Looking Over Sebago Lake

Lake Facts

Lake 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 307 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) 81.5%
Other Uses 2.2%