Lower St. Anthony Falls, United States

Lower St. Anthony Falls (LSAF) lock and dam are located on the Mississippi River in the city of Minneapolis, Minnesota. LSAF forms part of the inland waterway navigation system and was built by the government in the 1950s. It consists of a main lock and an uncompleted auxiliary lock.

The 10 MW StrafloMatrix plant was planned by a private development group and is installed in the existing auxiliary lock.

The core element of the plant is a newly constructed retaining wall inside the existing auxiliary lock structure, whose front side houses 8 modules each containing one pair of TG units in a two-row configuration.

Site construction began in the spring of 2009, with completion in late 2010.

Technical Data
Number of modules	8
Number of units per module	2
Total number of units	16
Axes	Horizontal
Head	7.6 m (25 feet)
Runner diameter	1,320 mm (51.9 inches)
Number of blades	4, fixed
Distributor	Fixed blades
Rated speed	327.3 rpm
Type of generator	StrafloMatrix,, permanent magnet synchronous
Voltage	4,160 V
Output per unit	625 kW
Output total	10 MW
Date of commissioning	2011

StrafloMatrix Hydropower plant, view from downstream

Overall view from downstream side before installation of the power plant

Contact

ANDRITZ HYDRO

Hydromatrix product management

Phone: +43 (732) 6986 74261