Brass caps for horizontal and vertical control, set in concrete and stamped with elevation, located in a minimum of two (2) locations; three-fourths inch (3/4") diameter iron pin on boundary at perimeter angle points; five-eighths inch (5/8") diameter iron pin for lot corners; and PK nails at points of curvature in streets along centerline and reference stations. The monuments and locations shall be approved by the city engineer. (Ord. 854, 9-9-2002)