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Dayton Hollow Dam facts for kids

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Dayton Hollow Dam
Coordinates 46°13′51″N 96°07′03″W / 46.23083°N 96.11750°W / 46.23083; -96.11750
Purpose Hydro Power
Fish & Wildlife Pond
Status In use
Construction began 1907
Opening date 1909
Owner(s) Otter Tail Power Company
Dam and spillways
Type of dam Gravity dam
Impounds Otter Tail River
Height (foundation) 41 ft (12 m)
Length 256 ft (78 m)
Spillways 1
Spillway type 7 controlled sluice gates
Spillway capacity 2,000 acre⋅ft (2,500 dam3)
Creates Dayton Hollow Reservoir
Total capacity 5,000 acre⋅ft (6,200 dam3)
Catchment area 1,810 sq mi (4,700 km2)
Normal elevation 1,073 ft (327 m)
Power station
Type Conventional
Hydraulic head 36 ft (11 m)
Turbines 3
Installed capacity 1.0 MW
NIDID# MN00196

Dayton Hollow Dam is a hydroelectric gravity dam on the Otter Tail River in Otter Tail County, Minnesota in the United States. It is located 5 miles southwest of the city of Fergus Falls. Completed in 1909, it is the first power plant built by the Otter Tail Power Company and is one of five dams on the river. Together, they produce about 3.5 megawatts of power.

Shortly after becoming operational, Dayton Hollow Dam narrowly avoided destruction. The city-owned Fergus Falls City Light Station, several miles upstream, abruptly failed in the early hours of September 24, 1909. Three other dams between the disaster site and Dayton Hollow were swept away and a fourth (Central / Wright) was badly damaged. Otter Tail Power Company president Vernon Wright received enough advance warning to reach his dam by 6:15 am and open the spillway. The only flood recorded in the history of the river was due to this disaster.

The license for the hydroelectric plant expires on November 30, 2021. In June 2016 the company filed a pre-application with the Federal Energy Regulatory Commission to re-license the station with no changes to existing facilities or operations. The process will take 5 years.

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