Glen Canyon National Recreation Area officials say boaters are advised that construction activities to extend the Stateline Auxiliary Ramp will begin on Monday. The ramp will be extended in one-half increments with two lanes remaining open to the launch and retrieval of vessels. No full closures of the ramp are anticipated while extension activities are underway. However, delays may occur due to temporary lane closures. This phase of the ramp extension is expected to be complete by October 30-th. Subsequent extensions will take place as water levels allow.