In 2018, the R.M. undertook a two-dimensional (2D) hydraulic modelling and mapping study of the South Saskatchewan River flood plain to determine what areas of the flood plain are floodway (no or limited development allowed) and flood fringe (development may be allowed subject to conditions). The modelling determined that some areas are considered flood fringe, however the majority of the floodplain has been identified as floodway.
Based on these modelling results, Council wanted to undertake a feasibility study for flood mitigation options in the flood plain, as a means to see what the result of a dyke would be on reducing the floodway (or other impacts). The focus was on three different options for dykes, including building up Valley Road. Barr Engineering was retained to complete the feasibility study. Design assumptions to evaluate three dyke concepts were developed followed by hydraulic modeling and analysis to assess potential impacts on the flood profile and velocities in this area. The technical memorandum/report documents the final results as well as high level cost estimates.
For more information on the floodplain mitigation feasibility study please contact the R.M. project manager, Jessica Williams at firstname.lastname@example.org 306-975-2136.