St. Joachim’s Sanitary Relief (12214)

St. Joachim’s Sanitary Relief (12214)

As part of a long-term effort to reduce basement backups and sewer overflows, MSD Project Clear is designing a project to replace approximately 3,700 feet of undersized wastewater sewers in St. Ann.

This project is estimated to begin construction in the Fall of 2023.

About the Project

Pubic Meeting - October 5, 2022

Project Map

Why is this project being designed?

As part of their evaluation, our team of engineers determined that the sewer in this neighborhood is undersized. During intense rainfall, the sewers become overwhelmed leading to basement backups.

What is the goal of this project?

MSD Project Clear is investing $2.3 million to design and construct this project to increase the capacity of the existing sewer which will reduce the likelihood of basement backups during heavy rainfall.

Project Facts

  • Construction is estimated to start in Fall of 2023
  • MSD Project Clear will replace approximately 3,700 feet of wastewater pipe.
  • The sewer size will increase to 15″-30″ in diameter.

What can residents expect?

Type of Construction:

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.

With any type of construction, residents can expect to see and hear heavy equipment during the sewer excavation process.

Traffic and Access: 

As much of the construction will take place in the street, residents should expect temporary lane closures during active construction hours. At the intersection of St. Katherine and St. Joachim, St. Katherine east of St. Joachim will likely be closed as construction progresses through this area. St. Katherine residents will be able to enter and exit from the other direction. MSD Project Clear will maintain at least one lane of traffic at all times to allow residents to enter and exit.

Similarly, construction may lead to temporarily limited access to some properties along the construction route. Restrictions will be limited to active construction hours, and the contractor will notify property owners in advance of any access restrictions.


After all new sewer pipes are installed, the contractor will restore the construction site according to all MSD and local requirements. This could include sodding any disturbed areas, replacing disturbed pavement, reinstalling fences, etc. More detail on this will become available after a contractor is selected.

At least one MSD Inspector will be on-site part of the day for every day the contractor is working.

What is the timeline?

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

  • Project design completion: Spring 2023
  • Easement acquisition completion: Not Applicable
  • Estimated construction start: Fall 2023
  • Estimated project duration: 12-18 months


Trees may need to be removed to construct parts of this project. If there are good options to avoid removing trees, MSD will make every attempt to do that. Property owners with trees that will need to be removed that are not located in already existing easements will have been compensated for the removal through the easement acquisition process.

While MSD’s contractor is connecting a home’s lateral to the new wastewater sewer, they may ask residents to limit water use. In general, this process can take between two to five hours, depending on the complexity of the connection. The contractor will notify property owners in advance.

MSD does not anticipate other utility services being disrupted during this project. We will work with Missouri One Call to locate utilities before beginning construction. Occasionally, the contractor may run into utilities that were not located by Missouri One Call which could result in temporary utility disruptions. If this happens, MSD will work with the utility to restore service as quickly as possible.

Stay Informed

Jennifer Gerwitz
MSD Project Manager 

Sandy Wagner, PE
Project manager, TREKK Design Group