Asset Management

Lymington Ties Flap Renewal to a Changing-Tide Handover Test

Published 3 November 2026 Publisher IMWO Region Europe Confidence Confirmed
Renewed flaps and a separate valve repair. Lymington / owner completion account, 7 October 2026.

IMWO original engineering diagram; source: Environment Agency

Lymington's replacement tidal flaps were installed in September. The redacted works contract requires a low-to-high-tide function inspection for completion, while the owner's October account identifies a separate regulating-float repair still to follow.

Two flaps replaced during September low tides

The Environment Agency reported on 7 October that new high-density polyethylene and marine-grade stainless-steel flaps had been installed at Toll Road during September low tides. Its account also records flood-gate seal and road-surface repairs. Leaking floats affected the regulating valve, which was temporarily closed pending replacement floats [1]. The July redacted NEC4 short contract identifies Jackson Civil Engineering, two replacement flaps and a road flood-gate sill repair. Its price list totals GBP 113,507.68; contract data give a 31 December 2026 completion date [3,4].

Handover depends on the tidal operating cycle

Scope clause 1.14.2 requires an inspection during a changing tide, from low to high, to establish correct function of all gates. Updated drawings and material specifications also form part of the completion requirements [4]. That makes the inspection window a planned construction activity. A team finishing the lift at low water still needs access, observers and a safe arrangement for the subsequent tidal transition. The outstanding regulating-float repair has its own operating consequence: the Agency expects lower marsh water levels while the valve remains closed [1].

Evidence conclusion

The payment application follows the priced work

Contract data set assessment on the last working day of each month and nil retention. Clause 1.15.1 requires a FastDraft application broken down against the price list, including implemented compensation events [4]. The list separately prices installation, sill repair, mobilisation, temporary-works assistance and traffic permits. For an asset owner, pairing those applications with the changing-tide inspection record links the physical handover to the work being valued. The announced installation and planned float repair can then be managed against their specific functions and scope.

Outstanding evidence

  • Changing-tide function inspection and updated handover drawings
  • Regulating-float replacement and return to normal marsh-level control
  • Price-list applications and implemented compensation events

Related records 1

Subject index

Related subjects

These subject pages bring together related projects, technical articles, reports, and evidence methods.

Sources used 4

Source collections