East Watson Sanitary Relief (12152)

East Watson Sanitary Relief (12152)

As part of a long-term effort to reduce basement backups and sewer overflows, MSD Project Clear is constructing approximately 4,580 feet of sewer in the Citys of Sunset Hills and Crestwood. The East Watson Sanitary Relief project will increase the size of the wastewater sewer which will reduce basement backups and prevent sewer overflows in this area. Construction is scheduled to begin in Spring of 2021 with anticipated completion in the Fall of 2022.

About the Project

Public Meeting - May 11, 2021

This project was delayed as MSD’s contractor wated for another utility to move assets in direct conflict with the construction path. The project schedule discussed in the below recording is no longer accurate. Please find the most up-to-date project schedule below under “When will construction take place?”

Project Map

What work is being done?

  • MSD Project Clear is constructing approximately 4,580 feet of wastewater pipe and new structures
  • The pipe size will increase to 8 to 24-inches in diameter allowing a larger amount of wastewater to flow through the system.
  • This project will eliminate one constructed overflow point where untreated wastewater can spill into local waterways.

Why is this project being constructed?

MSD is investing $1.54 million into the Cities of Crestwood and Sunset Hills with this project to alleviate basement backups and clean up our local waterways.

How will it be built?

MSD’s contractor, Above and Below Contracting, will install the pipe by digging through the surface, a process known as “open-cut.” The contractor will dig a trench several feet into the ground, remove the old sewer pipe, and replace it with a newer, larger pipe. They will work section-by-section, and will fill completed sections with gravel or cover with steel plates to reduce traffic disruptions.

How will this affect residents?

With any construction, residents can expect to see and hear heavy equipment during the sewer excavation process. The pictures above depict what a neighborhood will look like before, during, and after a typical project.

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.

Some residents may experience temporary access restrictions to their driveways. The contractor will give all property owners ample notification prior to access restrictions and will ensure access during non-working hours.

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

When will construction take place?

  • Construction start: Mid-October, 2022
  • Construction duration: approximately 12-18 months

Previous milestones:

  • First neighborhood public meeting: April 11, 2019

What will it look like when it's done?

After the contractor installs all new pipes, they will restore the construction site according to all local and District requirements. Properties with temporary construction easements will be restored per the signed easement agreements. Properties with existing easements will be restored to a clean condition such as sodding disturbed areas and replacing disturbed pavement.


MSD does not anticipate sewer service or 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.

Some property owners may experience driveway access restrictions for a short period of time. The contractor will notify property owners in advance of any temporary access restrictions to allow them time to move their vehicles. The contractor will also fill trenches with gravel during non-working hours so property owners can use their driveways during those times.

Trees will 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. Prior to beginning construction, the contractor will survey the construction path. At that time, the contractor will mark trees that are designated for removal. If you have a question about tree removal on your property, please contact Tracy Rodgers, the project manager, at trodgers@stlmsd.com or 314-335-2019.

MSD will remove the existing wastewater pipe for portions of this project and will fill the existing pipe with grout for other portions of this project.

When installing the new pipe, the contractor may be on a person’s property for several days. The contractor will install several sections of pipe before returning to restore the disrupted area, so property owners may experience several days of active construction, a brief delay, and then several days of work to restore the property.

A tentative start and end timeframe for this project is listed above under “When will construction take place?” This schedule is tentative and subject to change based on a variety of factors including weather, conflicts with other utilities, material shortages, and unforeseen rock or soil conditions. We will update this page with any major schedule changes.

The trench itself will be approximately 4 to 5 feet wide, however the construction zone will be wider to accommodate construction equipment and materials. The line of construction will likely be about 15-20 feet wide.

Yes. MSD’s contractor will reinstall any fences it removes during construction unless otherwise directed by agreements with property owners.

Construction will cross into Richview at 10253 Richview Dr. It will then run down the street to 10212 Richview Dr. where it will continue in the backyards of Richview and Kathy.

The light blue spots on the map indicate the locations of pools and other water features. They are not part of this construction project.

Have any more questions? Contact the Project Manager.