Combined Sewer Overflow Project

Project Title
MCSO 09-11
ARRA Project Number: AR1-016

When Montpelier was first developing as a City, the sewer system was constructed as a Combined Sewer Overflow (CSO) which means that both the storm water and sanitary wastewater were carried by the same pipes, which poses problems with overall capacity. Over the past 10 years, the City has been working towards separating the storm and sanitary sewer system, but there is still much work to be done.
Project Description
The project consists of storm/sewer separation on 5 streets. The locations include Lower State Street (adjacent to the Dairy Creme), Main Street (in front of the Kellogg Hubbard Library), Graham Terrace, Richardson Street and McKinley Street. All of the projects locations will involve the installation of a new storm water collection system including new catch basins.

A total of about 2,200 feet of new storm drain piping will be installed under this project along with 35 new underground storm drain structures. Graham Terrace and Richardson Street will have full width pavement overlays and the other streets will be paved over the new utility trenches and other areas disturbed during construction.

Special project note: Some traffic delays should be anticipated in conjunction with this project.
Graham Terrace street view with white home and snow on the ground.
People in Charge
State Representative
Al Lewis, P.E.
Vermont ANR, DEC

Project General Contractor
S.D. Ireland, Inc
Williston, VT

Project Resident Engineer
Lynnette Whitney, P.E.
DuBois and King
Project Engineer

Municipal Contact
Kurt Motyka, P.E.
City of Montpelier
Assistant Engineer

Project Cost / Funding Split
  • Estimated Total Construction Cost: $531,500
  • Funding: 50% Federal, 0% State, 50% Local
Project Schedule
  • July 6 - July 9: Graham Terrace pipe work and road reconstruction
  • July 8 - July 9: Main Street final paving
  • July 19 - July 30: McKinley Street pipe work
  • August 2 - August 3: McKinley Street cleanup August 4 - August 13 Lower State Street pipework
  • August 16 - August 20: Graham Terrace and McKinley Street final paving
  • September 13: Lower State Street final paving