1/4/2017 · It is therefore determined that DPW's Public Works Transportation Standards and Details for the Engineering Division (PWES-001.5), Curb & Gutter and Detached Sidewalk (Std. Dwg 5.0), Note 4, subsection b), enacted April 1, 2017 shall be waived and replaced with the following statement: Sandstone must be at least 2-1/2" thick by 5' long (minimum