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.
In the Residential Zones in our city we normally have a 30 foot street within a 50 foot Right-of-Way. This leaves 10 feet on each side of the street. We normally have our 4 foot sidewalks placed a maximum of 2 feet back from each curb. This allows space for the drainage catch basins, street signage, and mailboxes. It purposefully does not allow enough space for trees, but is conveniently narrow enough to step over (if muddy) to reach the sidewalk from a parked car. This leaves 4 feet between the back of the sidewalk and the ROW line on each side. This is space for street lights, cable TV, underground power and telephone lines. Water and sewer lines with related manholes tend to wander throughout the ROW as needed based on terrain and curvature of street and its ROW.