Guyana: Public Works Minister Addresses Concerns Over Demerara River Bridge Cracks and Rust

Public Works Minister Juan Edghill has stated that the surface cracks observed on the pedestrian walkways of the Bharrat Jagdeo Demerara River Bridge (BJDRB), which was completed eight months ago, do not pose any safety concerns. The bridge, which cost US$260 million, serves as an east-west link.

According to Minister Edghill, the cracks are a result of normal expansion and contraction of the bridge due to temperature changes and vehicle loads. He noted that inspections conducted confirmed that these fine surface cracks are a common occurrence. The deformation experienced by the bridge is transferred to auxiliary components, leading to the development of these cracks.

Edghill explained that contraction joints were installed in accordance with the American Association of State Highway and Transportation Officials (AASHTO) standards to help manage cracking. However, he acknowledged that due to the natural shrinkage of concrete materials, it is nearly impossible to completely eliminate all fine cracks in engineering structures.

The Minister clarified that the cracks are located on the pedestrian sidewalk and sleeper beam, which are auxiliary components and not part of the load-bearing structure of the four-lane cable-stayed bridge. He compared these components to the exterior wall finishes of a house, emphasizing that they do not contribute to the overall safety load of the bridge.

In response to concerns regarding corrosion on the bridge inspection vehicle track, Edghill indicated that the primary cause was the removal of the factory-applied anti-corrosion coating during the vehicle’s operation. He explained that exposure of the metal surface to moisture leads to surface rust, similar to what can occur on automotive brake rotors.

Edghill assured that this type of rust does not compromise the strength of the track, and the maintenance team will regularly apply touch-up coatings. He also mentioned that rust on some bolts was due to minor damage to the coating during installation. The contractor has been tasked with conducting rust removal and anti-corrosion treatments, along with inspections every six months.

He reiterated that neither type of rust affects the structural safety of the bridge and that ongoing maintenance will continue to be a priority.

Source: demerarawaves.com

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