Project Description:

In cooperation with Novak Design Group, Hall & Hall Engineers provided the site design services for the new Hiawatha City Hall. Being within the McCleod Run watershed, special consideration was taken to minimize the impacts this urban site would have on our water systems and the overall environment.

Mitigating storm water run-off and increase on-site infiltration, required several storm water management practices to be incorporated across the entire site. Curb cuts leading into abio-swale island captured substantial runoff contaminants from the parking lot. Another bioretention area near the front entrance managed site run-off from the south half of the parking area, the surrounding lawn is graded into a filtration cell. The rear parking lot uses porous concrete within the parking stalls to remove pollutants coming from vehicles and the surrounding site.

Native forbs and grasses keep maintenance low and provide visual interest throughout the season.