Complex sentence: Not unlike the privies, cisterns, and wells that historical diggers attempt to salavge in, dumps are often fleeting sources, located on properties which are in the process of being permanently altered by major development and other factors.
Split into simpler sentences: Not unlike the privies, cisterns, and wells that historical diggers explore and salavge in, dumps are typically fleeting sources. They are often located on properties which are in the process of being permanently altered by major development and other factors.