Trollhatte canal 2009 Trollhätte canal, located in the Southwest part of Sweden, has a difference in altitude of 44 meters, handled by six locks. One single lockage demands 8000-12000 m3 of water. In May 2009, the lock system was closed down for maintenance and repair; this required four of the locks to be drained and kept dry for four days. Grindex pumps in the sizes Matador and Maxi were rented for the task. During 14 hours, a total of over 37 millions of litres of water were drained away. A 200-year-old canal with 44 m of difference in altitude Trollhätte canal was opened for traffic for the first time back in the year 1800. This allowed sailing ships to pass through the river Göta älv all the way from Gothenburg up to Lake Vänern. The river has been widened several times since the op

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