Alaska Power and Telephone’s plan to install a submarine cable for the purpose of boosting Internet service in the Upper Lynn Canal has hit a roadblock and will be delayed until this spring, AP&T chief operating officer Michael Garrett said this week.

Garrett estimated the delay will cost about $600,000.

The Department of Natural Resources informed AP&T in September the proposed route for its 86-mile fiber optic cable runs through the Chilkat Islands State Marine Park. That means…