Number One Pond, located in Sanford, Maine, is a concrete gravity dam completed in 1912 primarily for flood risk reduction along the Mousam River.
Wind
Humidity
With a structural height of 14 feet and a length of 245 feet, the dam has a maximum storage capacity of 508 acre-feet and a normal storage capacity of 278 acre-feet, covering a surface area of 45 acres and draining an area of 41 square miles. The dam's spillway width is 185 feet, and it has been assessed to have a low hazard potential and fair condition as of the last inspection in October 2011.
Owned by the local government and regulated by the Maine Emergency Management Agency (MEMA), Number One Pond serves multiple purposes including flood risk reduction, recreation, and other uses. The dam has state permitting, inspection, and enforcement in place, ensuring its continued safety and functionality. The emergency action plan (EAP) for the dam was last revised in May 2018, but specific details on its compliance with guidelines and risk management measures are not available. Despite its age, Number One Pond Dam remains a vital infrastructure for water resource management in the area, contributing to the overall resilience of the community against flood events.
Year Completed |
1912 |
Dam Length |
245 |
Dam Height |
14 |
River Or Stream |
Mousam |
Primary Dam Type |
Concrete |
Surface Area |
45 |
Hydraulic Height |
14 |
Drainage Area |
41 |
Nid Storage |
508 |
Structural Height |
14 |
Hazard Potential |
Low |
Nid Height |
14 |
Mousam River Near West Kennebunk
|
44cfs |
Cocheco River Near Rochester
|
24cfs |
Isinglass R At Rochester Neck Rd
|
26cfs |
Oyster River Near Durham
|
2cfs |
Lamprey River Near Newmarket
|
42cfs |
Saco River At Cornish
|
1020cfs |