Optic Surveys/GLH DATE June 2014 – Sept 2014 REFERENCE Josh Haynes Brockman 4 – Rio Tinto Provide survey shift cover for road construction. Assist with redesigns for drainage and road extensions. Create Machine Control files for Topcon Machine Control Graders and Excavators. By dsmith_wp_admin|2023-08-14T06:28:06+00:00September 1st, 2014|Rio Tinto|0 Comments