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Portumna Bridge Replacement

Projects > Design Build

PORTUMNA BRIDGE
REPLACEMENT,

Portumna, Co. Galway.		 This project involves the replacement of the vehicular crossing of
the navigation span of the River Shannon provided by the
existing Portumna opening swing bridge.

The new welded steel bridge structure was delivered to site in
sections and assembled on site; it was lifted in using a 500t
mobile crane. Some elements of the existing bridge were
removed, refurbished and reinstalled; these included the rack,
stabilising and slewing wheels. The refurbishment involved shot
blasting, non destructive testing, repair and painting.

The existing bridge hydraulic, mechanical and electrical systems
were removed and disposed of. Due to the environmentally
sensitive nature of the River Shannon the disposal of these
components was carefully planned to avoid any contamination of
the water course and its environs. A new plant room was
constructed to house all the replacement components.

All of the on-site work was carried out over or adjacent to water.
These included the demolition of the existing steel bridge
structure, installation of the new structure, abutment repair,
bearing installation, electrical installation, submarine duct
placement on river bed and fender installation.

The replacement was completed during a 9-day road closure of
the N65 at Portumna, the road was re-opened ahead of
schedule. The road closure was planned and agreed 10 months
ahead of the proposed closure date with the involvement of
three Local Authorities and the NRA. A diversion was put in
place for the closure; a traffic management plan was
implemented according to Chapter 8 of the Traffic Signs Manual.
Client Waterways Ireland.
2 Sligo Road,
Enniskillen,
Co. Fermanagh
Engineer Royal Haskoning,
10 Bernard Street,
Leith,
Edinburgh, EH6 6PP.
Value €2.2m
Programme 6 months
Date of Completion December, 2008.


Portumna Bridge Refurbishment.
Click here for details.

L&M Keating Ltd, Kilmihil, Co. Clare. www.lmkeating.ie | info@lmkeating.ie
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