A. Morton Thomas & Associates
Lee & Associates
The Washington DDOT Sustainable Streetscape project involved developing sustainability standards for all future street construction and tree plantings. Pine & Swallow worked with A. Morton Thomas & Associates and Lee & Associates to establish standards for permeable pavement design, stormwater bio-treatment, and street trees/structural soils. Sand Based Structural Soils beneath sidewalks is used to support street trees and for infiltration and biotreatment of stormwater. This work created strategies and specifications suitable for projects on all DC streets, ranging from local street improvements to major construction projects.