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Withdrawal Use

Withdrawal Amount

Cohasset Water Department CWD: Sohier Well #1&#2, Elms Meadow Well Hatherly Country Club

3.0 0.17 (Elms Meadow)

0.06

one surface water source (Lily Pond) and one groundwater source (Elms Meadow). The permit requires the town to meet performance standards including a residential per capita water use of 80 gallons per day or less and unaccounted water of 15% or less.

Table 1-4. Water Withdrawal by Watershed

Cohasset Harbor

Watershed

Herring Brook/Lily Cohasset Cove

Pond

The Cohasset Water Department has taken several significant steps in 2005 to protect the water supply of Lily Pond including: 1) The acquisition of 68 acres in the watershed; 2) Installation of 5 new raingardens and two water quality swales to reduce nutrient loading; 3) Installation four stream gauging stations to monitor flow in the watershed; and 4) Retrofitting stormwater structures and landscape improvements to reduce pollutant loading into Lily Pond and the Aaron River Reservoir. The project is to be completed over the next three years. They were unsuccessful in acquiring a 319 Grant to fund the dredging of sediments from a portion of Lily Pond, institute an annual harvest weeding program and implement a lakeshore restoration project to reduce lawn areas around the water treatment plant. The water department anticipates the Elms Meadow well field to be on line in 2006 and they are in the process of relocating both Sohier Wells due to the Greenbush expansion. On November 17, 2005 Cohasset started selling water to Hingham to provide water to the Linden Ponds Development.

Table 1-5. List of Public Drinking Wells in the Gulf and Scituate Harbor Watersheds

SITE_NAME LILY POND AARON RIVER RESERVOIR ELLMS MEADOW WELLS SOHIER G.P. WELL #2 SOHIER G.P. WELL #1

TOWN COHASSET COHASSET COHASSET COHASSET COHASSET

TYPE SW SW GW GW GW

ELLMS MEADOW REPLCMNT WLFD

COHASSET

PW

Water Withdrawal and Flow Restoration Recommended Actions

Watershed-wide Recommendations

¾ Adopt Low Impact Development Bylaws to minimize impervious surfaces and recharge stormwater into native watersheds.

¾ Evaluate feasibility of WWTP effluent reuse as part of the NPDES permitting process. ¾ Reduce irrigation needs by restricting size of lawns. ¾ Add gauges to streams with potential flow impacts. ¾ Identify and map priority recharge areas. ¾ Increase watershed recharge by:

South Coastal Watershed Action Plan 9/12/2006 Watershed Action Alliance

1-18

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