Macmahon (ASX:MAH) has announced it’s won a $61M contract from Gina Rinehart’s HanRoy to upgrade the WA-based Marble Bar Road. For the uninitiated, Marble Bar is a historic (and current) mining centre for WA mining operations; the 435km long road stretches from WA’s northwest coast down into the centre of the state. It is frequently used as a haul road along both of its sealed and unsealed sections before eventually intersecting with other major highways; a number of mining operations use the asset – but HanRoy are the body issuing $61M in funding to get it done. In all technicality, the contr…