The Mann Lakes are two close basin lakes in Alberta. Once a single lake named Mann Lake, the construction of Highway 28 in 1961 split the lake in two.^[1] The more southerly Upper Mann Lake lies at 54°08′37″N 111°30′57″W, and just north of it, the more northerly Lower Mann Lake at 54°10′N 111°30′W. Since 1980, their water level has been steadily declining.^[2]

Quick Facts Location, Coordinates ...

Mann Lakes
Mann Lakes
Location	County of St. Paul No. 19, Alberta
Coordinates	54.158°N 111.509°W / 54.158; -111.509
Basin countries	Canada
Max. length	Upper 3.1 km (1.9 mi) Lower 3 km (1.9 mi)
Max. width	Upper 3.3 km (2.1 mi) Lower 3.5 km (2.2 mi)
Surface area	Upper 4.59 km2 (1.77 sq mi) Lower 5.10 km2 (1.97 sq mi)
Average depth	Upper 5.7 m (19 ft) Lower 4.0 m (13.1 ft)
Max. depth	Upper 9.1 m (30 ft) Lower 6.1 m (20 ft)
Surface elevation	Upper 618 m (2,028 ft) Lower 617 m (2,024 ft)
References	Mann Lakes

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• List of lakes in Alberta