A study was conducted on the central coast of British Columbia to quantify the impact of seven ecosystem-based management (EBM) elements on timber supply, timing, and cost of harvest operations at the watershed level. The objectives of the study are addressed by comparing EBM vs. non-EBM scenarios through a series of three analyses. The first analysis calculates the even-flow annual harvest volume without imposing any constraints/limits on volumes harvested by conventional methods or by helicopter. The second analysis identifies the minimum re-entry time in the watershed when the conventional and helicopter harvest volumes are specified. In the third analysis, constraints on the wood volume harvested with different methods are maintained and the harvest volumes available are calculated assuming that the re-entry time is set at 30 years. When EBM elements are applied, the analyses identified reductions in harvest volumes ranging from 32 to 44%, depending on the constraints used in each analysis. Re-entry time also increased in the EBM scenario from 9 to 16 years. The cost of harvest operations was found to be variable as it is influenced by the percentage of conventional and helicopter blocks harvested in each scenario and the cost assumptions used. Given the reduction in harvest volume, an increase in road construction cost ranging from $9.25 to $12.78/m3 for the EBM scenario was noted. Also, the incremental changes in trucking cost varied between $0.15 and $0.18/m3.