Curb stop boxes will be installed on the right-of-way line or easement limits at a location as determined by the City Engineer to be best suitable to the property and shall be left in a vertical position when backfilling is completed. Curb stop boxes will be installed at an approximate depth of eight feet below the finished ground elevation and the top of the curb stop box shall be adjusted to be flush with the finished ground elevation. Curb stop boxes must be firmly supported by a masonry block. No person shall erect any fence or plant any tree or other landscaping that would obstruct the use of the curb top box or cause damage to the same.