The slipway on the Isle of Iona provides the principal point of access to the island for the ferry from Fionnphort on Mull, for both the local community and the very many tourists who visit. The concrete at the seaward end had deteriorated and full reinforced concrete reconstruction was required over the lower 20m section across the full width of the slipway.
The contract was awarded on an alternative Contractor-designed proposal which offered considerable saving to the client. This involved the off-site pre-casting of thirty six large 6.5m x 1.25m units to enable effective use of the spring low tides. The on-site process was programmed in three phases of extended 24hr working in 6-hour low tide windows to break out the existing slipway, prepare the formation & place the new pre-cast units and finally pump site-batched concrete to fill the voids below.
A key consideration was maintaining the essential ferry connection to the island throughout the duration of the works and through extensive consultation and cooperation with both the local community and with ferry operator CalMac, continuous passenger ferry operation were maintained, with the car ferry service accommodated twice on a daily basis at high tides.
Precasting was undertaken under controlled conditions in GL’s yard in Glasgow and an on-site Utranazz volumetric mixer used for the in-situ concrete.
On completion of the work, the Iona Community Council secretary wrote: “The community … would like to express their thanks to the George Leslie team for their professionalism and commient…the work area was kept very tidy and the pier itself was spotless when in public use”
The overall project involves the off-site fabrication and installation of a new linkspan structure at Oban Ferry Terminal for client Caledonian Maritime Assets Ltd (CMal).
12th February 2019
GL making a return visit to the Sound of Kerrera off Oban, to undertake substantial repairs to the breakwater which suffered collision damage following an altercation with a workboat earlier this year.
14th December 2018
Michael Matheson MSP and Cabinet Secretary for Transport, Infrastructure and Connectivity covered all his portfolios at the official opening of the new Polmadie Footbridge giving pedestrian and cycle transport access,
18th September 2018