Sandstone Tunnel Cleaning Project

MCES Project No. 808841

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Project Update - May 7, 2019.  See Project Updates below.

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​Construction Activities Underway

The intersection of State Street and Stevens Street is now closed to traffic.  The detour route is posted at the link below.  Construction activities started on March 21st at both the George Street location and the intersection of State Street and Stevens Street.  Upcoming work activities are dependent upon weather conditions. Updates will be provided as they are made available.

State Street and Stevens Street Intersection Closure - Detour Route
State Street and Stevens Street Intersection Closure - Bus Route 68 Detour

Project Description

MCES is cleaning a regional sanitary sewer interceptor located on the west side of St. Paul, from March 2019 through August 2019.  The regional sanitary sewer interceptor consists of a 3-ft wide by 8-ft tall sandstone tunnel that is partially lined with clay tile.  The upper portion of the tunnels are exposed sandstone. Recent inspections of the sandstone tunnel indicated that debris removal is needed to maintain sewer operations and improved access is needed for debris removal and future maintenance activities.

A new maintenance hole will be installed on George Street between Livingston Avenue and Robert Street.  The new maintenance hole is necessary to safely access a section of the tunnel.  The work requires digging a 60-80-foot shaft and installing a maintenance hole at street level.  George Street will remain open to traffic; however, a portion of on-street parking will be closed, and crews and equipment will be in a fenced work site for the duration of the project.  It is anticipated that the ground-level activity will occur in March and April, with the remaining work primarily occurring within the tunnel. 

At the intersection of State Street and Stevens Street, additional ground-level work is needed that will require a temporary road closure of the intersection for approximately two months. 

Project Fact Sheet
Project Fact Sheet - Español

February 25, 2019 Open House Notification Letter

Project Updates

Construction Update - May 7, 2019 345 kB

Construction Update - April 5, 2019 263 kB

Construction Update - April 1, 2019 1.3 MB

February 25th Open House - February 15, 2019 729 kB

Project Contacts

For information, please contact:


Call our project hotline: 651.286.8457

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