D1 finds practical, safer method to remove hazard trees

After more than 400 trees were removed during a five-week summer operation, Interstate 90 east of Coeur d’Alene will be safer for drivers this winter.

The hazard trees have been a chronic problem for this section of I-90 that runs through the Coeur d’Alene National Forest. Transportation Techs in that area routinely pick up downed trees after windstorms, and continuous shade on the mountain pass where very little sunlight shines through creates icy conditions that require extra attention from crews.

“Clearing the right of way has been on my to-do list for some time,” foreman Dave Palmer said. “This summer, we were finally able to find a practical solution.”

The Cedars maintenance crew was able to remove so many trees in the two-mile section by using an excavator with a modified grapple extension. This equipment combination was able to not only enhance safety during the removal process but also to expedite it.

The grapple keeps the hazardous trees still and upright while another crew member cuts the tree with a saw at the bottom. After the cut is finished and the tree is ready to fall, the excavator operator is able to control it, allowing the employee on the ground to safely leave the immediate area. Since the direction of the fall is also controlled, only one lane of traffic needs to be closed during the work.

“In the past, we had to look to hire a contractor to come remove trees for us. One project was never funded but estimated to cost $50,000 per mile,” Palmer said. “This way is safer for the public and our employees, causes fewer impacts for drivers and saves the department money.”

While his crews gear up for another winter season on two mountain passes, Palmer says they already plan to repeat this process next summer.

Published 10-12-18