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CENTRAL ALLIANCE CONSTRUCT THE FIRST BOREHOLE ON THE ISLE OF BARRA

The existing RNLI station at Castlebay was established in 1931 and is home to both inflatable D-class lifeboats and the 17.3 metre Severn class lifeboat. However, it is now in need of an upgrade. 

Barra along with the rest of the Western Isles, is formed from the oldest rocks in Britain, the Lewisian Gneiss, which dates from the Archaean eon. Castlebay is located on the South coast of the island, and overlooks a bay in the Atlantic Ocean.

Central Alliance were instructed by the RNLI on behalf of Royal Haskoning DHV, to undertake the Ground Investigation. The fieldwork was delivered using a collaborative approach with RSK over two separate phases with a hiatus of two weeks between each phase. 

The Ground Investigation managed by Project Manager Ben Swallow, comprised a geophysical survey, the drilling of exploratory holes (Rotary Coring) hand-dug inspection pits, packer testing, Groundwater Monitoring, Laboratory Testing, and Factual Reporting. The ground data collected will be used to inform the design of the new station moving forward, allowing the project to be completed safely and more efficiently. 

The project has been a major success, gaining interest from Geo Drilling International that have been published in an article on RSK’s involvement in the upgrade, as well as another publication from ‘Project Scotland’ the Scottish Construction news magazine.  

Central Alliance rotary drilling for RNLI Barra in the Outer Hebrides.
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