Egglfing-Obernberg Hydropower Plant

Egglfing-Obernberg Hydropower Plant (German: Kraftwerk Egglfing-Obernberg) is a run-of-the-river hydroelectric power plant on the Inn, where the river forms the border between Germany and Austria. The municipality of Egglfing, Bavaria is located on the left side of the Inn and the municipality of Obernberg, Upper Austria on the right side.

Egglfing-Obernberg Hydropower Plant
Location of Egglfing-Obernberg Hydropower Plant in Austria
Official nameKraftwerk Egglfing-Obernberg
LocationBavaria, Germany and Upper Austria, Austria
Coordinates48.318535°N 13.319979°E / 48.318535; 13.319979
PurposePower
StatusOperational
Construction began1941
Opening date1944
Owner(s)Verbund
Operator(s)Verbund
Dam and spillways
Type of damConcrete gravity dam
ImpoundsInn
Elevation at crest329 m (1,079 ft)
Reservoir
Maximum length12.7 km (7.9 mi)
Normal elevation325.90 m (1,069.2 ft)
Operator(s)Verbund
Commission date1944
Hydraulic head10.5 m (34 ft)
Turbines6 Kaplan-type
Installed capacity84 MW
Annual generation485 mio. Kwh
Website
https://web.archive.org/web/20160306234132/http://www.verbund.com/pp/en/run-of-river-power-plant/egglfing-obernberg

History

In order to supply an aluminium smelter near Braunau with power, two hydropower plants were to be constructed on the Inn: Ering-Frauenstein and Egglfing-Obernberg. Work on the Ering-Frauenstein plant began in February 1939. In January 1943 all 3 machines were operational.[1]

Work on the Egglfing-Obernberg hydropower plant began in July 1941. The first turbine went on line in October 1944, the second in January 1946. The 6th machine went on line in September 1950. Last construction works were finished in July 1951.[2]

Dam

The dam is a concrete gravity dam. The powerhouse with the 6 generators is on the left side of the Inn. The spillway is on the right side and has five gates, each with a length of 23 m. Upstream of the powerhouse the dam features an additional concrete wall as a protection against bombs.[2]

Reservoir

At full reservoir level of 325.90 m the reservoir of the dam has a length of 12.7 km. On both sides of the reservoir are embankment dams.[2] The reservoir is part of the Ramsar site Unterer Inn.[3]

Power plant

The power plant has a nameplate capacity of 84 MW and contains 6 Kaplan turbine-generators. The annual generation is about 485 mio. kwh.[4] The turbines were supplied by Escher-Wyss and the generators by Siemens. Beginning in 1983 the original turbines with 4 blades were replaced with turbines with 5 blades. The average hydraulic head is 10.5 m.[2]

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See also
  • "Kraftwerk Egglfing-Obernberg" (in German). Wikimapia. Retrieved 2016-01-12.

References
  1. "Laufkraftwerk Ering-Frauenstein" (in German). Verbund. Retrieved 2016-03-01.
  2. "Laufkraftwerk Egglfing-Obernberg" (in German). Verbund. Retrieved 2016-03-12.
  3. "The Europareservat Unterer Inn". Bayerisch-Oberösterreichisches Infozentrum Europareservat Unterer Inn. Retrieved 2016-03-01.
  4. "Egglfing-Obernberg Run-of-River Power Plant". Verbund. Archived from the original on 2016-03-06. Retrieved 2016-03-12.
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