Lai da Marmorera

from Wikipedia, the free encyclopedia
Lai da Marmorera
Lai da Marmorera - Marmorerasee LBS L1-900569.jpg
Location: Graubünden , Switzerland
Tributaries: Gelgia / Julia , various mountain streams
Drain: Gelgia / Julia
Larger places on the shore: Marmorera
Lai da Marmorera (Canton of Graubünden)
Lai da Marmorera
Coordinates 768 733  /  152187 coordinates: 46 ° 29 '59 "  N , 9 ° 38' 13"  O ; CH1903:  768,733  /  152187
Data on the structure
Lock type: Earthfill dam
Construction time: 1950-1954
Height of the barrier structure : 91 m
Height above the river bed : 65 m
Height of the structure crown: 1684  m above sea level M.
Building volume: 2 700 000  m³
Crown length: 400 m
Crown width: 12 m
Base width: approx. 400 m
Slope slope on the air side : approx. 1: 2
Slope slope on the water side : approx. 1: 2.5
Power plant output: 3 stages:
1st stage:
Tinizong 69 MW
2nd stage:
Tiefencastel Ost 52 MW
3rd stage:
Sils 26 MW
Rothenbrunnen 38 MW
Total: 185 MW
Operator: Electricity company of the city of Zurich
Data on the reservoir
Altitude (at congestion destination ) 1680  m above sea level M.
Water surface 1.41 km²dep1
Reservoir length 2.6 km
Storage space 60 million m³
Total storage space : 62.6 million m³
Catchment area 89 km²
Design flood : 200 m³ / s
Map Lai da Marmorera.png
Detailed map

The Lai da Marmorera is a Swiss artificial lake in the canton of Grisons in the municipality Surses that the Mittelbünden power plants of the power station of the city of Zurich is operated (EWZ). It can be reached from Tiefencastel or from the Engadin from the village of Silvaplana over the Julier Pass . The only village on the lake is Marmorera . Above the western end of the dam are the ruins of Marmels Castle .


Location map and system scheme

The Marmorera Dam (Castiletto) was completed in 1954. The old Marmorera was flooded after the main buildings were blown up. The new Marmorera was built above the reservoir and the Julier Pass road. Many residents preferred to move away for economic and emotional reasons.


The Lai da Marmorera is often visited by divers in summer and autumn, as it offers ideal conditions for mountain lake diving : crystal clear water, remains of the sunken village and an approach that does not lead over any passes from the north. There are two safe and easily accessible dive sites : the first below the “Marmorera Dorf” post bus stop and the second near the Julier Bridge at the southern end of the lake.

See also

Individual evidence

  1. a b c d Lakes in Switzerland: Natural and storage lakes, Federal Office for the Environment FOEN, 2007 ( Memento from October 5, 2008 in the Internet Archive ) → Lakes in Switzerland (PDF)
  2. Claudia and Norbert Eisenlohr, Dive Guide - Tauchplatzführer der Schweiz , 3rd edition, 2005 Claudia and Norbert Eisenlohr, ISBN 3-9521233-1-5


  • Paul J. Mark: A mountain village is going under. Terra Grischuna-Verlag, Chur 2005
  • Andreas Siegfried: Marmorera . ( [PDF]).

Web links

Commons : Lai da Marmorera  - Collection of images, videos and audio files