The purpose of the project was to provide containment and treatment for storm runoff from Mecklenburg County’s North Recycle Center. The 5 acre site is used to temporarily store recyclable materials such as mulch, plastics, paint, glass, paper and discarded appliances. Armstrong Glen services consisted of coordination with County Storm Water, survey, design of BMP’s, preparation of drawings, preparation of specifications, and assistance during construction phase.
Containment and routing of “dirty” storm water was accomplished by constructing a combination of slotted trench drain and trapezoidal earthen channel. Dirty storm water is routed to three separate reinforced concrete forebays, which screen and hold larger trash and distribute screened storm water to three large rain gardens. Level spreaders are used to prevent the concentration of screened water. Rain gardens are composed of a three foot thickness of engineered soil, covered with Bermuda sod. Filtered storm water is collected in six inch HDPE perforated pipes and discharged over land.
Construction was completed during the summer of 2009.