The trail was there until 1802 , when a turnpike , a type of road , was built over it `` for improving and making a road from the west line of the Town of Salisbury in the State of Connecticut to the Susquehannah River at or near the Town of Jericho '' . The trail remained intact until 1802 , when part of the Ulster and Delaware Turnpike was chartered over it `` for improving and making a road from the west line of the Town of Salisbury in the State of Connecticut to the Susquehannah River at or near the Town of Jericho ( present-day Bainbridge ) '' .