Mainline Integrity Investigations

In 2013 Ahtna Construction was awarded 2 portions of the X513 Mainline Integrity Investigations Project - Release A (fall work) and Release C (summer Work). The overall scope consisted of 9 mainline pipe excavations on the Trans Alaska Pipeline System at mileposts 515.44, 574.49, 590.23, 593.87, 756.74, 757.87, 783.61, 794.64 and 798.97. Several of the excavations were located on steep slopes (PLMP 783.61 - 46% grade and PLMP 756.74 . 50% grade) that required special consideration and planning to complete the job safely. Work activities included road construction, pipe excavation, asbestos sampling and abatement, sandblasting, painting, cathotic protection installation and repair, slurry form and pour, back fill and site restoration.

Oil Spill Response

Ahtna Constructions Response Team at the Glennallen Response Base provides oil spill response in accordance with Alyeska Pipeline Service Company.s Oil Spill Contingency Plan. The crew is required to have cross functional training (composite crew) with the skill sets of a laborer, teamster and operator. In addition to always being response ready, crew members provide maintenance and construction services in support of baseline activities. Notable activities in 2013: Gulkana River Bridge Ice Jam Response, Right of Way Snow Removal, Aufeis Mitigation, Brushing, and Erosion Repairs. Oil Spill Activities were highlighted by participation in a combined resources drill on the Gulkana River in October.

VSM Replacement at Squirrel Creek

Support VSM replacement at PLMP 717.40, Squirrel Creek South Slope Bents 196 and 197. Ahtna Construction worked with the drilling contractor to place the VSMs. The main portion of this work was civil. Material from the hillside was removed and replaced with more stable material. Drilling pads were constructed to accommodate the drill rig operation. During site restoration wood chip were placed to insulate the hillside.

This Project started in June of 2012 and was completed in September of 2012.