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Tisbury MA Impervious Cover Disconnection (ICD) Project: An Integrated Stormwater Management Approach for Promoting Urban Community Sustainability and Resilience

A technical direct assistance project funded by the U.S. EPA Southern New England Program (SNEP)

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The Tisbury ICD Project arose in 2017 out of a request by the Martha's Vineyard Commission (MVC) to discuss environmental challenges faced by Martha's Vineyard including potential opportunities for EPA SNEP-funded technical assistance to address water quality impacts to Lagoon Pond resulting from uncontrolled nitrogen discharges. As a result of EPA's Sept 2017 meeting with MVC, EPA became aware of stormwater-related flooding and water quality problems in the Town of Tisbury. These problems represented an important, unique and challenging opportunity to address impervious cover disconnection (ICD) in an urbanized context – a further extension of work both EPA Region 1 and the UNH Stormwater Center had been conducting (e.g., EPA's Opti-Tool model; UNH's Berry Brook Dover, NH) but with the added complexity of addressing ICD-related flooding in an urban context having significant topological slope leading down to a business district located near the ocean. The business district experiences chronic (if not acute) flooding on a regular basis.

The goal of the project is to identify, assess and quantify opportunities for the disconnection of impervious cover (IC) within a geographically-constrained urbanized New England community located near the southern New England coastline. The community, the Town of Tisbury (Town), had requested assistance from the EPA Region 1 to address chronic (even acute) flooding and the generally poor transmission of stormwater runoff related to and resulting from IC and older stormwater infrastructure. An equally important project goal is building an understanding and capacity for integrating green infrastructure (GI) and other stormwater control measures (SCM) into municipal land use decision making. This collaborative project is intended to achieve innovative and cost-effective management of stormwater for a broad range of management objectives (e.g., volumetric control (flooding); reuse, resilience and sustainability; control of pollutants and protection of sensitive surface waters).

More information, including background information with links to pertinent information is provided in the documents referenced below. EPA welcomes the interest and input of all Martha's Vineyards towns / communities, as well as the general public that may be interested in stormwater and IC disconnection.

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EPA's Project Team Consists Of:

EPA Region 1 and Contractors:
Project Partners:

The overall organization of the Project (by Task) is set forth below, along with a proposed schedule. As they become final, Project Reports (deliverables) are provided below:

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Project Background:

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Project Deliverables:

[TBD] = "To Be Developed"

Task 0: Work Plan and Schedule (PDF) (17 pp, 469 K)

Task 1: Prepare Quality Assurance Project Plan (QAPP)
Task 2: Project Management and Administration

Task 3: Municipal Coordination Meeting  (PDF) (93 pp, 12 MB)

Task 4: Stormwater Management Assessment for the Town of Tisbury, MA
  • Subtask 4A. Watershed Characterizations through Geographic Information System (GIS) Spatial Data Analyses
  • Subtask 4B. Opti-Tool Analyses for Quantifying Stormwater Runoff Volume, High-Flow Rates and Pollutant Loadings from Watershed Source Areas [TBD]
  • Subtask 4C. Develop High Runoff Flow Rate Metric(s) to Evaluate Source Area Contributions and GI SCM Reduction Benefits [TBD]
  • Subtask 4D. Develop Planning Level GI SCM Performance Curves for Estimating Cumulative Reductions in SW-Related Indicator Bacteria [TBD]
  • Subtask 4E. Identify Green Infrastructure Stormwater Control Opportunities and Potential Management Strategies for Tisbury [TBD]
  • Subtask 4F. Conduct Field Investigations to Further Evaluate Community GI SCM Opportunities and Strategies [TBD]
  • Subtask 4G. Develop GI SCM Conceptual Designs [TBD]
  • Subtask 4H. Quantify Benefits for Municipal Long-Term GI SCMs Implementation Strategies [TBD]
  • Subtask 4I. Develop Streamlined Technical Support Document to Quantify Benefits of GI SCMs for IC Disconnection [TBD]
  • Subtask 4J. Final Project Meeting and Final Project Report [TBD]

Task 5: Develop Streamlined Technical Support Document for Developing Long-Term Community SCM IC Disconnection Strategies [TBD]

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Proposed Project Schedule:

Proposed Project Schedule for Tisbury MA Impervious Cover Disconnection ProjectView a larger version of this image.

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USEPA Project Leads
Ray Cody (
Surface Water Branch
Phone: (617) 918-1366

Mark Voorhees (
Newt Tedder (
Suzanne Warner (
NPDES (Stormwater) Permitting

USEPA SNEP Coordinator:
Karen Simpson (
Watersheds and Nonpoint Source Unit
Phone: (617) 918-1672

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Project Partners:

Town of Tisbury
John "Jay" Grande
Town Administrator
51 Spring St.
P.O. Box 1239
Vineyard Haven, MA 02568
Phone (508) 696-4200

Melinda Loberg
Town Selectman

Ray Tattersall
DPW Director

Martha's Vineyard Commission
Adam Turner
Executive Director
33 New York Avenue
P.O. Box 1447
Oak Bluffs, MA 02557
Phone (508) 693-3453

Sheri Caseau
Water Resources Planner

Tisbury Waterways Inc.
Gerard Hokanson
P.O. Box 4375
Vineyard Haven, MA 02568
Phone (774) 563-5616

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Tisbury MA Impervious Cover Disconnection (ICD) Project Documents