Work to rehabilitate three tunnels along Olympic National Park’s Hurricane Ridge Road will begin Aug. 26.

Motorists should expect one-lane of traffic and delays of up to 20-30 minutes on weekdays through Oct. 22.

MJ Hughs, based in Vancouver, Wash., is the contractor for the $379,000 project. Scheduled work includes repairs and maintenance to the tunnels’ interior concrete liners and exterior portals, removal of vegetation and loose rock above the portals, application of concrete sealant and a new coat of reflective interior paint to provide improved visibility and safer conditions for drivers, bicyclists and pedestrians.

Hurricane Ridge Road will remain open throughout the work period, though traffic will be restricted to one lane through work zones to accommodate construction equipment and provide for public safety.

“Maintaining safe access into Olympic National Park is one of our top priorities,” Olympic National Park Superintendent Sarah Creachbaum said. “We recognize the inconvenience this work may represent to some of our visitors and we ask the public for their understanding and patience.”

Preparatory work begins Aug. 26 and delays of up to 20 minutes should be expected through Aug. 30. Rehabilitation work is scheduled to begin Sept. 3 and continue through Oct. 22. Delays of up to 30 minutes should be expected during construction.

Work will only occur weekdays between 6 a.m.-6 p.m.; no holiday or weekend work is scheduled.

Current road information is available by calling Olympic National Park’s recorded information line at 565-3131 or online at nps.gov/olym/planyourvisit/current-road-conditions.htm.