Price to Pioneer Sanitary Relief (12368)

As part of a long-term effort to reduce basement backups and sewer overflows, MSD Project Clear is constructing a project to replace undersized sanitary sewers in the Cities of Olivette and Overland and Unincorporated St. Louis County.

Please note that the map in the presentation was inaccurate. Please find an accurate map below.

Our team of Engineers have determined that the existing wastewater sewer in this neighborhood has issues dealing with higher flows of water which lead to basement backups and sewer overflows.

In addition, there is a known overflow point within this area where untreated wastewater is discharged into waterways during heavy rainfall. That overflow point must be removed in order to clean up our local waterways.

MSD Project Clear is investing approximately $5.2 million to increase the size and depth of the existing sewer.  This will alleviate existing problems resulting from undersized sewers.

• Construction is estimated to begin in winter of 2023.
• MSD Project Clear will replace approximately 5,460 feet of wasterwater pipe.
• The pipe size will increase to between 8 to 30-inches in diameter allowing a larger amount of wastewater to flow through the system.
• This project will remove 1 known overflow point to prevent untreated wastewater from spilling into local waterways.

Type of Construction:

With any type of construction, residents can expect to see and hear heavy equipment during the sewer excavation process. The majority of this project will be constructed by digging through the surface of the ground, in a process known as “open-cut” construction. The pictures above depict what a neighborhood will look like before, during, and after a typical open-cut project.

To minimize traffic impacts, “tunneling” will be used to cross Dielman Road. This means that a hole called a boring pit will be dug at multiple locations to drop a Tunnel Boring Machine underground to dig through the soil and rock. Tunneling is being used in this area to ensure that the surface of Dielman Road is disturbed as little as possible. Tunneling will also be utilized to cross the various railroads in the area to minimize track disturbance.

Traffic Impact: 

As a part of this project, MSD Project Clear does expect traffic impacts to residential streets in this area. Because some of the construction takes place in the roadway, customers may experience lane restrictions or temporary road closures during working hours. MSD will have a traffic mitigation plan to ensure residents have access to homes and businesses.

MSD Project Clear also expects that there will be instances where property owners could have reduced or limited access to their properties due to this project. However, the contractor will be required to maintain access to both residential and commercial properties. The contractor will provide notice to affected residents before construction takes place.

Restoration:

This is the current tentative project schedule. This is subject to change based on a variety of factors including weather.

• Project design completion: Fall 2020
• Easement acquisition completion: Fall 2021
• Estimated construction start: Winter 2023
• Estimated project duration: Two years, Winter 2025

This section will be updated with appropriate documents as they become available.

Mark Dietiker
MSD Project Manager
mdietiker@stlmsd.com
314-768-6380

Mike Bates
Project Manager, Bates Utility Company Inc.
314-575-0311

Jeff McCarty
MSD On-site Inspector
314-267-5268