Sewer Extension Authority Supervised Program

In accordance with 10 CSR 20-6.010(6)(A), the Missouri Department of Natural Resources may grant approval of an entity’s sewer extension authority supervised program when the facility has at least one existing treatment plant equal to or greater than one million gallons per day (1MGD). Entities with a department-approved program are exempt from construction permit requirements for collection systems. Department approval may be granted for a period of five years in the applicant’s operating permit. At the time of the operating permit renewal, the sewer extension authority supervised program must submit a request for reauthorization and the department will reevaluate the authority..

As part of the review, the department verifies that the entity has sufficient engineering review capabilities, has defined procedures for review, construction, and inspection of projects done by others and those projects done by the entity, how plans are maintained permanently, and that the entity’s standard plans and specifications meet the minimum requirements in 10 CSR 20-8, specifically

  • 10 CSR 20-8.120 Gravity Sewers;
  • 10 CSR 20-8.125, Alternative Sewers; and
  • 10 CSR 20-8.130, Pump Stations.

Approved sewer extension authority supervised program entities are responsible to permit, inspect, and accept sewer extensions constructed within their municipal boundaries and ultimately discharging to a wastewater treatment facility for which they own and act as continuing authority. With an approved program, the entity may have additional requirements in their state operating permit, such as an annual summary report on the projects undertaken during the previous calendar year.

Entities applying for funding under 10 CSR 20-4, “Grants and Loans” will be required to comply with those requirements in addition to their approved sewer extension authority supervised program.

New sewer extension authority program requests must meet the requirements of 10 CSR 20-6.010(6)(B). Municipality wishing to apply for this program should contact the Water Protection Program’s Engineering Section at 573-751-1300 or

Approved Sewer Extension Authority Programs

City of Blue Springs

City of Columbia

City of Kansas City*

City of Jefferson City

City of Joplin*

City of Springfield *

City of St. Peters

Duckett Creek Sanitary District

Metropolitan St. Louis Sewer District

* Denotes entities currently under review during the operating permit renewal period.

New Program Approval Requests

Northeast Public Sewer District

Additional Information