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Extreme weather forecasting for water resource management on Liberia mining project

We undertook EPCM services for the redevelopment of Tokadeh iron ore mine, a 150 km railway, the Port of Buchanan, workers campus and public highways upgrades. Run out of Oakville, Canada, this project involved expertise from across our global operations including the UK, South Africa and Liberia.

Our water sector expertise was paramount throughout the feasibility, detailed design and construction of this project. Together with stormwater management and drainage design services at the mine and port, we provided mine water resource management and planning to optimise operational water use and minimise water resource impacts.

Novel methods for extreme wet and dry weather forecasting were used to inform our stochastic water balance model. The modelling allowed for robust estimation of mine water use to ensure that during dry periods an appropriate balance between infrastructure contingencies and freshwater use is achieved.

The main elements of our work include

  • Mine water resources management
  • Stormwater management and drainage
  • Hydraulic design of structures; three dams >8m, bridges and watercourse diversions 

GIS was used throughout the project to facilitate

  • Remote mapping of surface and sub-surface watercourses and water features
  • Rapid provision of key hydrological model data
  • Topographical analysis
Location:Yekepa, Liberia, West Africa
Scope:Stormwater management and drainage design, water resource management and planning, water balance model, extreme weather forecasting, hydraulic design
Date:2010 - 2013