Concertgoers at The Canyons ski resort may have to dodge a few "Pardon our Dust" signs this summer.

The resort's owner, American Skiing Co., got the nod from the Summit County Commission last week to begin the initial construction phase of the resort's 15-year master plan.Workers are now involved in a summerlong project that will forever change the profile of Summit County's southernmost ski spot.

The first phase includes extensive construction and improvement of mountain and lodging facilities, said The Canyons spokesman Mike Grass.

Three new lifts - including two high-speed quads and one triple chair - will be installed in time for the 1998-99 ski season, raising the resort's lift roster to 11. One of the new lifts will replace an existing lift, while the others will take skiers to new destinations.

Plans are also under way to open the resort's highest peak for skiing. "This will mean a whole new level of skiing at The Canyons," Grass said.

The commission also approved installation of additional underground lines to expand the resort's snow-making capabilities and stretch the ski season during dry winters.

Workers will also begin building a 360-room hotel, dubbed "The Canyons Grand Summit Resort Hotel & Conference Center." The slopeside facility will be the first time lodging will be available at the resort.

The hotel is expected to open Thanksgiving of 1999.

The 150-room "Sundial Lodge" condominium hotel will also be built above several future restaurants and shopping centers that will eventually form a resort village.

Cost of the development's first phase? About $500 million.