Valley Drive Sanitary Relief Phase III (13444)

Valley Drive Sanitary Relief Phase III (13444)

As part of a long-term effort to reduce basement backups and sewer overflows, MSD Project Clear is constructing a project to replace approximately 5,500 feet of undersized wastewater sewers in the cities of Clarkson Valley and Ballwin.

About the Project

Public Meeting - October 12, 2021

Project Map

What is the goal of this project?

MSD Project Clear is investing approximately $4 million to improve wastewater sewers cities of Clarkson Valley and Ballwin. The goal is to reduce basement backups and sewer overflows, which occur when the sewers become overloaded during intense rainfall. This project will reduce such occurrences by increasing the size and capacity of the existing sewer.

Project Facts

  • Construction is estimated to begin in January 2024.
  • MSD Project Clear will replace approximately 5,500 feet of wastewater pipe.
  • The pipe size will increase to between 8 and 15-inches in diameter, allowing a larger amount of wastewater to flow through the system.

How will it be built?

Most of this project will be constructed 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.

What can residents expect?

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 on Downall Green Drive, Wetherburn Road, Capitol Landing Drive, Golfview Drive, Del Ebro Drive, Kettington Road and Richborough Road. MSD Project Clear will maintain at least one lane of traffic at all times to allow property owners to enter and exit. Traffic control will be provided as needed.

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.

Restoration: 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.

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.

  • Estimated construction start: January 2024
  • Estimated construction duration: 24 months


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.

For properties without an existing easement, an MSD Right of Way Agent will work with property owners during the easement acquisition process to discuss restoration on their property.

For properties with an existing easement, MSD will restore the area following District policies. Most yard and wooded areas will be replanted using sod or seed and straw. Driveways, walkways, and other hard surfaces will be restored using the same materials that are currently in place.

Streets that are disturbed during construction will be replaced and repaved with similar material. The project’s restoration will meet all local and District requirements.

During active construction, 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 or place steel plates over trenches during non-working hours so residents can use their driveways during those times

MSD will instruct its contractor to keep the site reasonably clean and clear of debris. MSD will have an inspector on site every day during active construction. Prior to the start of construction, MSD will give every resident and property owner along the construction site the inspector’s contact information. Community members are encouraged to bring any concerns to the on-site inspector or any other member of the project team.

Yes. If the contractor disturbs any driveways or other paved surfaces, they will repair them to their original condition or to the specifications of individual easement agreements.

The contractor will fill or cover any open trenches during non-working hours and will likely begin areas where pipe installation is completed in large sections before completing all pipe installation.

MSD does not anticipate construction causing any odor concerns.

No. The contractor will either cover open trenches with steel plates or fill trenches with gravel when they are not actively working.

Stay Informed

Gerald Allen
MSD Construction Supervisor

Rob Pendergrass
PACE Construction