Welcome to Tideline Construction, LLC.

Tideline Construction, LLC is a family-owned and operated construction business based in Juneau, Alaska. Founded in 2019 by William Tonsgard III, the company specializes in civil construction, including excavation, slope stabilization, material placement, road building, demolition, and rock crushing. Tideline has successfully completed numerous projects in Southeast Alaska, including in Juneau, Hoonah, Sitka, and Prince of Wales. The company’s commitment to high-quality, safe, and efficient work has earned it a reputation for completing projects ahead of schedule and providing a quality end-product. 

We are proudly Veteran Owned, and we are a registered DBE with the State of Alaska.