Update on Wastewater Efforts In Barnstable Department of Public - - PowerPoint PPT Presentation

Town of Barnstable, Department of Public Works

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Barnstable Town Council

Update on Wastewater Efforts In Barnstable

Department of Public Works January 23, 2020

Town of Barnstable, Department of Public Works

Update Since December Update Since December

• Finalized the Draft CWMP
• Submit Draft CWMP to MEPA

– Expanded Environmental Notification Form (EENF) was submitted on January 15, 2020 – Mill Pond Dredging and other non-traditional projects may be handled as a notice of project change (NPC) to the CWMP. – Keys upcoming dates are:

• Publication in the Environmental Monitor: 2/10/20
• ENF Comments Due: 3/2/20
• ENF Decision, EIR Comments: 3/12/20
• EIR process begins thereafter, timeline will be dependent

upon comments received.

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Town of Barnstable, Department of Public Works

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Town of Barnstable, Department of Public Works

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Non-traditional Focus Area – Three Bays Non-traditional Focus Area – Three Bays

Non-traditional methods.

• Cotuit Bay Inlet Dredging
• Mill Pond dredging
• Abandoned cranberry

bogs conversion

• Warren’s Cove -

aquaculture

• Alternative septic systems
• Permeable Reactive

Barriers (PRBs)

• Stormwater treatment

Town of Barnstable, Department of Public Works

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Sampson’s Island Dredging Sampson’s Island Dredging

Town of Barnstable, Department of Public Works

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Sampson’s Island Dredging Sampson’s Island Dredging

Town of Barnstable, Department of Public Works

Mill Pond Dredging Mill Pond Dredging

• The Issue:

– Mill Pond is full of silt and debris – 9 feet thick in places – In 20 years nitrogen removal capacity has declined from 20% to 10% – Healthy ponds = 30% to 50% – If 50% restored, estimated remove over 2,200 kg/year of additional nitrogen

• The Solution:

– Dredge to its original depths (sand layer) and perimeter – Estimated 30,000 CYs of material (to be confirmed) – Pond depths restored to approximately 8 feet in the deepest areas

• Nest Steps

– Once CWMP approved by MEPA, NPC will be submitted for Mill Pond

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Town of Barnstable, Department of Public Works

Cranberry Bogs Cranberry Bogs

• The Issue:

– Existing and abandoned bogs - Ideal locations for nontraditional solutions

• The Solutions:

– Effort led by BCWC – Conversion to ponds (~50%) – Conversion to wetlands (TBD) – Installation of floating wetlands (8- 15%)

• Next Steps:

– BCWC working with the Town, EPA, UMASS, and Land Owners to pilot potential solutions

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Town of Barnstable, Department of Public Works

• The Issue:

– Currently not appropriate for aquaculture due to silt. – Potential to be nursery for aquaculture farms – The product relocated to established aquaculture farms

• The Solution:

– Dredging Warrens Cove back to a sandy bottom – Establish aquaculture nurseries

• Variety of species

– The Cape Cod Commission estimated that aquaculture beds/floating racks can remove 8-15% of the nitrogen they encounter

• Next Steps:

– Sampling efforts – Meet with regulatory agencies – Permitting

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Warrens Cove Warrens Cove

Town of Barnstable, Department of Public Works

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Town of Barnstable, Department of Public Works

Other Non-traditional Opportunities Other Non-traditional Opportunities

• PRBs

– EPA Demonstration Project

• Prince Cove Area

– Horse Farms?

• Alternative Septic

Systems

– Prince Cove – BCWC efforts at Shubael Pond

• Alternative Toilets

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Town of Barnstable, Department of Public Works

Stormwater Stormwater

• The Issue:

– Stormwater systems are in various states of repair

• The Solution:

– A comprehensive survey identifying those that need repair, or replacement. – Identify new systems/BMP needed to protect water quality – Credit for work already done

• Cotuit Town Dock, etc.

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Town of Barnstable, Department of Public Works

Next Steps Next Steps

• Ongoing public outreach as requested
• Staffing Discussions to implement the plan

– Preliminary Design in house – Final Design by consultants – Construction Administration (CA) and Inspection in-house with some consultant support – WPCF design, CA, and inspection by consultants

• Continuing preliminary design of traditional

projects that are underway

• Permitting efforts
• Continuing to meet with Vineyard Wind

regarding the Strawberry Hill Road Project and Phase II

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Town of Barnstable, Department of Public Works

Discussion? Discussion?

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