BGC Contracting, Decmil Australia and Rapid Crushing & Screening Contractors have inked separate deals with Pilbara iron ore miners Atlas Iron and BC Iron.
Atlas and its joint venture partner Altura Mining announced that the development, mining and crushing and screening work at the Mt Webber mine would be conducted by BGC, while the mine's accommodation village would be built by Decmil.
BGC said the total contract sum for its three contracts was about $300 million, with a peak workforce of 120 people.
It said the initial mining production would be 3 million tonnes per annum, with the intention to increase to 6mtpa at some time during the five-year contract.
Site construction works started at Mt Webber in July after Atlas formally announced its decision to proceed with the mine.
The joint venture is aiming for first shipments from Mt Webber during the second quarter of 2014.
Atlas holds a 70 per cent stake in the project with Altura having the remaining interest.
BC Iron announced today that it had appointed Rapid Crushing for a beneficiation trial at its Nullagine iron ore joint venture with Fortescue Metals Group.
The company said the trial would use a crush and screening process to treat material from low-grade stockpiles and newly-mined low grade material to create a higher-grade, or beneficiated, product.
The product will then be transported to Port Hedland and blended with BC Iron's Bonnie Fines product stream.
BC said the trial was expected to be complete by the end of the year, with first sales of the blended ore in early 2014.
Also today, BC and its alliance partner Cleveland Mining Company announced the formalisation of agreements to acquire up to an 80 per cent stake in three iron ore exploration projects in Brazil.
The companies announced two non-binding memoranda of understanding in May to acquire the interest in the projects, which are located in the Brazilian states of Bahia and Minas Geras.
The acquisition will take place via a staged earn-in arrangement.
BC said today it had signed binding agreements with Cleveland and Bahia Mineral Exploration to formalise the earn-in agreement.
BC and Cleveland will fund exploration activities under the first phase of the arrangement with no minimum spend requirement.
"Greenfields exploration projects are an important component of a balanced project pipeline and compliment BC Iron's interest in the NJV operation and the Pilbara, which remains our key focus for growth opportunities," BC Iron managing director Morgan Ball said in a statement.
"The earn-in structure allows the alliance to assess the prospectivity of the Brazilian tenure in a staged manner with low initial expenditure and optionality."
At 11:30AM, WST, Atlas Iron shares were down 0.35 per cent, at 86.2 cents, while BC Iron's stock had gained 2.6 per cent, at $4.34.