Operate the dam to keep basin level below start of damage of 4.35 Ft NGVD by using pumps and sluice gates to pass inflows against high tide levels.PROJECT PERSONNEL: Owned, Operated and Maintained by the Metropolitan District Commission (MDC) of Boston - (617)727-0488
DRAINAGE AREA: 309 sq. mi.
NORMAL POOL: 2.35 Ft NGVD (704 Acres; 10,540 Acre Feet)
Pumps: 6 @ 1,400 cfs against 9 ft head Sluice Gates: 1-High Level 8 ft x 10 ft Upstream invert = -10.15 Ft NGVD 1-Low Level 8 ft X 10 ft Upstream invert = -18.65 Ft NGVDNAVIGATION LOCKS
PLACED IN OPERATION: May 1978
TIDE DATA IN MDC DATUM (Ft NGVD = MDC Datum - 105.63) Highest Recorded (7 Feb 1978) 116.0 MDC(10.4 NGVD) Mean High 110.5 Mean Low 101.0 Design Tide 113.0