Su-Wa Dam Site and Reservoir 09-2013 Rendering-Cropped

Alaska Energy Authority Releases Engineering Feasibility Report

In January 2015 Susitna-Watana Hydro released the Engineering Feasibility Report, which is the result of several years of collaboration among engineering contractors, dam-safety experts, utilities, the Federal Energy Regulatory Commission (FERC), and the Alaska Energy Authority (AEA) to design a safe and cost-effective project.

The completion of the Engineering Feasibility Report is a critical project milestone and concludes that the project is technically feasible. Comprehensive geotechnical investigations have confirmed that no active faults exist at the dam site and that the rock quality is suitable for accommodating the structure. The dam was designed to safely withstand seismic events and pass the probable maximum flood. The Board of Consultants, a group of international dam design and safety experts, has reviewed the key project elements and provided observations, which are included in the report.

AEA is working with the Railbelt utilities to optimize the project’s capacity and energy production while maintaining customary use of the Susitna River. As part of the ongoing optimization of the proposed project, the overall capacity rating of the three proposed turbines has been reduced to 459 megawatts while maintaining the same annual average energy production of 2,800,000 megawatt hours, more than half the Railbelt’s current demand.

The full report can be found on the Documents page.

In January 2015 Susitna-Watana Hydro released the Engineering Feasibility Report, which is the result of several years of collaboration among engineering contractors, dam-safety experts, utilities, the Federal Energy Regulatory Commission (FERC), and the Alaska Energy Authority (AEA) to design a safe and cost-effective project.

The completion of the Engineering Feasibility Report is a critical project milestone and concludes that the project is technically feasible. Comprehensive geotechnical investigations have confirmed that no active faults exist at the dam site and that the rock quality is suitable for accommodating the structure. The dam was designed to safely withstand seismic events and pass the probable maximum flood. The Board of Consultants, a group of international dam design and safety experts, has reviewed the key project elements and provided observations, which are included in the report.

AEA is working with the Railbelt utilities to optimize the project’s capacity and energy production while maintaining customary use of the Susitna River. As part of the ongoing optimization of the proposed project, the overall capacity rating of the three proposed turbines has been reduced to 459 megawatts while maintaining the same annual average energy production of 2,800,000 megawatt hours, more than half the Railbelt’s current demand.

The full report can be found on the Documents page.