Stability of Rock Masses on East Side of Rocky Gorge, Manitou Falls Area, Pattison State Park Open-file report; contains unpublished data that has not yet been peer-reviewed. Data and Resources WOFR1975-01 Stability of Rock Masses on East Side of Rocky Gorge, Manitou Falls Area, Pattison State Park Mengel, J.T.; 1975 Report: 7 p. Download Related Collections Open-File Report View Open-File Report