Fishery Harbor - Double Lock
A bottleneck vanishes - New lock for bigger ships.
The past showed that the Double Lock, which was built 1921 to 1925, had increasingly become a bottleneck for ships sailing to the Fishery Harbor. Therefore, in June 1996 the Senate of the Free Hanseatic City of Bremen decided to build a new, much bigger main chamber.
After a construction period of four years the big chamber, elongated from 100 to 181 meters, was opened in June 2001. The first ship to pass the new lock was the trawler "Jan Maria" with a lenght of 124 meters. The small chamber kept its width but was correspondingly lengthened.
Through the extension of the Fishery Harbor Double Lock a bottleneck has been resolved. The building secures the access to a 600 hectares maritime area for commercial and industrial use with several hundred companies and several thousand jobs.
|Weight classification||60 / 30||60 / 30|
|Road width||6 m||6 m|
|Sidewalk width||2 m / 1,5 m||2 m / 1,5 m|
|Upper edge of road||7,2 m MSL (9,75 m CD)||7,2 m MSL (9,75 m CD)|
|Upper edge of sidewalk||7,4 m NN (9,95 m CD)||7,4 m NN (9,95 m CD)|
|Weight of the deck||-||55 t|
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- Heights referring to mean sea level (MSL) = +2,55 chart datum (CD)
- Big chamber: Built 2000
- Small chamber: Built 1925
- Small chamber (without fenders): 106 x 12 m
- Width of passage: 12 m
- Upper edge of jamb wall: -8,32 m MSL (-5,77 m CD)
Small chamber gate:
- Length: 12,70 m
- Width: 3,30 m
- Upper edge of sidewalk: 6,3 m MSL (8,85 m CD)
- Upper edge FP wall: 7,2 m MSL (9,75 m CD)
- Weight of lock gate: 100 t
- Operating weight of gate: 32 t
- Big chamber (without fenders): 181 x 35 m
- Width of passage: 35 m
- Upper edge of jamb wall: -10,5 m MCDSL (-7,95 m )
Big chamber gate:
- Length: 37,18 m - Width: 10,08 m
- Upper edge of road: 7,2 m MSL (9,75 m CD)
- Upper edge of sidewalk: 7,4 m MSL (9,95 m CD)
- Upper edge swim box: -6,04 m MSL (-3,49 m CD)
- Lower edge swim box: -9,54 m MSL (-6,99 m CD)
- Width of road: 6 m
- Width of sidewalk: 2 m / 1,5 m
- Weight of lock gate: 1027 t
- Operating weight of gate: 81 t / max. 531 t
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