The alleyways are expected to provide 96,378 gal of storm water retention per rain event
Harwood Heights, Ill., has approved the construction of two permeable pavement alleyways designed to prevent storm water runoff and flooding. Officials estimate the alleys will provide a total retention of approximately 96,378 gal of storm water per rain event, as reported by the Chicago Tribune.
The project is made possible through a partnership with the Metropolitan Water Reclamation District of Greater Chicago (MWRD). Under the terms of the agreement, MWRD will reimburse the village for 65.8% of the total construction cost, not to exceed $393,984.
The village will be responsible for maintaining the permeable pavement system through regular cleaning and maintenance.
Similarly, MWRD is collaborating with Arlington Heights, Ill., to fund a rain garden and permeable pavement at the downtown police station currently under construction. The funding will represent approximately a quarter of the total cost for the green infrastructure improvements at the police station.