MUNICIPAL STORMWATER INFRASTRUCTURE MAPS, STORMWATER MASTER PLANS, AND ILLICIT DISCHARGE DETECTION AND ELIMINATION (IDDE) REPORTS

neon green water flowing from pipe into a large body of water

In 2000, the Vermont Legislature required DEC to implement a statewide program to promote detection and elimination of improper or illegal connections and discharges. Illicit discharges are discharges of wastewater or industrial process water into a stormwater-only drainage system. The Legislature's intent was to expand illicit discharge detection and elimination (IDDE) efforts from the communities—all in the greater Burlington area—required to perform IDDE in compliance with the EPA’s Phase 2 Stormwater Rule to encompass all developed areas of the Vermont. Following the Legislature's mandate, DEC has assisted municipalities not subject to the Phase 2 Stormwater Rule by mapping drainage systems and performing IDDE.  This work, funded through CWIP ecosystem restoration grants, USEPA Section 319, Supplemental Environmental Fines and the Lake Champlain Basin Program, has been completed for all major urbanized areas in the Missisquoi, Lamoille, Winooski (outside the greater Burlington area), Otter, Poultney, Passumpsic Rivers, Lake Memphremagog Basins the Upper Connecticut River Basin, the three largest Connecticut River Basin towns and the Town of Bennington.  It is ongoing in the White, Black, Williams-West River and Ottauquechee Basins.  

About one-hundred and twenty communities have had GIS (Geographic Information System) drainage maps completed. Stone Environmental, Watershed Consulting Associates and Aldrich-Elliott Engineers in conjunction with several watershed associations (Memphremagog Watershed Association, Friends of the Winooski River and Friends of the Mad River) have or are currently conducting IDDE surveys in forty-four non-designated MS4 communities. Consultants have identified 3,836 discharge points, 1,145 of which were flowing when inspected. A wastewater source was indicated at 230 discharge points. Other types of contamination included petroleum, treated drinking water, heated water, pet waste, mop water, paint and road salt. By combining drainage mapping, environmental investigative work, and municipal cooperation, this effort has eliminated numerous wastewater discharges, decreasing phosphorus by an estimated 275 kg per year to Lake Champlain, and reducing the risk of pathogen exposure. 

Stormwater Master Plans have been completed for about 40 geographic areas including watersheds, subwatersheds, towns and villages.  Available plans can be found and are posted  by the Town Name in which they are located.

Illicit Discharge Detection and Elimination

Status of Illicit Discharge Detection and Elimination Project:
Illicit Discharge Detection and Elimination Project - Status Map (364 KB PDF)

Presentation - March 2011:
Presentation: Illicit Discharge Detection and Elimination (IDDE) Project (4.2MB PDF)

Presentation -October 2012:
Vermont IDDE Project-Center for Watershed Protection Stormwater and Watershed Conference (3.97 MB PDF)

Program reports:

August 2001
Characterization of Outfalls on the Winooski River in Montpelier (1.24 MB PDF)

March 2007
Detection and Elimination of Non-Stormwater Discharges to the Streams of the City of Barre (870KB PDF) 

July 2009
Detection and Elimination of Non-Stormwater Discharges to the North Branch, Dog River and the Stevens Branch of the Winooski River in Montpelier, Berlin and Northfield (4.2MB PDF)

February, 2011
Illicit Discharge Detection and Elimination in Richmond, Waterbury, Moretown, and Waitsfield (3869KB PDF)

March, 2011
Illicit Discharge Detection and Elimination in Six Missisquoi River Basin Communities (3271KB PDF)
Appendices to IDDE in Six Missisquoi River Basin Communities (10.5MB PDF)

January, 2012
Illicit Discharge Detection and Elimination in Brattleboro (6575KB PDF)

December, 2012
City and Town of St. Albans Illicit Discharge Detection and Elimination(IDDE) Study (7.7MB PDF)

January, 2013
Town of Springfield Illicit Discharge Detection and Elimination Study (15MB PDF)

September, 2013
Assessment of stormwater system outfalls in Marshfield, VT (1.1 MB PDF)
Detection of illicit discharge from stormwater system outfalls in Plainfield, VT(1.4 MB PDF)
Monitoring of stormwater system outfalls in Cabot, VT(850 KB PDF)

March 2014
Detecting and Eliminating Illicit Discharges in Rutland County to Improve Water Quality (Castleton, Fair Haven, Poultney, Proctor, Wallingford and West Rutland) (11MB PDF)

May 2014
Otter Creek Basin Illicit Discharge Detection and Elimination Project (10MB PDF)

July 2014
Detecting and Eliminating Illicit Discharges to Improve Water Quality in the Lamoille River Basin (10MB PDF)

October 2014
Missisquoi River Basin & St. Albans City & Town Advanced Illicit Discharge Detection and Elimination Study (1.2MB PDF)
Appendix A (2.8MB PDF)
Appendix B (10MB PDF)
Appendix C-H (5.6MB PDF)

August 2015
Detecting and Eliminating Illicit Discharges to Improve Water Quality in the Lake Memphremagog Basin (Barton, Orleans, Brighton, Newport City, Derby, Derby Line and Derby Village) (6.7MB PDF)
 

August 2015
Detecting and Eliminating Illicit Discharges in St. Johnsbury to Improve Water Quality (9.2 MB PDF)

January 2016
Final Report Bennington and Pawlet IDDE Study
A-1 - Bennington and Pawlet - Results Summary Table
A-2 -Bennington and Pawlet - Mapbook

February 2016
Lake Memphremagog Basin Additional Advanced Investigations

February 2016
Detecting and Eliminating Illicit Discharges in the Stevens Branch Watershed and Stowe

January 2017
Detecting and Eliminating Illicit Discharges in the Upper and Middle Connecticut River Basin: Final Report

Town Stormwater Mapping and Stormwater Master Planning Reports

Status of Stormwater Mapping Project:

Status Map-Stormwater Mapping Project (359 KB PDF)

Stormwater Infrastructure Data Availability:
The geographic information systems stormwater infrastructure data used in these reports is available for download thru the Vermont Center for Geographic Information Systems and as a webmap.  Please note that the VCGI database is updated once per year with data collected in the preceding year so some data illustrated in these reports may not be available through VCGI.  All data used in these reports is also available from the VTDEC Ecosystem Restoration Section. Please contact david.ainley@vermont.gov.
We also provide printable 24 X 36 inch maps of our work in the towns listed below, please click on the town of interest.

Town stormwater mapping reports:

Albany
Alburgh
Bakersfield 
Barnard
Barnet
Barre City 
Barre Town
Barton
Bennington
Benson 
Berlin 
Bethel
Bradford
Brandon
Brattleboro
Bridgewater
Brighton
Bristol
Burke
Burlington
Cabot
Calais
Cambridge
Canaan
Castleton
Cavendish
Chelsea
Chester
Colchester
Concord
Craftsbury
Danby
Danville
Derby
Dummerston
East Montpelier
Eden
Enosburg Falls
Essex
Fair Haven
Fairfax
Fairfield
Fairlee
Fayston
Ferrisburgh
Franklin
Georgia
Glover
Grafton
Granville
Greensboro
Groton
Guilford
Hancock
Hardwick
Hartford
Hartland
Highgate
Hinesburg
Huntington
Hyde Park
Irasburg
Jamaica
Jericho
Johnson
Killington
Londonderry
Lowell
Ludlow
Lunenburg
Lyndon
Marlboro
Marshfield
Middlebury
Middlesex
Middletown Springs
Montgomery
Montpelier
Moretown
Morristown
Newbury
Newfane
Newport Center
Newport City
Northfield
Norwich
Orleans
Orwell
Pawlet
Peru
Pittsfield
Pittsford
Plainfield
Plymouth
Poultney
Proctor
Putney
Randolph
Richford
Richmond
Rochester
Rockingham
Royalton
Rupert
Rutland City
Rutland Town
Ryegate
Sharon
Shelburne
Sheldon
Shoreham
South Burlington
Springfield
St. Albans City
St. Albans Town
St. Johnsbury
Stowe
Stratton
Sunderland
Swanton
Townshend
Troy
Tunbridge
Underhill
Vergennes
Vernon
Waitsfield
Wallingford
Wardsboro
Warren
Washington
Waterbury
Weathersfield
West Fairlee
West Rutland
West Windsor
Westminster
Weston
Winhall
Winooski
Williamstown
Williston
Windsor
Wolcott
Woodstock
Worcester

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