Investigation of regulated tidal exchange and water level control structures for management of saline lagoons at North Killingholme Haven Pits Site of Special Scientific Interest, North East Lincolnshire
Natural EnglandEstimated Value
Up to £5,600
Deadline
13 August 2025
Published
28 July 2025
Type
Not specified
Overview
North Killingholme Haven Pits SSSI is near Immingham, North East Lincolnshire, on the south bank of the Humber Estuary (central grid reference TA1662919816). The privately owned,16ha, site comprises former clay pits which have developed into saline lagoons.
It is within the Humber Estuary Special Protection Area/Ramsar site and is of international importance for non-breeding waterfowl. The site is connected to the Humber Estuary by a manually operated sluice in the flood bank, which allows for the regulated exchange of tidal water.
The sluice is over 50 years old and is not fully functioning due to siltation, and health and safety concerns regarding its operation. The aims of the investigation are to survey the existing water level control structures on site, and appraise the options for management of water levels to achieve the site objectives.
Submission
Contract to start 1 September 2025, with final report to be submitted by 1 March 2026.
Additional details
Outputs include a levels survey, concept designs and estimated costs for each option and associated actions. Site surveys are required.
Technical and practical expertise is required. This is difficult terrain due to tidal mudflats and open water.
There is also a working railway line. A site-based risk assessment will be required to be submitted to Natural England.
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Likely incumbents
Suppliers who won similar work from this buyer in the last 5 years.
- 1
AXION SOLUTIONS LTD
£107,041
total awarded
- 2
ABPmer
4 contracts wonlatest 25 Aug 2026£268,235
total awarded
- 3
Game and Wildlife Conservation Trust
3 contracts wonlatest 8 Oct 2026ends 15 Jan 2027£35,912
total awarded
- 4
UK Centre for Ecology & Hydrology
3 contracts wonlatest 16 Sept 2026£174,491
total awarded
- 5
JAMES HUTTON LIMITED
£88,943
total awarded
AXION SOLUTIONS LTD is the most likely incumbent based on recency and category match. To win, bidders typically need a clearly differentiated proposition or a price advantage.
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Buyer Profile
Natural EnglandKey Dates
Published
28 July 2025
Submission deadline
13 August 2025
Notice type
tenderUpdate
Source
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