Improvement of the Broekermeerdijk embankment

What's going to happen? 

HHNK ensures safe dikes in the management area between the North Sea Canal and Texel. We regularly check whether the dikes are still safe. Due to more extreme weather conditions, the checks and requirements for this have been tightened. The assessment showed that the Broekermeerdijk (and Kanaaldijk from the N235 viaduct) did not meet the requirements for height and strength. Therefore, it must be reinforced.

Where is the project taking place? 

This concerns the Broekermeerdijk (and Kanaaldijk from the N235 viaduct) in the municipality of Waterland.

When will the project take place and how long will it last?

Last year, an initial design was presented to residents who will be affected by the dike reinforcement, among others. However, the groundwater level turned out to be different from the standard water level used in the calculations. In the fall of 2023, we installed monitoring wells at various locations to monitor the groundwater levels in the dike. We measured the groundwater levels for a year to gain insight into the fluctuations in the groundwater. Additional soil research was also carried out to gain an even better understanding of the structure of the subsoil of the dike. The results of both studies were used to recalculate the stability of the Broekermeerdijk. The results of the additional research are favorable for stability. During a very wet period (between the fall of 2023 and the first quarter of 2024), the measured groundwater levels were lower than those used in the original assessment. A lower groundwater level is favorable for the (inward) stability of the dike (in a situation with heavy rainfall and relatively high water levels). After performing a new calculation, it appears that the (inward) stability of the dike is sufficient at most locations. The owners of the plots concerned have now been personally informed. The locations where there is still an (inward) stability issue are outlined below: 

At these locations, all owned by HHNK, a layer of soil (clay or dried dredged material) will be applied to the existing sub-base on the polder side. This work is expected to take place in the fall of 2026. We will do everything we can to minimize disruption, although we cannot prevent trucks from driving around during the work. You can read about the exact timing of the work on this page in due course.

Who do we work with?

HHNK is the client for the dike improvement. The municipality of Waterland is involved in the work. The province of North Holland owns the sheet piling along the reservoir and has replaced the section between Het Schouw and the Drievaart this year. If you live or have your business located along this route, you will have been informed about this by the province of North Holland.

Want to know more?

Do you have any questions or need more information about this dike reinforcement project? Please feel free to contact us. The environmental manager Carola Beers can be reached for this project via ourcontact formand by telephone (via our Customer Contact centre working days at 072 582 8282).

Han Hoonakkers is the contact person for the Municipality of Waterland. You can reach him by telephone on the general number 0299 65 8585.

Ans Romijn-van den Burg is the contact person for the Province of North Holland. She can be reached on the general number +31 (0)23 514 3143.