Municipal Roads Program

IDevelopment of the Municipal Roads General Permit 
Documents and Frequently Asked Questions
Permit Development Timeline
Permit Application and Implementation Dates
Municipal Development of a Road Stormwater Management Plan
Permit Requirements for Existing Roads
Permit Requirements for New Projects

Phot of the White River by Carol Langstaff

Development of the Municipal Roads General Permit

This general permit is intended to achieve significant reductions in stormwater-related erosion from municipal roads, both paved and unpaved. Municipalities will implement a customized, multi-year plan to stabilize their road drainage system. The plan will include bringing road drainage systems up to basic maintenance standards, and additional corrective measure to reduce erosion as necessary to meet a TMDL or other water quality restoration effort. The permit is required by H.35/Act 64, the Vermont Clean Water Act, and the Lake Champlain Phase I TMDL.

For more information on the DEC Municipal Roads program and the development of the Municipal Roads General Permit, contact Jim Ryan by email or at (802) 490-6140.

Documents and Frequently Asked Questions

Draft MRGP Standards for Grant-In-Aid Applicants (June 2017)
Municipal Road Inventory and Evaluation Interim Guidance (2017 Field Season)
Draft Inventory Planning Spreadsheet
Draft Framework
Factsheet: Municipal Roads permit development process
Frequently Asked Questions
Water Quality Grants for Municipalities (updated)
**New** Presentation: Development and Components of the Municipal Roads General Permit (PDF version - please contact Jim Ryan for a PowerPoint version)
Intermittent Stream Culvert Sizing Guidance

Permit Development Timeline

MRGP Timeline

Permit Application and Implementation Dates

2018 - 2021
All municipal applications due (specific permit application deadlines TBD during permit development process)

Commencing with permit coverage
Municipal development and implementation of road stormwater management plan
20-year Implementation schedule prioritized by greatest benefit and municipality’s transportation capital plan
Assistance from DEC, VTrans, RPCs, others

Municipal Development of a Road Stormwater Management Plan

image of Hydrologically-connected road segments
Woman with clipboard noting erosion alongside a gravel road
Newly seeded and stabilized roadside ditch along tree-lined gravel road

Permit Requirements for Existing Roads

As a first step municipalities will identify the sections of their road networks that are connected to surface waters through ditches, culverts or other drainage structures. Connected roads present substantially greater risks to water quality.

The second step will involve inventorying the connected portions of their road network to determine if the road and drainage systems meet the new standards. Standards will be consistent with Town Road and Bridge Standards, and will likely include measures such as:

  • Ditches: “U-shaped” and disconnected from surface waters where possible
  • Upgrading road drainage culverts and installing outlet stabilization and/or headers where erosion is present
  • Soils exposed by maintenance would be seeded and mulched or otherwise stabilized

Municipalities will develop and implement a long-term plan to bring all sections of connected roads up to standards.
Class 4 roads that are adversely affecting water quality may require the installation of best management practices to reduce erosion, but will not be required to be open to travel as part of this permit.
Identifying river-road conflict areas to increase flood resiliency
In-Culverts and bridges:

  • No new requirements to replace stream crossings, but may require header or outlet stabilization measures
  • Maintenance and construction activities would continue to conform to the ANR Stream Alteration General Permit.

Permit Requirements for New Projects

Stable conveyances
Designed to Vermont Stormwater Manual if over permit threshold of 1 acre impervious surface, or greater than 5,000 square foot expansion

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