Arnisee

 Map with all coordinates: OSM | WikiMap

Arnisee
Arnisee in the canton of Uri, in the background the Windgallen
Geographical location	on terrace above Amsteg Uri Switzerland
Tributaries	Intschialpbach and Leutschachbach supply line
Drain	Arniseebach
Location close to the shore	Intschi and Amsteg (access to the lake with cable cars )
Data
Coordinates	691990  /  180791
Altitude above sea level	1368  m above sea level M.
surface	5.3 ha
length	250 m
width	200 m
Maximum depth	10.5 m

Arniboden south
Coordinates	691960  /  180620
Data on the structure
Lock type:	Earthfill dam
Construction time:	Completed in 1910
Height of the barrier structure :	15 m
Building volume:	40 000  m³
Crown length:	74 m
Power plant output:	13 MW
Operator:	Electricity works Altdorf AG

Arniboden East
Coordinates	692150  /  180840
Data on the structure
Lock type:	Earthfill dam
Height of the barrier structure :	12 m
Crown length:	67 m
with inlet structure and water lock

Arniboden North
Coordinates	691980  /  180949
Data on the structure
Lock type:	Earthfill dam
Height of the barrier structure :	2 m
Crown length:	60 m

Arniboden West
Coordinates	691891  /  180759
Data on the structure
Lock type:	Earthfill dam
Height of the barrier structure :	4 m
Crown length:	80 m

The Arnisee (also called Arniseeli ) is located on the Arnialp in the heart of Switzerland in the canton of Uri at 1368  m above sea level. M. on the ground of the municipality of Gurtnellen . The lake with a diameter of 200 to 250 m is an excursion destination for day tourists and a starting point for high alpinists in the Uri Alps .

technology

The Arnisee contains the dammed water of the Leitschachbach and the Intschialp Bach, which is fed to the lake via an approximately 2.4 km long cement pipeline. This serves as weekly storage for the Arniberg power plant owned by Elektrizitätswerk Altdorf AG (EWA). The water drives with a drop height of 851 meters, the turbines in the power house at Amsteg in which an output of 13 megawatts have. The underwater flows into the Reuss . When the power station opened in 1910, it was the facility with the highest drop in the world.

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  Construction of the cement pipeline for the supply line of the Intschialpbach into the Arnisee (approx. 1910)

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  Arnisee shortly after the start of the damming, view towards Ostdamm

The lake's four dams were built in 1910. On the east side there is the 12 m high dam with the inlet of the pressure line of the power plant, there is also a larger 15 m high dam on the south side. Both earth embankments have a concrete core and are plastered with cement on the water side . The dam on the north side is only two meters high, on the west side there is a four-meter high dam.

The construction of the dams turned out to be difficult because the plateau where the Arnisee is located was very difficult to access. Therefore a temporary funicular had to be built first with a gradient of 1100 ‰. It was used to transport the building material to the Arniberg, including the material for the definitive factory funicular , a stone crusher and a dismantled steam locomotive for the construction railway . The construction of the dams only began after the supply line, the pressure line and the power plant's machine house had been completed. Until the lake could be dammed up, the water was fed directly to the pressure pipeline from the lake's supply pipe with a wooden channel.

The later works funicular ran along the pressure line of the power plant. It was designed as a winch run with two sections, the lower section being 1152 m long and the upper section 950 m long. The track width of the train was 75 cm. At the intermediate station in Unteraxeli, the wagons were detached from the rope of the lower section and pushed by hand to the valley station of the second section. Different cars were available depending on the task. The plant was shut down in 2007.

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  Construction of the concrete core of the Ostdamm, in the foreground the only locomotive on the construction line

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  Wooden channel over the Arniboden during the construction phase

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  Pressure pipeline of the power plant as seen from Unteraxeli. The upper section of the works cable car begins at the left end of the bridge visible in the foreground

reachability

The Arnisee can be reached with two different cable cars. A four-person cabin drives from the valley station at the Amsteg motorway exit to Vorderarni. From here you can reach the Arnisee in a twenty-minute walk. Coming from Intschi you can reach the Arnisee with the Intschi-Arnisee cable car . The train has two aft cabins. It was rebuilt from mid-February to the end of May 2018. The Intschi valley station can be reached by car or the Auto AG Uri bus . The SBB Intschi train station is no longer in operation. The Arnisee can be reached on foot in three minutes from the mountain station. There is an overnight stay right by the lake.

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  One of the two cabins on the Amsteg – Mittel Arni cable car

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  Partly frozen Lake Arnisee in winter (2019)

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  Chapel in forest at Arnisee
  Location: 692 094  /  180,916

Excursion destinations

After a five-minute walk from the mountain station of the Intschi-Arnisee cable car , you reach the Chänzeli . The Chänzeli is a vantage point on a rocky promontory that gives you a view of the Urner Oberland, the Maderaner Valley and the Bristen . There is an open-air chapel in the forest adjacent to the lake. After a twenty-minute walk from the mountain station, you reach the Vorder-Arni viewpoint . From here you can see over the Reuss valley and as far as Lake Uri .

The Arnisee is the starting point for various longer hiking tours. A hike down the valley to Gurtnellen takes about two hours. The Sunniggrathütte can be reached in around two hours from the Arnisee and the Leutschachhütte in around three hours.

Web links

Commons : Arnisee  - collection of images, videos and audio files

• Amsteg – Arnisee aerial cableway. official page. 
• Intschi-Arnisee cable car. official page. 

Individual evidence

1. ↑ ^{a b} SwissTopo (maps of Switzerland)
2. ↑ Arnisee on the map of the Federal Office for Topography
3. ↑ The Arnisee. Retrieved September 18, 2017 . 
4. ↑ EWA is subjecting pioneer power plant to a makeover . In: Zek Hydro . Volume 10, December 2012, p. 37-39 ( docplayer.org ).
5. ^ Electricity works Altdorf AG, EWA. Retrieved September 18, 2017 . 
6. ↑ ^{a b} The Arniberg hydropower plant. P. 7 , accessed on September 18, 2017 . 
7. ↑ Swiss coordinates 693826  /  one hundred and eighty thousand five hundred and sixty
8. ^ The power plants of the EWA. P. 5 , accessed on September 18, 2017 . 
9. ↑ Federal Office for Energy (Ed.): Map of dams and federal supervision . December 27, 2018 ( admin.ch ).
10. ↑ ^{a b} The Arniberg electricity works near Amsteg . Part 1. In: Schweizerische Bauzeitung . Issue 14, October 5, 1912, p. 183-189 , doi : 10.5169 / seals-30060 .
11. ↑ Amsteg Unteraxeli. In: standseilbahnen.ch. Retrieved December 21, 2018 . 
12. ↑ Unteraxeli Arnisee. In: standseilbahnen.ch. Retrieved December 21, 2018 . 
13. ↑ Belt fasteners. Retrieved September 18, 2017 . 
14. ↑ Intschi-Arnisee cable car. Retrieved September 18, 2017 . 
15. ↑ Lucerne newspaper, Central Switzerland, September 12, 2017. Retrieved September 18, 2017 . 
16. ↑ Intschi-Arnisee cable car: The train is running again.Retrieved on June 4, 2018.
17. ↑ Gasthaus Alpenblick. Retrieved September 18, 2017 .