Quabbin Facts and Figures (Source -- Metropolitan District Commission):
Reservoir length: 18 miles
Reservoir maximum depth: 151 feet
Average reservoir depth: 45 feet
Reservoir shoreline without islands: 118 miles
Island shoreline: 63 miles
Reservoir Capacity: 412 billion gallons
Reservoir surface area: 25,000 acres
Top one inch when full: 760 million gallons
Quabbin watershed area: 120,000 acres
MDC-owned land and water: 81,000 acres
Prescott Peninsula: 12,300 acres
Islands: 3,500 acres
Average annual precipitation: 44 inches
Average precipitation yield to reservoir: 50 percent
Average reservoir gain from one-inch precipitation: 1.6 billion gallons