← Case Studies
Proof Engineers: Haul Road Improvement (Indonesia Kalimantan)
Loaded Speed +43%Empty Speed +95%35% Reduction in MaintenanceWeather-Resilient Operations
Objective
Overcome challenges of soft rock geology and high tropical rainfall (3m/year) through expert material selection, drainage improvements, and road geometry optimisation.
The Challenge
- Geology: Absence of hard rock for road construction in a relatively young geological environment.
- Climate: Tropical climate with approximately 3 metres of annual rainfall.
- Existing Infrastructure: 30 km of haul roads constructed with no specific material selection, poor geometry, and inadequate drainage.
- Operational Impact: Roads were highly weather-sensitive, requiring large mud clean-up resources and resulting in low truck speeds (Loaded: 14.1 kph, Empty: 17.2 kph).
The Proof Engineers Difference
- Construction material selection.
- Drainage requirements and road geometry.
- Optimised road construction practices and a construction trial to measure performance.
Key Results
- Speed Gains: Loaded haul speeds increased by 43% and empty haul speeds increased by 95%.
- Operational Efficiency: 35% reduction in maintenance grading hours and lowered truck numbers required to meet budget.
- Weather Resilience: Haulage speeds remained consistent during and after wet weather events, requiring only minimal work to resume operations.