The ANCSA 17(b) Easement dataset represents spatial location and basic information about 17(b) easements within the state of Alaska. ANCSA 17(b) easements are rights reserved to the United States in accordance with 43 CFR 2650.4-7 Public easements. They are reserved to provide access to public lands or major waterways. Most often, these reservations are transportation easements including: 60-foot wide existing roads, 100-foot wide proposed roads, and 25- and 50-foot existing and proposed trails. Site easements and miscellaneous easement may include aircraft landings, vehicle parking, temporary camping, and loading and unloading areas. These rights are reserved when the BLM conveys land to a Native corporation under the Alaska Native Claims Settlement Act (ANCSA).