Vermuntsee

Vermuntsee
The Vermuntsee; in the background the dam
Geographical location	Vorarlberg
Tributaries	Ill , Kromerbach
Drain	Ill
Places on the shore	Partenen
Data
Coordinates	46 ° 56 '12 "  N , 10 ° 3' 27"  E Coordinates: 46 ° 56 '12 "  N , 10 ° 3' 27"  E
Altitude above sea level	1743  m above sea level A.
surface	35 ha
volume	5,300,000 m³
Catchment area	8 km²

Power plant group Obere Ill-Lünersee Schematic representation

Transfer from the Brandner Glacier 2480  m above sea level A. Ill origin ( Ochsentaler Glacier ) 2460  m Tributaries Silvretta reservoir 2030  m Drain to Ill  |  Lünersee 1970  m Tributaries Kleinvermunt pumping station 1670  m Stream crossing Fasulbach and Rosanna Kops reservoir 1809  m Obervermuntwerk I 1743  m Transfer Kops-Vermunt with tributaries Tributaries Vermuntsee 1743  m Lockroom salonies 1690  m Obervermuntwerk II 1655  m Rells-, Vilifau- and Zaluandabach tributaries Storage basin rells 1456  m Rellswerk 1430  m Kopswerk II   |   Kopswerk  I   |   Vermuntwerk 1025  m Partenen compensation pool 1025  m Free-flow tunnel Partenen-Latschau Rifawerk 1005  m Rifa compensation pool 1007  m Tributaries Garnera, Vermilbach, Suggadin Lünerseewerk 992  m Latschau reservoir 992  m Latschauwerk 985  m Rodundwerk I   |   Rodundwerk II 645  m Inflow from Ill Rodund basin  I to III 645  m Drain to Ill Alvier tributary Inflow quantity Walgauwerk 492  m Walgau compensation basin 492  m Drain to Ill

The Vermuntsee is located at the end of the Montafon valley , in the Austrian state of Vorarlberg , at an altitude of 1743  m above sea level. A. It is bounded in the south by the glaciated Litzner - Seehorn group, in the east by the mountain range of the Kresperspitze and in the west by the Hochmaderer . The Silvretta High Alpine Road runs along the eastern side of the lake . The stored water is used in the Vermuntwerk and as an underwater basin for the Obervermuntwerk II of illwerke vkw AG, which was completed in 2019 .

Supply lines

Part of the water in the Vermuntsee comes from natural tributaries, mainly from the Ill , the Kromerbach and the Bieltalbach, which flows in Tyrol and whose water is fed to the Silvrettasee. But there are also stream crossings from the Vallüla, Valzifenz , Vergaldner and Garneratal valleys. The lake also absorbs the processed water from Obervermuntwerke I and II , which comes from the Silvretta reservoir , which serves as an annual reservoir . The Vermuntsee, on the other hand, serves as a weekly storage facility.

Building history

In June 1925, the preparatory work for the construction of the Vermunt works and its facilities began in Partenen . Until then, the small town with 150 inhabitants had neither electricity nor a telephone nor a modern water supply. Up to 1,800 engineers and construction workers were employed to lay out transport routes for material, equipment and machines, to set up various climbing aids to Vermunt, to build the narrow-gauge railway from Tschagguns to Partenen and to build the power station itself with the Vermuntsperre. At the end of the high valley of the Swiss Vermunt, the 50 meter high barrier was built as a gravity dam between 1928 and 1931 .

The technical execution of the Vermunt dam was carried out in the years up to 1931 as the result of extensive concrete technological test series, whereby earth-moist concrete compacted with compressed air rammers was used instead of the cast concrete technology that had prevailed until then .

Installation

The operation started in 1930, the first full damming took place in 1931. The Vermuntsee has a net volume of 5.3 million cubic meters and an energy content of 15.13 million kilowatt hours (kWh).

"The Vermunt storage facility, with its bypass lines (Vallüla, Vergalden, Valzifenz, Garnera) and a natural catchment area of ​​22.0 km², has a natural inflow of 91.2 million m ³ / year."

conservation

After almost 60 years of operation, extensive maintenance work was carried out between 1987 and 1989. The water-side barrier base was injected and a thick pre-concrete was applied to the cleaned wall surface.

Today the lake and its facilities are part of the illwerke vkw AG network .

Web links

Commons : Vermuntsee  - Collection of images, videos and audio files

• Vermuntsee - illwerkevkw.at

Individual evidence

1. ↑ Quoted from: OBERVERMUNTWERK II, UVP procedure .