Sebago Lake Facts

Length	12 miles
Great Basin Width	5 miles
Jordan Bay Width	2 miles
Sebago Lake Basin Width	1 mile
Shoreline Length	105 miles
Maximum Depth	316 feet
Mean Depth	101 feet
Volume	995 billion gallons
Residence Time	5.1 years
Orientation of Main Axis	NNW

Water Inflow (estimated)

Direct Precipitation (42"/year)	94 million gallons/day
Tributary Total	450 million gallons/day
TOTAL	544 MILLION GALLONS/DAY

Water Outflow (estimated)

Evaporation (22"/year)	49 million gallons/day
Presumscot River	425 million gallons/day
Portland Water District	24 million gallons/day
TOTAL	498 MILLION GALLONS/DAY

TOTAL

Lake Level

Ranges from 260.5 feet to 266.6 feet above sea level, depending on snow melt, rainfall and the opening and closing of dams.

Sebago Lake Watershed Facts

Sebago Lake Watershed Area (excluding water bodies)

Direct Watershed	171 square miles
Indirect Watershed	190 square miles
TOTAL WATERSHED	361 SQUARE MILES

Water Bodies

Sebago Lake	47 square miles
Other lakes, ponds, rivers	28 square miles
TOTAL	75 SQUARE MILES

Land Uses Within the Watershed
(source: digitized aerial photos, May 1990)

Residential	6.9%
Agriculture	2.2%
Commercial/Retail	0.2%
Timber Operations	2.5%
Undeveloped vegetated areas (forests/fallow fields)	86.0%
Other Uses	2.2%