Groton Water Treatment Plant Upgrade
1. Notice of Scoping for the Groton Water Treatment Plant Upgrade
Municipality where proposed project might be located: Town of Groton
Address of Possible Project Location: 1268 Poquonnock Road
Project Description: Groton Utilities (GU) proposes to upgrade its existing Poquonnock Water Treatment Plant (WTP) to address water quality issues. The WTP was originally constructed in 1938 with capacity expansions occurring in 1947 and 1962. The latest renovations to the WTP occurred in 1989 and consisted of major modifications to the chemical feed systems. Realizing that the majority of the WTP components are antiquated, improvements to the facility are crucial for infrastructure sustainability. GU currently provides water to the residents (45,000 people) of the City of Groton and has existing commitments to supply water to several municipalities including Noank Fire District, Groton Long Point, Ledyard, Montville, and Aquarion Water serving Mystic. The plant currently has an approved production capacity of 14 million gallon per day (MGD) and has a maximum flow rate of 20 MGD. However, the City of Groton has incurred a reduction in industrial water demand in recent years. As a result of this reduction, the proposed upgrades will reduce the plant’s capacity from 14 MGD to 12 MGD while allowing the City to meet its existing water supply commitments and the water demands of its existing service area for the next 30 to 50 years.
The project within the Poquonnock Water Treatment Plant includes modifications to the existing low lift pumping station and coagulation mixing process, retrofitting the existing unit 3 settling basins with new dissolved-air flotation (DAF) and granular activated carbon (GAC) filtration processes, retrofitting the existing unit 3 filters with a manganese adsorption process, replacing the existing vertical turbine pumps in-place with lower horsepower intermediate pumping, retrofitting the existing unit 1 settling basin with new high lift and backwash pumping, addition of two (2) new 1 million gallon water storage tanks, converting the existing unit 2 settling basins to backwash recycle tanks, modified residuals management, chemical feed system upgrades, new yard piping, safety upgrades, automation, electrical upgrades including but not limited to standby power generation facilities, and building envelope and building systems improvements including architectural, structural, mechanical/HVAC and electrical, all with a focus on energy efficiency, sustainability and green energy alternatives.
The footprint of the DAF/GAC addition to the existing WTP is 110-feet by 132-feet or approximately 14,534 square feet. The water storage tanks will be 77-foot in diameter and 35-foot high each.
Project Maps: Click here to view a map of the project area.Click here to view a conceptual site development plan for the project.
Written comments from the public are welcomed and will be accepted until the close of business on: Thursday, July 3, 2014.
Any person can ask the sponsoring agency to hold a Public Scoping Meeting by sending such a request to the address below. If a meeting is requested by 25 or more individuals, or by an association that represents 25 or more members, the sponsoring agency shall schedule a Public Scoping Meeting. Such requests must be made by Friday, June 13, 2014.
Written comments and/or requests for a Public Scoping Meeting should be sent to:
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Name: |
Mr. Eric McPhee |
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Agency: |
Department of Public Health – Drinking Water Section |
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Address: |
410 Capitol Avenue, MS #51WAT, PO Box 340308 |
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Hartford, CT 06134-0308 |
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E-Mail: |
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Fax: |
860-509-7359 |
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If you have questions about the public meeting, or other questions about the scoping for this project, contact:
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Ms. Patricia Bisacky |
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Agency: |
Department of Public Health – Drinking Water Section |
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Address: |
410 Capitol Avenue, MS #51WAT, PO Box 340308 |
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Hartford, CT 06134-0308 |
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E-Mail: |
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Phone: |
860-509-7333 |