Engelberger Aa

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Engelberger Aa
Engelberger Aa tobel.jpg
Location
CountrySwitzerland
Physical characteristics
Source 
 ⁃ locationWest of Surenenpass
Mouth 
 ⁃ location
Lake Lucerne
 ⁃ elevation
433 m (1,421 ft)
Length50 km (31 mi)
Basin size230 km2 (89 sq mi)

Engelberger Aa (or Engelbergeraa) is a river in Switzerland. It rises west of Surenenpass in the Canton of Uri, flows through the valley of Engelberg (Obwalden) and Nidwalden. At Buochs, it empties into Lake Lucerne and is thus a tributary of the Reuss, which drains that lake.

Coordinates: 46°58′44″N 8°25′31″E / 46.97889°N 8.42528°E / 46.97889; 8.42528

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