Theories of domestic catâs For decades, many theories have existed to explain the origin of cats. Traditionally, most scholars believed that all domestic cats had a common ancestor in ancient Egypt, where cats were domesticated around 3,600 years ago. Other researchers believed that domestic cats had more than one ancestor, the result of domestication occurring at different times and places, each resulting in a distinct ancestral breed 1.
Railroads usually consider a 100 ft. width of right of way centered about their main track centerline as the minimum on which they can effectively operate. Any encroachment within this limit, even if it is only for ditch cleanout or erosion control, is not welcomed by the railroad and therefore is to be avoided.
The Monongahela Incline, built in 1870, is located near the Smithfield Street bridge, directly across the Monongahela River from downtown Pittsburgh. It has a length of 635 feet, a height of 367.4 feet, and a grade of 78%. Its lower station is across the street from the Station Square's Freight House Building. For more information about the Mon Incline call 412.442.2000 or view their web site at www.portauthority.org.