2024 ATB Errata

The following errata have been issued since the publication of the 2024 ATB:

April 2, 2025

Added capital cost breakdowns to the parameter data for Land-based Wind.
Numbers for 2033 and 2034 for Coal, Natural Gas, and Coal Retrofits were one year off of the intended number. The values for these years were corrected.
Corrected a formula issue where LCOE reflected financial values for one scenario instead of each scenario independently. This did not change numbers since the financial numbers do not vary by scenario in the default spreadsheet.
Hydropower corrected errors introduced into overnight capital costs while moving grid connection costs to a separate category.

The Offshore Wind CAPEX learning rates were corrected to intended values (for fixed-bottom offshore wind energy: 6.3% [Conservative], 8.8% [Moderate], and 11.2% [Advanced]; for floating offshore wind energy: 8.7% [Conservative], 11.5% [Moderate], and 14.2% [Advanced]). Cost trajectories and the Excel spreadsheet were adjusted to reflect the intended learning rates.
The Natural Gas 2-on-1 Combined Cycle H-frame 97% CCS costs and performance numbers have been corrected to the intended values. Previously they were a copy of the 95% CCS numbers.

Initial publication (submitted to OEDI June 24th).