Section 27581 Of Article 2. Survey Markers From California Government Code >> Division 2. >> Title 3. >> Part 3. >> Chapter 11. >> Article 2.

. All monuments located in public highways shall be placed with the top not less than 12 inches below the surface of the ground, but when not located in public highways, they shall be placed with the top six inches above the surface of the ground. If the top of the monument is placed above the ground and is of metal, it shall be not less than four feet long.