The Bordley Randall House is an 18th century home on a 1¼-acre lot, nestled in a city block adjacent to the State Circle in the historic center of Annapolis. The project included pouring a pervious concrete driveway for the historic home.
The contractor's biggest challenge was the historic nature of the site, which meant meeting the historical society's strict aesthetic standards. Physical access was also a significant challenge, as it was limited to a small alley leading into a narrow city street. Contractors protected the structural integrity of the full-depth basements on either side of the alley by using large steel plates to distribute the weight of dump and concrete trucks.
After extensive research, the landscape architect recommended pervious concrete for the new driveway. The concrete contractor made suggestions that would streamline the work and incorporate architectural elements to satisfy permitting authorities.
The final driveway design was 6 inches of pervious over 6 inches of #57 stone. The driveway apron and garage entrances were finished in colored concrete with an exposed aggregate.
This project marks a significant turning point in the use of green construction in historic residential projects. Receiving permission to install a pervious concrete driveway in a historic city center was a feat that sets the standard for future projects. With effective communication and planning, even very challenging sites can benefit from advances in green construction methods.
Owner: Joe Budge, Annapolis, Md.
To see slideshows and details for all entries, visit www.greensiteawards.com