Perry Street Storm Sewers

City of St. Charles, Missouri


Horner & Shifrin provided topographic and boundary survey and civil engineering services to the City of St. Charles for the Perry Street Stormwater improvements project for replacement of an undersized storm sewer systems through historical downtown St. Charles.  Existing pipes in unknown locations were investigated for type, size, and connectivity.

H&S recommended to tunnel beneath historic Main Street to provide pedestrian and vehicular traffic circulation during construction to businesses that would be greatly affected by impacts. This also minimized impacts to historic brick streets and monuments. The final design included over 2,000 feet of storm and relocated sanitary sewer, inlet capacity calculations, field research, easement documentation, hydraulic analysis, cost estimating, and creation of project specifications.  H&S also coordinated with the City, US Army Corps of Engineers, and the Missouri Department of Natural Resources for permitting approvals.


Project Scope




Site Size

2,000 feet


St. Charles, Missouri

Year Completed


Innovation. Agility.
Reliability. Horner & Shifrin.