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Delta Stream Tidal Energy Research Project

LOCATION:

Pembrokeshire
Energy

Energy

Tidal energy has potential to be a major growth area and Wales is intending to lead the way as Pembrokeshire moves closer to establishing a marine renewable energy centre around the Milford Haven waterway.

We carried out all onshore works for the Delta Stream research project.

  • Construction of a temporary power conversion compound.
  • Road and foundation construction.
  • Fencing and conduit/ducting.
  • Electrical works including cabling, shore line jointing connections and communications routing between shore and compound and within the conversion compound.

Challenge

Reopening a 70m section of the dock feeder canal, which was covered by 69 concrete beams that each weighed 7.5 tonnes.

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Solution

Faced with working not only within a confined city centre location but above a Victorian brick egg sewer, we first considered lifting out the sections by either 60T or 90T crane. The 60T proved unable to reach the full extents. The 90T would have required considerable amendments to our site layout. This lead to us deciding to use a 50T excavator, which was the smallest size of machine capable of managing both the capacity and reach required.

We then had to solve how to release the beams, which were locked into position with a keystone. We did this by pecking at the joints and nudging them fractionally towards the keystone, duly releasing the pressure and allowing the beams to be easily lifted out.

Outcome

A 39ft high, 400KW turbine now stands on the site having provided essential learning, new knowledge, knowhow and experience to progress the tidal energy industry in Wales.

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