Ann Lake is an other dam located in Kanabec County, Minnesota, built in 1966. It carries a Low hazard potential classification and has a satisfactory condition assessment.

Hazard potentialLowFailure would cause limited damage
ConditionSatisfactoryBest of 4 ratings
Emergency action planNot reported
Last inspection10/20/2016
Height25 ft
Built196660 years ago

Dam profile

NID height · 25 ft
25 FT TWO-STORY HOUSEMEDIAN U.S. DAM · 24 FT

25 ft tall and 135 ft long, taller than 50% of U.S. dams with a recorded height. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic embankment section and the water level is illustrative.

About Ann Lake

The primary purpose of Ann Lake is fish and wildlife pond. The dam creates habitat for fish and wildlife, supporting local ecosystems and potentially serving conservation goals. The dam is owned by Mndnr-wildlife (state). It impounds the Ann River near Mora.

The dam stands 25 feet tall and stretches 135 feet across, creates a reservoir covering 363 acres, has a maximum storage capacity of 3,670 acre-feet, and collects water from a drainage area of 56 square miles. Completed in 1966, the structure is well into its service life at over 50 years old.

This dam has a low hazard potential classification, meaning that failure would cause minimal damage, limited primarily to the dam owner's property, with no expected loss of life. Its condition is rated satisfactory, indicating no existing or potential dam safety deficiencies are recognized. The most recent inspection on record was 10/20/2016.

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Location

StateMinnesota
CountyKanabec
Nearest CityMora
River/StreamAnn River
Coordinates45.92263, -93.37045

Physical Characteristics

Dam TypeOther
NID Height25 ft
Dam Height15 ft
Dam Length135 ft
Year Completed1966 (60 years old)

Storage & Hydraulics

NID Storage3,670 acre-ft
Max Storage3,670 acre-ft
Normal Storage3,269 acre-ft
Surface Area363 acres
Drainage Area56 sq mi
Max Discharge250 cfs
Spillway TypeUncontrolled

Ownership & Safety

PurposeFish and Wildlife Pond
OwnerMndnr-wildlife
Owner TypeState
Hazard ClassificationLow
Condition AssessmentSatisfactory
Last Inspection10/20/2016
Emergency Action PlanNot Required

Identifiers

NID IDMN00401
Federal IDMN00401
More InfoState Dam Safety Program