Author Archives: Thames Menteth

GHD to lead design on £325M Havant Thicket reservoir

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GHD has been appointed as one of the lead designers for Portsmouth Water’s Havant Thicket Reservoir project in Hampshire – the first major new UK reservoir in more than 30 years.

First reported by NCE sister title Ground Engineering, the £325M Havant Thicket Reservoir will be designed to provide storage for…

Consortium named to deliver £671M tunnel for Washington DC sewer

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A joint venture of CBNA and Halmar has been awarded a $819M (£671M) contract to design and build a major new sewer tunnel in Washington DC, USA.

As reported by NCE sister title Ground Engineering, the 8.9km long Potomac River Tunnel will control combined sewer overflows (CSOs) into the Potomac River,…

£14.6M extraction of trapped micro-TBM in Toronto begins

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After 18 months of setbacks crews have finally freed part of a micro tunnel boring machine (TBM) that became trapped in underground infrastructure while constructing a storm sewer in Toronto, Canada.

NCE sister title Ground Engineering reports that last Friday (22 September) the head section of the micro-TBM was successfully extracted…

Trio of drainage tunnels completed on Transpennine Route Upgrade

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The TRU East Alliance, working together with Active Tunnelling, has completed three new drainage tunnels beneath the railway line at Ulleskelf Mires in North Yorkshire.

NCE sister title Ground Engineering reports that, as part of the work, three tunnel boring machines (TBMs) worked simultaneously side by side beneath the four track…

Cost to save trapped micro-TBM in Toronto hits £14.6M

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The cost to free a micro tunnel boring machine (TBM) that became trapped last year while constructing a storm sewer in Toronto, Canada, has risen to C$25M (£14.6M) due to ground stabilisation challenges.

As first reported by NCE sister title Ground Engineering, the rescue mission has become increasingly expensive since February…

Specialist highlights Stonehenge Tunnel ‘sinkhole’ concerns

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Risk of ground collapses above the planned A303 Stonehenge Tunnel have been raised following formation of a “sinkhole” above High Speed 2’s (HS2's) Chiltern tunnels in May.

Hydrogeological specialist George Reeves is part of campaign group the Stonehenge Alliance, which opposes National Highways' £1.7bn A303 Amesbury to Berwick Down scheme past…