Reconstruction of Permeable Green Alleys

Washington, DC

KCI was the first to support the District with certified pervious concrete inspectors and project managers in order to provide construction management and inspection services for the D.C. Green Alleys Program. The Green Alley’s project is a joint collaboration between the D.C. Office of Planning (OP), District Department of Transportation (DDOT), the District Department of the Environment (DDOE), and the D.C. Department of Housing and Community Development (DHCD).

The program was implemented in partnership with the DDOE with funding from the American Recovery and Reinvestment Act of 2009. This pilot project incorporated low impact development and sustainable design strategies aimed to reduce the quantity and improve the quality of stormwater run-off within the District’s right-of-way. A stepping stone for other District projects, the Green Alley’s Program showcased the design and construction of a sustainable urban infrastructure that supports environmentally-friendly and healthy neighborhoods.

At the time, D.C. was only the second city in the nation to develop green alleys.

Mary C. Wiedorfer, PE, CCM, PMP, LEED APVice President, Regional Practice Leader

Mary C. Wiedorfer, PE, CCM, PMP, LEED AP

KCI provided comprehensive construction management services for work on this project that included the removal of existing alleys made with non-permeable materials including gravel, impervious concrete or asphalt surfaces and replacing them with pervious concrete. In addition, new storm drain piping and connections to existing structures were included in order to eliminate excess water not readily absorbed into the ground water table. The pervious pavement sections were 8-inch sections on compacted gravel, with a centrally located perforated drainage system to carry off any excess runoff. KCI’s office engineer and on-site inspectors documented work performed, tracked quantities, and ensured the contractor’s work complied with contract plans, scope, standard specifications and ARRA requirements.