Sunnyside Flood Barrier
Over the last two years, we worked with the community to explore different options for a flood barrier in Sunnyside to help prevent another devastating flood like Calgary experienced in 2013.
Following the results of a Triple Bottom Line evaluation and feedback from the community, Council approved the 1 in 100-year flood barrier height.
Benefits of the 1 in 100-year flood level barrier height?
- It reduces the 2013-level flood risk, which will be further reduced by current and future upstream reservoirs on the Bow River.
- It’s less disruptive to the community look and feel
- It increases the ability to protect vulnerable populations
- It meets the provincial and federal flood standard (1 in 100-year)
- It provides the building blocks for future climate resiliency
Visit our Engage project page to access recommendation documents and FAQs that explain how we evaluated the different options and arrived at the recommendation.
The design for the barrier has moved into the final design and regulatory approvals process. As we work through the technical details of the design we will continue to seek the community’s feedback if there are future opportunities available for public input.
Our aim is to complete construction of the flood barrier in time for the 2023 flood season.
Getting input from the Sunnyside community
View the Sunnyside Flood Barrier Engage Page to learn about previous engagement on this project.
Homes, buildings and other infrastructure in Sunnyside are impacted when river flows reach levels of 927 m3/s (1:10). There is a 10 per cent chance of this occurring every year. Find out if your property is at risk of flooding.
To protect Sunnyside from future flooding, the Flood Mitigation Measures Assessment (FMMA) report, approved by Council in spring of 2017, recommended that a combination of mitigation solutions that work together to create a flexible and adaptable flood risk management program. Each piece of the strategy provides great benefits independently, but together, they ensure the most effective flood protection strategy.
Below is a summary of this multi-measure approach to building flood resiliency that includes the construction of a new upstream reservoir, as well as changes to the TransAlta’s Ghost Reservoir and the construction of community-level flood barriers.
Learn more about Calgary's Flood Mitigation and Resiliency Plan.
The project team is comprised of a group of internal experts and external consultants.
- Stantec Ltd. - Engineering consultant and landscape architects
- Context Research Inc. - Public engagement
Due in part to the geography as well as an outdated drainage system, Sunnyside is more prone to flooding and this is something that The City is working to address. In addition to the flood barrier, there are several projects that have been completed or are currently underway to reduce flooding that happens in the community.
Visit Calgary.ca/sunnysidecdi for a list of projects and up to date information.
Groundwater is an important consideration in the design of the Sunnyside flood barrier. We completed extensive studies to understand the groundwater flow in the area, determine the risk that seepage from the river under the barrier poses during a flood and what options are available to manage river seepage under the barrier.
Visit our Engage project page to view a presentation that explains the study results and the recommendation.
View previous engagement activities, reports back to the community and presentations