Picard Circle

Construction Update:

Construction of the Picard Circle Infiltration System is nearly complete. The only significant work remaining is paving along Airport Parkway. As part of the City’s paving plan, the entire width of Airport Parkway will be repaved.  


The City of South Burlington Stormwater Utility received a grant from the Vermont Agency of Transportation to install an underground Stormwater infiltration practice in the footprint of Picard Circle. The project includes the design and construction of a stormwater infiltration basin within the City right-of-way (ROW) and drainage infrastructure which would allow for the treatment of stormwater runoff form 15 acres of impervious surfaces.


Currently untreated stormwater runoff generated from a 51 acre drainage area, including 15 acres of impervious surface, discharges directly to the impaired Centennial Brook near the intersection of Airport Parkway and Picard Circle. This project was identified as part of the Centennial Brook Flow Restoration Plan (FRP), prepared by the City of South Burlington, in an effort to reduce flows to the impaired Centennial Brook and improve water quality in the Lake Champlain drainage area.


Based on HydroCAD modeling conducted by the consultant, the project could reduce the peak flow of the 1-year, 24-hour storm event by 87%, from 9.09 cubic feet per second (cfs) to 0.38 cfs.

Funding Sources

This project has received funding support from the Transportation Alternatives Grant Program administered by VTrans. The remaining project costs will be paid using stormwater utility capital project funding.



Page last updated: 8/27/2019