All about the Willem I-sluis: service times, location and contact details. On the water map below do you see this lock complex in its immediate vicinity. On the right on this page you will find the locking times, additional information and the telephone numbers and VHF channels.
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For seasoned water sports enthusiasts it is a simple procedure, but if you are not yet experienced on the water, entering and exiting the lock can be an impressive experience. How does it work, where do you moor, what should you pay attention to?
| Width 5.3 meter | Lock length 50.2 meter |
| Threshold depth (buiten) - meter | Threshold depth (binnen) - meter |
| VHF-Channel 20 | Phone number 020-6360970 |
From 01-01 until 04-01
If you do not hear a request, call 0900 - 9394From 05-01 until 31-03
Sunday: closedFrom 01-04 until 04-05
Working days: between 06:00 and 22:00From 05-05 until 13-05
Working days and Holidays: between 06:00 and 22:00From 14-05 until 31-10
Working days: between 06:00 and 22:00From 01-11 until 14-12
On 24 and 31 December the service ends at 16:00.From 15-12 until 21-12
If you do not hear a request, call 0900 - 9394From 22-12 until 28-12
If you do not hear a request, call 0900 - 9394From 29-12 until 31-12
If you do not hear a request, call 0900 - 9394Administrator visiting address
Houtplein 33 Haarlem
Phone number: 0800-0200600
Data updated: 13 Januari 2026, 09:30 uur
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