Bridge Survey & Monitoring - Manilla, Gunnedah, Bingara & Bingara

The Challenge:

Mitchel Hanlon Consulting was engaged in 2005 to survey 5 heritage listed wrought iron bridges at Manilla, Gunnedah, Bingara and Bundarra.

These bridges had been built in the late 1880s and are still in use as road bridges. Our task was to determine a mathematical model of each bridge (to 10mm) and to prepare a survey report detailing the topographic features and elevation of the surrounding landscape including roads. We were required to report on whether the roads satisfied current road standards and on any irregularities in bridge postion and elevation.

The Solution:

Due to the high elevations and span distances, it was decided the best means of supplying the deliverables was to use laser scanning for the bridge underdeck and to carry out conventional total station surveys of the bridge decks, the bridge trusses and approach roads.

A high level of accuracy was required within the survey control network otherwise it would be imposible to join the individual laser scans.

In 2014, we were asked to resurvey the historic Namoi River bridge at Manilla to check if there had been any movement since the earlier survey. We now undertake regular surveys of the bridge to monitor its movement.

Contact Us

You can contact us anytime

Phone 02 6762 4411

Fax 02 6762 4412

Mitchel Hanlon Consulting Pty Ltd ABN 51 104 693 736