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Wentzville City Hall
310 West Pearce Boulevard
Wentzville, MO 63385
636-327-5101
636-639-2017 fax
Municipal Court: 636-327-5141
Parks & Recreation: 636-332-9236
Public Works: 636-327-5102

Street Movement

Frequently Asked Questions

Below you will find frequently asked questions pertaining to “street movement”.  Please also reference a form to complete at the bottom of the page to schedule an inspection of your property.

Q.        What causes street movement?

A.        In Wentzville, much street movement starts with temperature and moisture changes in clay soil below our concrete streets.  Wentzville soils have high clay content and do not drain well so they freeze and expand as winter temperatures set in.  Expansion of the soil occasionally pushes up on concrete driveways, sidewalks, and pavements creating a condition commonly described as “frost heave”.   As the ground thaws the stopping and turning of vehicles can cause the concrete slabs to slide in small increments on the saturated clay soil.  Another condition contributing to driveway and street movement is thermal expansion and contraction of the concrete itself.    

Q.        Does street movement happen everywhere?

A.        Street movement occurs in many locations depending on the terrain, temperature fluctuations and soil types.  Street movement is often more noticeable at the end of cul-de-sacs, at “T” intersections, on hills and on the outside of street curves.  This is because stopping and turning vehicles are frequently pushing on the pavement at these locations. 

Q.        Has Wentzville done anything to manage street movement?

A.        Yes.  Many concrete subdivision streets were built directly on clay soils.  Our street replacement and new construction standards now include a compacted rock subgrade, pavement underdrains, and full depth pavement expansion joints at intersections, hills and curves.  The City also encourages homeowners, builders, and developers to install full-depth expansion joints at several locations in their private driveways and sidewalks.

Q.        How does Wentzville handle resident concerns about street movement?

A.        When the City receives a concern about street movement, we perform an inspection for misaligned street joints; and gaps along the street edge, sidewalks, and driveway expansion joints.  If street movement exists, the City may remove and replace several street slabs and install pavement underdrains to improve subgrade drainage.  The City may also consider placement or replacement of expansion joints in the street, or between the street and a private driveway. 

Q.        How does the City replace an expansion joint at a private driveway?

A.        If pavement movement exists, and the City inspection indicates the need for replacement of an expansion joint between the street and a private driveway, it is performed at no charge to residents.  This is a service provided by the City even though private driveways are the maintenance responsibility of the property owner.  The City typically removes two to four inches of concrete pavement or driveway slab at the street curb, and then fills in this area with expansion material. 

Q.        Is expansion joint replacement a permanent solution?

A.        Not always.  History has shown that pavements may continue to move slightly.  There have been occasions where the City has provided second replacements of expansion joints due to continuing street movement.

Q.        Is the City responsible for the resulting damage that may occur due to street movement?

A.        Based on current case law (A.K. and Virginia Zumwalt vs. Boone County, MO), municipalities and governing bodies are not responsible for damage on private property that may be associated with street movement in the public right of way.  Consequently, the City’s insurance carrier does not reimburse homeowners.

Q.        What can residents do to lessen the chances their property might be damaged?

A.        Residents should make sure there are full depth expansion joints in place in several locations within their driveway. Some expansion joints do not extend the full depth of the slab and pressure may build up against the lower portion of the driveway slab.  Residents should annually inspect their driveway expansion joints in late spring or early summer and look for signs of joint compression.

If you feel that the street near your home or your private driveway expansion joints are showing signs of movement or increased pressure you may enter a concern with the City by clicking on the “report a concern” link below.  The City will send a knowledgeable and experienced inspector to review your concerns and answer any questions you may have.

 

 

If you feel street movement is occuring near your property you may enter a concern with the City by clicking on the report a concern link below.   The City will send someone to inspect your property.  Report a Concern.

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