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 Western Pacific Railroad Company built 132 mi or 212 km of track from Oakland/Alameda to Sacramento, California. The Central Pacific Railroad Company of California (CPRR) constructed 690 mi or 1,110 km eastward from Sacramento to Promontory Summit, Utah Territory (U.T.). And the Union Pacific built 1,085 mi or 1,746 km from the road's eastern terminus at Council Bluffs near Omaha, Nebraska westward to Promontory Summit.