Spoolder lock

The Spoolder lock is a lock with one lock chamber with pointed doors between the IJssel and the Zwolle-IJsselkanaal in the municipality of Zwolle. The largest vessels allowed on this waterway are ships with the dimensions 110 x 12.00 m, CEMT class Va. With permit 139 m.
The lock is 142 m long, 14.0 m wide. Depth lock threshold both on the inside and on the outside is NAP –4.50 m. The top of the lock wall has a height of NAP +5.50 m. The doors in the inner and outer head are identical. There is one set of spare doors at the lock. The doors of the lock are not equipped with a latch mechanism for reversing negative decay. However, drainage on the IJssel does not pose any problems for safety. On the outside, the water level depends on the river discharge and can therefore vary greatly. The movable bridge is a drawbridge and is therefore located over the lock head on the inside of the lock chamber. Clearance height of the bridge in closed position NAP + 4.40, usual is KP +4.8 m. The water level in the canal varies between approximately NAP –0.20 m and -0.40 m.

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