Washington D.C. DDOT Green Infrastructure Standards
In 2014, the District of Columbia Department of Transportation (DDOT) released design requirement standards for Green Infrastructure (GI) design, construction and maintenance in the public right-of-way. The intent is to provide stormwater retention to meet the regulatory requirements, along with the infrastructure requirements within the public right-of-way. The standards were developed for Low Impact Development techniques including bio-retention, permeable pavement, and street tree space design.
The District Stormwater regulations require stormwater volume retention on all major construction projects. Both public and private projects constructing in the right-of-way are required to to implement stormwater retention to the maximum extent practicable.
The Standards Manual was designed to supplement the DDOT Design and Engineering Manual, Standard Drawings, and Standard Specifications, and includes new plant lists and maintenance schedules.
These Green Infrastructure Design Standards are now standard for all DDOT contracts awarded by the Mayor of the District of Columbia, the Council of the District of Columbia, and/or the Contracting Officer. The GI Standards are to be used for all design, material control, construction and maintenance of GI within the District’s public space.
Publication Date: May 1, 2014
- District of Columbia Department of Transportation
- Best practice