October 10, 2014
To: Cloverdale Community League Board
From: City of Edmonton Drainage Services
Re: Update on Addressing Drainage Issues
In June of this year, the City of Edmonton provided development and drainage information to the
Riverdale, Cloverdale and Rossdale communities during three separate public information sessions. At
those meetings, a number of concerns and questions related to flood risk were raised.
To address the flooding issues, Drainage Services is undertaking an extensive flood risk study of the
three communities. This study is being conducted by the engineering firm Sameng Inc. and will be
completed in early 2015.
The main study objectives are to:
 Conduct a thorough review of existing drainage infrastructure (e.g. sewers, catchbasins, outfalls,
backflow prevention gates, pump stations, etc.) and surface drainage conditions.
 Assess the existing level of service of the drainage and sewer systems, identify areas with
inadequate flood protection and recommend improvements in order to reduce flood risks
 Identify viable drainage and sewer improvement options to reduce the risk of flooding due to
future developments, heavy rainfall and high water levels in the North Saskatchewan River, with
a main goal to increase the overall level of service in the neighbourhoods.
 Determine the most efficient method for which to move forward with flood mitigation planning
and flood risk reduction in the neighbourhoods.
Drainage Services recognizes that parts of the neighbourhoods are within the floodplain of the North
Saskatchewan River and that improvements are necessary to prevent flooding from the river. Concerns
specific to Cloverdale such as outfall gates, infill and roadway development, Gallagher Hill and other
influences on drainage flows will be looked at.
Survey
Sameng Inc. will use a number of tools to gather information, analyze the data and produce
recommendations. One tool is a survey of every resident in Riverdale, Cloverdale and Rossdale asking
about past flooding events or issues that they have experienced. The survey will be sent out soon. All
residents are encouraged to fill it out, whether they experienced flooding or not. The responses to the
survey will provide valuable information on the nature of the problem at specific locations and will assist
in the development of flood reduction improvements.
As we progress through this work, we will keep the community informed. Once the study is complete,
we will share the results. If you have any questions regarding the above, please contact Project Manager
Miressa Fola miressa.fola@edmonton.ca T: 780-496-8970.