KGAL Fluid SUMMER 2026 - Flipbook - Page 4
consulting engineers
Bristol Underfall Sluices
Writing a specification is one thing. Making sure
it’s properly interpreted, engineered, and built is
where successful projects are secured. At the
Bristol Underfall Sluices, that transition is now
underway and being managed through close
collaboration between all parties.
KGAL has worked closely alongside the Bristol Harbour Authority and Bristol City Council
in developing the performance specifications for the refurbishment works, defining
exactly how the upgraded system must operate. These sluices are central to
maintaining water levels and flow within Bristol’s Floating Harbour, and their
performance is central to day to day harbour operations.
Following joint technical support during the tender process, a specialist contractor has
now been appointed to deliver the scheme.
The project has entered the design review phase, and the Contractor submissions are
currently being assessed collaboratively by KGAL’s and the Dock Engineering teams to
confirm full alignment with the specified performance and operational requirements.
As the design progresses, the project is moving from planning into physical intervention
on a structure of significant operational and historic importance. The co-ordinated
involvement of the Harbour Authority, Dock Engineering, Bristol City Council and
KGAL is providing continuity from specification through to delivery, helping to manage
risk and maintain confidence as the site works approach.
Bristol Entrance Lock Surveys
The risks associated with ageing lock infrastructure aren’t always obvious. The real issues often sit
below the waterline, out of sight, quietly dictating performance. At the Bristol Entrance Lock, this has
been a shared challenge requiring coordinated technical input.
KGAL, working closely with Bristol City
Council, the Bristol Harbour Authority
and their Dock Engineering Team, has
recently completed a full set of dive
subcontractor specifications to enable
detailed condition surveys of the lock
gates and associated sluices. The tightly
defined scope is designed to extract
meaningful, usable data, obtained from a
complex and constrained (including
underwater) environment.
Throughout the procurement phase,
KGAL supported Bristol City Council,
working alongside the Harbour Authority
and Dock Engineering colleagues, to
inform technical evaluation and
subcontractor selection.
Entrance Lock View of Inner & Outer Gates
This collaborative approach ensured
technical expectations, operational
priorities and practical delivery solutions
were fully aligned.
With the tender process now complete, the project moves into delivery. Dive operations are nearing completion, covering both entrance lock gates and the
associated sluice structures. The surveys will provide a comprehensive assessment of condition, identifying wear, damage, and any emerging risks that
need to be addressed.
By combining technical expertise, operational knowledge and engineering oversight, the project team is ensuring that future decisions on maintenance, repair,
or replacement are grounded in fact. On complex maritime structures such as this, what lies unseen is usually what matters most.
