We were retained by the Southern Alberta Institute of Technology (SAIT) to provide preliminary and detailed design for sanitary, water, storm and other services related to their campus expansion.  Effective stormwater management facilities were required on two large development sites for the Center, South, and West Buildings.  Project constraints included a significant impervious surface area characterized by a high peak runoff.

Due to the City's limited storm sewer capacity, the maximum allowable release rates from the site are constrained to 40 L/s/ha.  The main solution to mitigate the high peak runoff from the site into the City’s storm sewer system includes design of an underground storage facility.  The stormwater design includes a 500 cubic meter capacity underground storage system combined with the Vortechs quality treatment system.  Flows between the storage and Vortechs treatment systems are controlled using the Hydrobrake flow control technology.

Scope of work included:

• review stormwater system design challenges and constraints as a part of the overall expansion plan
• provide design services for storm water ditching, piping and underground storage system design
• perform single event and continuous computer XP-SWMM modeling and simulations to identify system constraints and capabilities
• provide innovative storm water management solutions for both quality and quantity management
• provide environmental planning to meet with Federal, Alberta Environment and City of Calgary regulations
• prepare specifications and tendering
• provide storm construction survey layouts, site supervision and provide materials testing
• provide post construction services.