From Jan. 15, 2025 to Feb. 4, 2025, the U.S. Army Corps of Engineers (USACE) placed federal permit MVS-2022-00172 on public notice. The applicants, St. Charles County and the City of O’Fallon, requested an extension of Lake St. Louis Blvd. from Paul Renaud Blvd. to Route DD. The proposed project is located north of the intersection of Missouri Highway DD and Diehr Road and continues north to connect with Lake St. Louis Blvd. at Paul Renaud Blvd., within the City of O’Fallon and unincorporated St. Charles County, MO. This public notice met the requirements for joint public notice as dictated in 10 CSR 20-6.060 and 40 CFR 121.

The Missouri Department of Natural Resources received significant public inquiry regarding this project. The department's Water Protection Program has state Clean Water Act Section 401 certification authority for this project. However, the department has not received a request for certification at this time. If a certification request is received, any potential certification evaluates whether the activity will comply with applicable water quality requirements. The department’s evaluation is limited to the water quality-related impacts from the activity subject to the federal license or permit, including the activity’s construction and operation.

Notice: The city of O'Fallon and St. Charles County will hold a public open house regarding the proposed Lake St. Louis Blvd. extension project. For more information, review the St. Charles County's St. Louis Blvd. Extension Informational Meeting notice.

If a certification request is received, all associated documents will be made available below. If the department proposes to issue a Section 401 Water Quality Certification, the proposed certification will be made available for public review and comment on the department's Section 401 Water Quality Certification webpage. For questions regarding the department’s authority and the scope of water quality certification, please contact the department's Water Protection Program by email at wpsc401cert@dnr.mo.gov or call 573-751-1300.

For questions regarding this project that are outside of our certification authority, please contact the U.S. Army Corps of Engineers St. Louis District Regulatory Division:

Website: St. Louis District Regulatory Mission
Phone: 314-331-8575
Email: MVS-Regulatory@usace.army.mil

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