FRISCO — Colorado’s Keystone Resort is asking the U.S. Forest Service to allow it to build a lift that will provide better access to nearly a square mile of high-alpine bowl skiing. The resort wants more people to ski and snowboard the Bergman and Erickson bowls, which can now only be reached by hiking or by using the resort’s Sno-Cat service, The Summit Daily reported Friday. The winter-only proposal would include a new lift in the Bergman Bowl, as well as new snowmaking operations, trails and a warming hut, resort spokeswoman Loryn Roberson said. The Forest Service has been working with Keystone on the plan and visited the area over the summer to gauge how water, wildlife and wetlands would be affected. “One thing going for this project is there’s been public use back there,” said Dillon District Ranger Bill Jackson.