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.

Naviduct_Krabbersgat

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.

Naviduct_Krabbersgat2

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
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Ole Tjugen