Things NOT to assume about surveys and boundary lines
Do not assume that anyone other than a registered land surveyor can determine the boundary lines (real estate agents, County/City officials, fence contractors, neighbors, etc)
Do not assume the property corner is at the water meter
Do not assume the property corner is at the light pole or power pole
Do not assume the property line follows the fence line
Do not assume the property line follows the change in grass type of planted shrubs
Do not assume the property line follows the silt fence installed by the builder