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Staten Island Bluebelt. NYC Department of Environmental Protection July 2,2010. Staten Island Bluebelt. Staten Island Bluebelt Watersheds. 3. Project Background. South Richmond, Staten Island: Last large unsewered part of New York City. Last significant stand of wetlands.

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Staten island bluebelt

Staten Island Bluebelt

NYC Department of Environmental Protection

July 2,2010


Staten island bluebelt1

Staten Island Bluebelt


Staten island bluebelt watersheds

Staten Island Bluebelt Watersheds

3


Project background

Project Background

  • South Richmond, Staten Island:

  • Last large unsewered part of New York City.

  • Last significant stand of wetlands.

  • Failing septic systems and street flooding.

  • Need for new drainage plans that:

    • Provide necessary infrastructure.

    • Preserve wetlands.

4


Project background1

Project Background

  • South Richmond, Staten Island:

  • Drainage plans dating from the 1960’s assumed full sewering eliminating all wetlands.

  • Public policies to protect wetlands:

    • NYSDEC freshwater and tidal wetland regulations.

    • SSRDD enacted Open Space Network.

    • City and state parks created.

  • How to preserve wetlands while providing drainage infrastructure?

5


Staten island bluebelt program overall strategies

Staten Island Bluebelt Program: Overall Strategies

  • Develop storm water management system utilizing existing wetlands.

  • Collect street runoff in storm sewers; improve capacity of hydraulic structures.

  • At sewer-wetland interface, use BMP's to mitigate impacts of urban runoff and local flooding.

  • Build separate sanitary sewer system.

6


Typical schematic of bluebelt drainage plan with bmp s

Typical Schematic of Bluebelt Drainage Plan with BMP's

Storm Sewers

5

Outlet

Outlet

Stilling

Stilling

Extended

Extended

Basin

Basin

Detention

Detention

Existing Pond

Sand Filter

Sand Filter

4

3

NYCDEP

NYCDEP

State

State

Bluebelt

Bluebelt

Wetland

Wetland

Boundary

Boundary

Boundary

Boundary

Micropool

Micropool

NYC Park Boundary

NYC Park Boundary

Forebay

Forebay

6

Upper

Pool

Lower

Pool

2

Micropool

1

Forebay

Forebay

7

Constructed

Constructed

Micropool

Wetland

Micropool

Wetland

8

  • Extended Detention Basin

  • Pocket Wetland

  • Sand Filter

  • Retrofit of Existing Pond

  • Outlet Stilling Basin

  • Culvert Reconstruction

  • Meandering Stream

  • Stream Restoration

7


Staten island bluebelt program planning process

Staten Island Bluebelt Program: Planning Process

Evaluation of

Alternatives

Interagency

Drainage Plan

Coordination

Public

Presentations

Impact Analysis

Draft Environmental

Impact Statement

Regulatory

Public

Agency

Review

Review

Final Environmental

Impact Statement

Final

Designs

Permitting

Construction

8


Bmp rc 4 construction sequence

BMP RC-4: Construction Sequence

Step 1: The site is cleared of debris and brush.

Step 2: The land is excavated and graded to form the desired topography for the new wetlands.

9


Bmp rc 4 construction sequence1

BMP RC-4: Construction Sequence

Step 3: For subsurface preparation, a Claymax

liner, subsoil and topsoil are overlaid.

Step 4: Erosion control mat and wetland plantings are installed.

10


Bmp rc 4 construction sequence2

BMP RC-4: Construction Sequence

Step 5: Storm water is introduced into the constructed wetland.

Functioning constructed wetland after one growing season.

11


Bluebelt field management

Bluebelt Field Management

  • Vactor Operations

  • Maintenance Accessways

  • Perimeter Treatments

  • Field Operations

  • Adopt-A-Bluebelt

12


Vactor operations

Vactor Operations

13


Maintenance accessways perimeter treatments

Maintenance Accessways & Perimeter Treatments

Maintenance Accessways

Perimeter Treatments

14


Adopt a bluebelt program

Adopt-A-Bluebelt Program

15


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