TWO Asian companies and four local ones will be subcontracted to produce gravel for the sealing of the Dreketi-Nabouwalu highway.
China Railway First Group spokesman Donald Singh said tenders would soon be awarded to the six companies for the task.
Mr Singh said the highway would require about 271,600 cubic metres of gravel for the sealing phase.
"One of the contracts will be awarded to a Taiwanese company and another to a Chinese company while the remaining four will be awarded to four local companies as subcontractors," he said.
"The company will soon advertise tenders for local companies interested."
Meanwhile project chief engineer Xiao An said of the four crushers needed, three were nearing completion while another had yet to be completed.
"The crushers are expected to produce 200 cubic metres of gravel in a day," he said.
"At the moment we have been keeping rocks unearthed during excavations, including those that have been extracted through dynamite explosions as part of our excavation processes.
"We will also work with resource owners and the government in the extraction of gravel from river sides along the highway."