Client: Ballina Town Council

Location: Co. Mayo, Ireland

Project Value: €1.43m

Description: Construction of a 67m long, two span, post tension cable stayed footbridge over the River Moy in Ballina, Co. Mayo

The Ridge Pool is one of Europe’s leading fisheries and an extremely important environmental, economic and tourism resource.

The project involved the following;

  • Demolition of the existing three-story industrial building on the north bank of the River Moy. The building was approximately 12000m2. It involved the removal and disposal of asbestos sheeting and steel cladding.
  • Design and construction of a pier foundation in the River Moy.
  • Construction of a reinforced concrete pier, two reinforced concrete abutments and a hollow steel pylon with concrete filling in the River Moy.
  • Manufacture and erection of a pre-cast concrete bridge deck with stay cables from the deck to the pylon.
  • Construction of bridge parapets, approach stairs and ramp to the south abutment, including parapets and railings.
  • Surfacing to bridge deck and approaches. Installation of elastomeric (type 5) expansion joint system.
  • Diversion of existing services, with construction of gas, electric and telecom service ducts/pipes under the bridge deck.

A rock platform was constructed in the river for the 300T crane used to lift the temporary works into position. This involved placing a rock formation, approx. 22m from one bank and 45m from the other, in the river bed. This platform was then spanned with welded double 914mm RSJ’s. The 45m span also received temporary support. These spans were then decked with a prefabricated platform in order to allow access to the works.

The works were undertaken adjacent to a listed structure – fish pass and weir. Rigorous management controls were required to meet with Fisheries, National Parks and Wildlife, requirements due to the strategic location of the bridge works.