The problem
In November 2023, IWS M&E was tasked with replacing eight sluice doors at an important lock with a strict completion date of 28th March to align with the start of the boating season. After an initial survey, it was confirmed that only two sluice doors were working. Years of wear and tear and lack of maintenance had made the doors inoperable, resulting in boats queuing at either side of the lock during boating season.
The solution
IWS M&E worked with Red7, an in-shore diving team, to complete the work under the waterline. The five-man team recorded measurements of the doors before taking them apart and lifting them out of the water. The doors were then sent to the supplier to check the dimensions and design before new doors were delivered and fitted.
Challenges
This was a high-profile job which was audited closely by the client. The site was close to the location of an annual regatta and a popular space for boating. The team were working to a tight programme as the lock needed to be ready for Easter weekend, with the risk of significant reputational damage and public disruption if not.
There was a considerable level of traffic, both on river and foot, so the work was completed out of boating season which allowed the lock to be closed for the duration. There was a very busy public footpath running through the middle of the site that remained open throughout the project and protecting passers-by was a challenge and a priority. There was a lot of public interest and the team had conversations with people about the work on the lock, as well as marshalling them safely through the site.
With the support of our specialist diving contractor, Red7, the complex and high-risk works were delivered without incident and to a high standard. The particularly wet winter also flooded the river throughout most of the project, threatening to delay completion of the works. Collaborative working with the client and contractors allowed the team to address the logistical and safety challenges that the flood conditions presented.
Result
The project was completed, and a fully operational lock was handed over to the client on 28th March to specification and within the budget.
Working closely with the client and contractors to address the logistical and safety challenges meant that the work was completed in the most efficient way possible, while mitigating the impact of any potential safety risks on site.
