Bradley Lake expansion has carried three price tags in four months as the comment window closes

Alaskans have until 1 pm Alaska time on Aug. 28 to file comments, protests or motions to intervene on the Alaska Energy Authority's application to expand the Bradley Lake Hydroelectric Project. The price attached to the project has been stated three different ways in four months, and the three figures do not all measure the same thing.

The authority's July 21 board packet puts the total project budget at about $435.9 million, with the tunnel and diversion alone at $305.11 million, built on a construction estimate of $401.6 million dated February 2026. It states about $403.2 million in additional financing will be required. That construction figure is a Class 4 estimate, an early one prepared on limited information and carrying a wide accuracy range.

Two days later, the authority's written announcement described the total project cost as roughly $400 million, within $1.6 million of the packet's construction estimate. The authority's own project page uses about the same figure but calls it "the estimated construction cost," not the total. In April, General Counsel Mark Billingsley told the same board the updated total was $420 million.

The expansion would divert Dixon Glacier meltwater at the headwaters of the Martin River through a 4.6-mile tunnel into Bradley Lake, raise the lake's maximum operating pool about 16 feet, and add a 0.3-megawatt turbine at the dam's fishwater release valves. Average annual generation rises about 38 percent, from roughly 436,000 to 601,000 megawatt-hours. Bradley Lake supplies about 10 percent of Railbelt power.

The board endorsed a first round of borrowing: up to $100 million in commercial paper, secured by project revenues and a reserve fund the legislature can replenish.

Before bonds are sold, the Bradley Lake Project Management Committee — the authority and five purchasing utilities — must concur. It took the item up July 24 with an executive session attached. No minutes are posted for that meeting, though every earlier 2026 meeting has them, and the financing resolution does not appear on the committee's resolutions list.

Executive Director Curtis Thayer told the committee in June that the 16-foot raise is tied to federal tax credits that "could be up to $200 million."

The authority filed its final license amendment application June 30. Comments go to federal docket P-8221-124 through the commission's eFiling or eComment systems; emailed comments are not part of the record. Only those filing a motion to intervene become parties. The committee meets again Sept. 25.