Red Brook Harborview

A Sustainable Development for Red Brook Harbor

Red Brook HarborviewA water quality restoration project for Red Brook HarborFar, far exceeds nitrogen treatment requirements in zoning

Immediately reduces nitrogen by 890 lbs/year Potential for town to work with developer to reduce nitrogen

by another 1,578 lbs/year (potential total N reduction: 2,468 lbs/year)

Will help reverse harbor degradation resulting from septic pollution RBH recently named “impaired” under Section 303(d) of Clean

Water Act In total: removes more than 70% of the current site’s nitrogen

loading to Red Brook HarborEstablishes Bourne as a national model for innovative

planning-based solutions to environmental problems Implementation: 15 traditional New England townhomes

forming transition between busy harbor and surrounding residential neighborhood

Kingman Yacht Center

Red Brook Harbor

Marine Center Overlay District(MCOD)

Red BrookHarborview(proposed)

Pollution in Red Brook HarborNitrogen from septic

systems spawns algae blooms

Water becomes cloudy, malodorous

Decaying algae robs water of oxygen

Nitrogen pollution can lead to degradation of shellfish habitat and fish kills

Algae resulting from nitrogen pollution spoils the shoreline of Red Brook Harbor

Solving Water Quality ProblemsRed Brook Harborview

15 townhomes clustered on less than 5 acres

Most advanced wastewater treatment available 15 townhomes = 3,520 gpd @ 5ppm N 2 existing homes on site now using septic

will be removed (660 gpd @ 35ppm N) Result: Net decrease in nitrogen

pollution

Will also connect entire marina to wastewater treatment• Will treat roughly 9,000 additional gallons of existing septic discharge

Total nitrogen reduction for townhomes /marina: 890 pounds per year

Advanced Wastewater TreatmentAquaCELL Moving Bed Biofilm Reactor

(MBBR) Built to treat up to 34,200 gpd

Meets 10 mg/L total nitrogen concentration in the treated effluent (actual is 5 mg/L or lower)

Advanced Wastewater Treatment

Advanced Wastewater Treatment

Existing Wastewater Leaching Field

Forcemain between leaching field and proposed wastewater treatment facility

Cedar Point:50 Existing

Homes

Cedar Point: 50 HomesTreatment facility will have additional

capacity to treat about 50 homes on Cedar Point that only use septic systems today

Town will be offered the opportunity to become partner in bringing wastewater flow to treatment facility

Estimated additional nitrogen reduction:

1,578 pounds per year

Nitrogen Loading Reductions Red Brook Harborview

Location Septic Systems (lbs N/yr)1

Wastewater Treatment (lbs N/yr)2

Nitrogen Reduction (lbs N/yr)

Project Site3 70 54 -16

Kingman Yacht Center 1,020 146 -874

SUBTOTAL 1,090 200 -890

Cedar Point: 50 Homes 1,841 263 -1,578

TOTAL 2,931 463 -2,468

1Nitrogen load calculated at 35 ppm for septic systems.2Nitrogen load calculated at 5 ppm for advanced wastewater treatment.3Site currently has two houses with six bedrooms on septic systems generating 70 lbs N/yr; would be replaced with 32 bedrooms on advanced treatment, generating 54 lbs N/yr.

Nitrogen Loading Reductions Red Brook Harborview

Location Septic Systems (lbs N/yr)1

Wastewater Treatment (lbs N/yr)2

Nitrogen Reduction (lbs N/yr)

Project Site3 70 54 -16

Kingman Yacht Center 1,020 146 -874

SUBTOTAL 1,090 200 -890

Cedar Point: 50 Homes 1,841 263 -1,578

TOTAL 2,931 463 -2,468

1Nitrogen load calculated at 35 ppm for septic systems.2Nitrogen load calculated at 5 ppm for advanced wastewater treatment.3Site currently has two houses with six bedrooms on septic systems generating 70 lbs N/yr; would be replaced with 32 bedrooms on advanced treatment, generating 54 lbs N/yr.

-890

-2,468

-1,578

How Much Nitrogen is That?

At Start-up: -890 lbs/year

How Much Nitrogen is That?

With Cedar Point Added: -2,468 lbs/year

WetlandsMaintains minimum 100-foot wetland buffer; existing

structures to be removed and existing cleared areas restored to natural habitat

Open Space/HabitatLot coverage = 14.8% (MCOD max. = 15%)Open Space Retention = 70% (MCOD min. = 40%)

Environmental/Public Safety

Rivers ActMeets Rivers Protection Act standards of 100-foot buffer;

restoration of Outer Riparian Zone (up t0 200 feet)

Environmental/Public SafetyStormwater Management Low-impact environmental design exceeds local and state

requirements Compact village layout/shared driveways Native landscaping/natural stormwater practices Complies with all 10 MA Stormwater Standards for redevelopment

MassDEP Approval of Hydrogeologic Report Engineering plans in draft Groundwater Discharge Permit pending

MassDOT Preliminary approval from MassDOT has been granted for

conduits under railroad ROW, pending final submission of plans

DesignArchitectureDesigned to fit into traditional

coastal New England styleShingles and quiet presentation,

with retention of trees and naturally vegetated areas for screening

Transition between busy harbor and surrounding residential neighborhoods

Barely visible from Shore Road

Aerial Site View (looking west)

View from Entrance

s

Summary of Benefits: Red Brook Harborview Cleans Up Harbor: Reduces nitrogen pollution, far in excess of

zoning requirements Zoning: Allows small N increase; actual: -890 lbs/year! Total N with town participating (Cedar Point): -2,468 lbs/year! Corrects decades of harbor degradation from septic systems Establishes Bourne as a national model for innovative planning-based

solutions to environmental problems Fiscal Benefit: Likely to be no school-aged children – estimated

increase in tax revenue of $20,000 per year Economically Efficient: Because we are already building treatment

facility, roughly half of sewer costs for Cedar Point would be covered

Reason: Cleaning up the harbor is the right thing to do!