This website uses cookies to store information on your computer. Some of these cookies are used for visitor analysis, others are essential to making our site function properly and improve the user experience. By using this site, you consent to the placement of these cookies. Click Accept to consent and dismiss this message or Deny to leave this website. Read our Privacy Statement for more.
ICRI 2012 Project Award Winner
Share |

Award of Excellence: Transportation Category

Silver Jubilee Bridge Remediation
grey line

Widnes, Cheshire, United Kingdom

Submitted by Mott MacDonald, Ltd.

Silver Jubilee Bridge

Halton Borough Council
Widnes, Cheshire, UK

Project Engineer/

Mott MacDonald, Ltd.
Altrincham, Cheshire, UK

Repair Contractor
Rudheath, Cheshire, UK

Material Supplier/

Protector As
Tranby, Norway

The Silver Jubilee Bridge offers the only river crossing between the two Liverpool tunnels and bridge crossings in Warrington, 20 miles (32 km) upstream. The bridge also crosses the Manchester Ship Canal, providing sufficient headroom for shipping. It forms part of the major highway route in northwest England, carrying over 90,000 vehicles per day on four lanes. 

Since the mid-1960s, the highways in this part of England have been subjected to chloride-based deicing salts during the winter months. Chlorides have penetrated the concrete cover, and levels at the reinforcement commonly exceed 2% by mass of cement, which is more than sufficient to initiate and sustain corrosion.

Any closure for repairs would result in a diversion of at least 40 miles (64 km) and even partial closures result in heavy congestion to the local road network. Therefore, a remediation strategy rather than reconstruction plan was developed to prevent any traffic disruptions and subsequent detrimental effects to the local economy.

A lightweight, prefabricated bolt-on “cassette” cathodic protection system was identified as the most suitable solution. The system was originally developed for use on harbor structures in Norway and consisted of mixed-metal oxide-coated titanium (MMOTi) ribbon anodes in a glass-fiber foam-filled fiber-reinforced polymer (FRP) tray which are mounted to the underside of the bridge deck using sleeved bolts. 

To test its suitability, the cassettes were installed on a 200 ft (60 m) trial area on the soffit of the deck. The trial area was energized in October 2008 and protected over 600 square yards (520 square meters). The section was monitored over a period of 1 year and showed excellent results, demonstrating that the remaining suspended deck could be protected using this system.

ICRI Supporting Members


International Concrete Repair Institute, Inc.
1000 Westgate Drive, Suite 252
St. Paul, Minnesota 55114 USA
Phone: +1 651-366-6095

Copyright © 2015-2019 International Concrete Repair Institute, Inc. (ICRI) All rights reserved.

Privacy Policy | Antitrust Policy | Terms of Use | Contact Us | Site Map

This website is optimized for Firefox and Chrome.
If you have difficulties using this site, see complete browser details.