US: The US Customs and Border Protection plans to start awarding contracts by mid-April 2017 for a proposed border wall with Mexico. The agency says it will request bids on or around 6 March 2017 and that companies would have to submit ‘concept papers’ to design and build prototypes by 10 March 2017, according to the Associated Press. Finalists must then submit offers with their proposed costs by 24 March 2017. No details on where construction will start or how much it will be cost have been released.

Estimates for the cost of a 2000-mile border wall vary significantly. The Government Accountability Office estimates it would cost on average US$6.5m/mile for a pedestrian fence and US$1.8m/mile for vehicle barriers. However, an internal Homeland Security Department report prepared for department secretary John Kelly places the bill at about US$21m according to an anonymous source quoted by the Associated Press. It proposes that existing barriers built during the George W Bush administration be extended first in stages.

The cost of the wall will depend on the height, materials and other specifications of the project. Granite Construction, Vulcan Materials and Martin Marietta Materials are all likely to be potential bidders and Mexico’s Cemex is also likely to benefit from any increase in demand for construction materials in the region.