Design Criteria and Construction Specifications

The following St. Charles County design criteria and construction specifications may be downloaded:

• Design Criteria for the Preparation of Improvement Plans (PDF)
• Standard Specifications for Subdivision Street Construction (PDF)

Storm Sewer Construction

Storm sewer construction within St. Charles County is regulated by the Metropolitan St. Louis Sewer District’s Standard Construction Specifications for Sewers and Drainage Facilities, 2009, which may be downloaded from the MSD website.