Student populations continue to rise across the country, and school enrollment is projected to continue increasing through 2013. School districts from coast to coast are investing in new facilities or renovating and expanding their existing buildings. McGraw-Hill Construction is predicting an increase in construction activity and spending within the environmental sector over the next couple of years.
Although regulations vary by region and type of project, new construction or renovation and expansion designs almost always include a storm water management plan to protect downstream waterways. No two projects are alike, and with tight budgets and many solutions available, it is important to select a design approach that cost-effectively meets water quality goals and best fits a site’s unique needs. A few recent examples are highlighted below.
University Expansion Project
To accommodate its ever-growing program, the University of Southern California recently built a new facility for its School of Cinematic Arts in Los Angeles. The local regulatory agency required onsite infiltration of storm water runoff with pretreatment. Land was scarce, so efficient use of space was essential. Project Engineer KPFF Consulting Engineers, Los Angeles, chose a below-ground storm water solution in order to maximize the available land.
Elementary School Parking Lot Renovation
Mission Park Elementary, located in Salinas, Calif., had severe parking and access issues. It needed a quick fix prior to the opening of the school year, and the site improvement project triggered a need for storm water management. The city required a low-impact development solution, so rainfall had to be managed on site using uniformly distributed micro-scale controls.
Junior High School New Construction
Bethel School District is one of the fastest growing in the Puget Sound region. Part of a bond passed by voters included construction of Liberty Junior High in Spanaway, Wash. Because the state of Washington has some of the strictest storm water regulations in the country, storm water management was a factor.
The site of the new school was highly infiltrative, so rain gardens were designed for most of the water quality treatment. However, there were a couple of areas impossible to pick up. Project Engineer Coughlin Porter Lundeen, Seattle, specified two CatchBasin StormFilter systems from CONTECH. The catch basin systems utilize the storm water management StormFilter, which is the first proprietary best management practice to achieve General Use Level Designation approval from the Washington Department of Ecology. Siphon-actuated filter cartridges, which trap and adsorb pollutants, feature a surface cleaning system that prevents blinding and extends maintenance intervals.
Portable classrooms were added to the site later in the project, and a third CatchBasin StormFilter was installed to treat the additional impervious area.