Table 14.4 lists some key economic figures regarding the Valioso Mine project. The project uses a discount rate of 15% and is profitable with a discount rate up to 51% (See Figure 14.4). The discounted ROI to investors is 170%. Despite having a relatively small revenue stream, due to the small deposit of moderate grade, the capital costs are low enough to result in an NPV of $83 million. The capital costs are low due to the small production rate of the mine and the 60% subsidy of infrastructure offered by the Colombian government. The discounted payback period is 5 years, just under half the of the project life, shown in Figure 14.2. This may be an issue for investors who are looking for shorter payback periods. Figure 14.3 shows the discounted
