L - Alaska Energy Data Inventory

COST ESTIMATESDETAILED COST ESTIMATESTables B-1 and B-2 present the cost estimates for Watana and DevilCanyon.The estimates are presented in as much detail as possible based onthe concept drawings. Unit cost for a major items also includes minoritems that will appear as bid items as the design progresses.Extensive use has been made of bid abstracts from similar projectsconstructed in the western United States and Canada. All abstractedcosts have been escalated to the October 1978 level and an additionalfactor applied to reflect the higher cost of construction in Alaska.The Alaska Power Administration (APA) prepared the transmissionline cost estimate and have updated the estimate to the October 1978level. The transmission line cost estimate includes all structures,equipment and transformers for the switchyards and substations forWatana, Devil Canyon, Fairbanks, and Anchorage. The transmission linecost is shown in Table B-1, Watana.The transformers 1 isted under "Switchyard" in Tables B-1 and B-2are located in an underground transformer chamber adjacent to the powerhouse.The cables listed connect the transformers to potheads locatedin the switchyard.The APA estimate did not include earthwork for the switchyards.This cost is shown under "Switchyard" "in Tables B-1 and B-2.The following lists the estimated January 1975 cost and the October1978 cost.WatanaDevi 1 CanyonThin Arch DamConcrete Gravity DamJan 1975($1 ,000)$1,088,000432,000Oct 1978($1,000)$1,765,000665,000823,000The project cost used in the economic analysis includes Watana andthe concrete gravity dam plan at Devil Canyon. The total cost is$2,588,000,000.B-9