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28 January 2009

Mott MacDonald to provide detailed design for Thames waste jetty

Mott MacDonald has been appointed by Costain to design the associated marine works for a new waste-to-energy power station in East London.

Mott MacDonald’s role involves the detailed design of the jetty, which will service the new power station situated at Belvedere at Halfway Reach on the Thames. The 270m long jetty will be used to transfer containerised waste from 60ft river barges to the power station and containerised ash onto the barges for disposal, while simultaneously providing a habitat for local wildlife.

Richard Stephens, Mott MacDonald’s project manager, explained, “The design complies with stringent planning constraints and includes environmental protection and wildlife enhancement features to promote weed growth on the structure, as well as perches for water birds. With berthing on both faces for a total of eight 60ft barges, the jetty’s design accommodates for up to 260 full waste containers per day, with the same number of waste containers being returned.”

He added, “Mott MacDonald’s design for the piling was enhanced by an innovative use of strain gauges during pile testing to measure mobilised skin friction. Results obtained from these gauges enabled us to reduce the pile lengths required, offering a cost saving to the client.”

Construction is expected to be complete by the middle of 2009 and Mott MacDonald will continue to provide technical support during construction. The ultimate client is Riverside Resource Recovery Limited, a subsidiary of Cory Waste Management, with VonRollInova appointed to project manage the construction of the power station and jetty.


Additional technical information

- The jetty will be connected to the shore by a 140 m long two-lane approach structure and will support two double-sided gantry cranes that will lift 25 tonne waste containers and span two traffic lanes on the jetty deck.

- The jetty will be founded on vertical and raking tubular steel piles supporting a reinforced concrete deck. Steel frames will be placed over the driven piles to provide stiffness to the structure and support the articulated fender system. A modular system of pre-cast concrete beams span between the frames, which will temporarily support a crawler crane during the construction.

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