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Contest #299 answer: Naviduct Krabbersgat, Enkhuizen, The Netherlands
There are lots of navigable Aquaducts in the world, but this one is rather unique as it is combined with a double ship-lock. Hence the different name. It is part of the Houtribdijk, the dam that divides the IJsselmeer into two parts.
It was created in the 1990’s because the traditional lock and bridge combination caused too much delay for both road traffic as well as for the ships.
Construction was rather unique: first a small polder was created at 11 meters below sea level for the road with an irrigation system to keep it dry. Next the ‘lock bridge’ was constructed out of 7 elements with watertight seals and connected to the waterways.
Right answers this week from:
Felix Bossert
Walter_V_R
VSWG
mccrumplair
hhgygy
Farceur
Paul Voestermans
rob de wolff
Wista
Eloy
Fred A
krenek
Cloudspotter
Phil Ower
Sandworm
Chris Nason
Tim (UK)
mehmet durmus
Noisette
Stephen M
– Hint –
Ole Tjugen