Guide To St. Mary Lake – Use, Misuse, & Disuse of Artificial Aeration, plus What’s Normal for St. Mary & Recommendations for Lake Research
Blackburn Lake Citizen Science Project – Over a 2-year period, a group of volunteer Citizen and Professional scientists closely monitored lake inflows and outflows (hourly to weekly) and the water chemistry of tributary streams and lake water (every other week) at Blackburn and Cusheon Lake on Salt Spring Island, British Columbia.
Report to the Board of Trustees: Lakeshore Property Owners Liaison, Consultation, and Remediation Design Project – Fletcher & Company Municipal Consulting Inc., 2016
Recommendations for NSSWD Parcel Tax Reform – InterGroup Consultants Ltd. 2016
St. Mary Lake Hydrology Report – St. Mary Lake Watershed Water Availability and Demand – Climate Change Assessment: Kerr Wood Leidal; Craig Sutherland, M.Sc., P.Eng. and Wendy Yao, M.A. Sc., P.Eng., June 2015
Maxwell Lake Hydrology Report – Maxwell Lake, Rippon Creek and Larmour Creek Watersheds Water Availability – Climate Change Assessment: Kerr Wood Leidal; Craig Sutherland, M.Sc., P.Eng. and Wendy Yao, M.A. Sc., P.Eng., April 2015
Salt Spring Island 2015 Drought Study
To the Community of Salt Spring Island,
In 2013, North Salt Spring Waterworks District engaged Kerr Wood Leidal Consulting Engineers to assess water availability to meet the District’s licensed allocation for both St. Mary and Maxwell Lakes.
These investigations examined the specific cases of average rainfall, and a single drought year followed by an average year. Recent experience has shown, however, that we are now experiencing low rainfall years in succession. There is certainly the possibility that level 3 or 4 drought conditions could occur in close proximity, with the result that the lakes do not re-fill (spill over the weir) each year. Such events are very dire, and indicate that there is much less water available than previously thought, requiring very careful planning by the District.
In response, NSSWD has developed a Sustainable Water Management Strategy. It clearly lays out what steps, to-date, the District has taken in response to the conclusions and recommendations in the reports, and its assessment of recent trends in rainfall over the past decade. In addition, it identifies further efforts and initiatives required by the District, such as the raising the Duck Creek Weir, working with other agencies to calculate current and future water demand, continued conservation awareness and adopting a precautionary approach to additional water services.
These are the first steps in an ongoing process to manage the water available, under license, to NSSWD. Going forward, environmental monitoring at both Maxwell and St. Mary Lakes will continue in order to improve our current understanding and facilitate implementation of our management plan.
If you have questions or comments please direct them to the to the Board of Trustees by email or letter addressed to 761 Upper Ganges Road, Sslt Spring Island, BC V8K 1S1
Board of Trustees