Pontoison Drive Stormwater Improvements

City of Manchester, Missouri


Residential yard flooding was impacting the properties of Pontoison Drive. Horner & Shifrin provided conceptual plans and design documents for improvements to capture stormwater from neighboring properties by use of a large berm and new inlets.  The pipes were connected to the existing sewer infrastructure and conveyed downstream to a small creek.  H&S personnel met with the Aldermen, residents, and City officials to gain support to acquire easements from the residents.  H&S provided survey, engineering design, easement documentation, construction administration, public involvement, and sewer district approval for construction permits.  The final solution included 376 linear feet of 12- to 18-inch sewer pipe, four new inlets, and almost 3000 linear feet of reinforced-turf covered earthen berm.

H&S Construction Services removed “Clearing” items listed in the Standard Construction Specifications for Sewers and Drainage Facilities, Metropolitan St. Louis Sewer District along with the removal of 12 trees on the project.

H&S Construction Services personnel supervised the use of “RECP” Rolled Erosion Control Product for erosion protection and removal and replacement of permanent fence material.  Utility coordination involved work with a Certified Arborist to take steps to preserve and protect trees that were indicated on the project plans.  Connection of Storm Sewer to Existing Structure involved placement of 4 Single Area Inlets, placement of 12 & 18 inch PVC Pipes, Erosion Control devices and the protection and restoration of the site.





Manchester, Missouri

Year Completed


Innovation. Agility.
Reliability. Horner & Shifrin.