Potential LID Improvements

Conceptual Site Plan

project details

Working in conjunction with the District Department of the Environment, AECOM, and Limnotech two project sites were selected to be target neighborhoods in evaluating the effectiveness of Low Impact Development and Green Infrastructure technologies in both the combined sewer system (CSS) and the municipal separate storm sewer system (MS4) areas of the Piney Branch Watershed in Washington, DC as part of the Long Term Control Plan Modification for Green Infrastructure. The project site presented here is located in a primarily single-family home neighborhood adjacent to a public school.

As a member of this project team, I was tasked with assisting in locating and designing the LID facilities. Tasks included preparing graphics, modeling stormwater retention in ArcGIS, and construction drawings. 


The project site was modeled and monitored for the months preceding the project to get baseline flow data for the green street improvements. In the graphic above, the green infrastructure practices are added to the baseline model to be analyzed for water quality and quantity calculations.


An integral part to the project was to develop graphics illustrating how the green infrastructure improvements would look upon completion of the project. This phase of the project was influenced by community input. 


Since completion of this preliminary study,  DC Water, along with several other agencies, has moved forward with an official modification to the Long Term Control Plan to incorporate Green Infrastructure Technologies. The report linked below, outlines the modification to the Long Term Control Plan Tunnels partly based on work completed through this project. The beginning pages discuss the modification and its component parts. On page 304 of this document is our published report entitled "TECHNICAL MEMORANDUM NO. 4: THE DISTRICT OF COLUMBIA’S EXPERIENCE WITH GREEN INFRASTRUCTURE."

Installation Photos