Whole life cost over 60 years, the same horizon the carbon assessment uses
Discount rate3.5% realStudy period60 yearsBase year2026Residual value methodStraight linePrice basisQ3 2026, ENR CCI
Net present value
$412.8M
Discounted at 3.5% real, base year 2026
Undiscounted total
$492.2M
Sum of the cash flow below, before discounting
Discounting effect
16.1%
Reduction from nominal, driven by the long tail of operating years
Undiscounted cash flow, years 0 to 60
CapitalMaintenanceOperationsRehabilitationReplacementEnd of life
Bars are the cost schedule itself, not an illustration. The residual value credit falls in year 60 and is carried in the table below rather than drawn as a negative bar.
Cumulative cost over the study period
Nominal, undiscountedDiscounted, present value
The gap between the two curves is the discounting effect. Capital dominates the first five years, so half the present value is committed by year 3 even though spending continues for another 57. That is the argument for getting the material decisions right before construction starts.
Present value by cost category
Capital
$286.4M
62.7%
Maintenance
$61.2M
13.4%
Operations
$38.9M
8.5%
Rehabilitation
$42.1M
9.2%
Replacement
$18.7M
4.1%
End of life
$9.4M
2.1%
Residual valuecredit
-$43.9M
9.6%
Net present value
$412.8M
Shares are of gross cost before the residual value credit. Present values are computed from the cash flow schedule, so the chart above and this table are the same numbers.