Lower Rattlesnake Historic District ID: 1272 | This file appears in: Lower Rattlesnake Historic District Lower Rattlesnake Historic District. View of the Rattlesnake Valley from Mount Sentinel. Interstate 90 cut across this landscape in 1966, making it necessary to move Greenough's mansion and to demolish many other buildings. The residential neighborhood continues to develop and change. | Creator: Chris Autio | Date: Fall 2006 | Source: Montana History Portal | Rights: Copyright University of Montana Mansfield Library Download Original File CreatorChris AutioSourceMontana History PortalArchival Photographs from the University of MontanaDateFall 2006RightsCopyright University of Montana Mansfield Library "Lower Rattlesnake Historic District" appears in: Lower Rattlesnake Historic District