Transportation (TS4) General Permit

The Transportation Separate Storm Sewer System (TS4) General Permit is a new permit that covers stormwater discharges from all Vermont Agency of Transportation (VTrans) owned or controlled impervious surfaces.

The TS4 combines the stormwater requirements for VTrans associated with its designated regulated small municipal separate storm sewer systems (MS4s); industrial activities, commonly regulated under the Multi-Sector General Permit (MSGP); and previously permitted, new, redeveloped, and expanded impervious surface, commonly regulated under State Operational Stormwater permits.

Additionally, in order to meet the requirements of the Lake Champlain Phosphorus total maximum daily loads (TMDLs) and to ensure water quality protection across the entire State, the permit requires VTrans to develop a Phosphorus Control Plan (PCP) for its stormwater discharges in the Lake Champlain Basin and requires VTrans to reduce the discharge of pollutants from the TS4 to the maximum extent practicable (MEP) through compliance with the six minimum control measure requirements throughout the entire State.

For more information, contact Christy Witters by email at or by phone at (802) 490-6173.


The Agency of Natural Resources (ANR) hereby provides public notice of the modification to General Permit 3-9007 for Stormwater Discharges from the Transportation Separate Storm Sewer System (TS4 General Permit).

The Agency is modifying the language in Part 4.1 regarding the applicable water quality standards to be consistent with federal law, modifying the definition of “receiving water” in Part 13 to be consistent with the definition in the Vermont Water Quality Standards, modifying the definition of “feasible” in Part 13 to remove the word “economically,” and deleting the definition of “infeasible” in Part 13 since it is unnecessary.  

The public is invited to provide written comment on the modifications to the TS4 General Permit through the close of business (4:30pm) on Wednesday, November 22, 2017.  

Written comments on the TS4 General Permit should be emailed to Christy Witters at or mailed to:

Christy Witters
DEC Stormwater Program 
1 National Life Drive, Main 2
Montpelier, VT 05620-3522

A public information meeting will be held on Tuesday, November 21 from 1 to 3 pm, in the Winooski Room in the Watershed Management Division office at 1 National Life Drive in Montpelier, VT.  

A copy of the TS4 General Permit and related documents may be downloaded from: 

Hard copies of the draft General Permit and related documents may be obtained upon request.  Requests and questions should be sent to the email above or directed to 802-490-6173.

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