§ 11.3.12. Supplemental Construction

Conduits must be installed adjacent to retaining walls that support roadway embankment wherever geogrid, tie bars, rods or pre-cast units extend behind the wall. Two 4-inch (100 millimeters) diameter, Schedule 40 polyvinyl chloride (PVC) pipes must be provided between the retaining wall and street, parallel to the back of curb along the entire wall, to provide for future installation of utilities such as communications cables. Pull-boxes must be installed at the ends of the pipe and at intermediate points, as appropriate, but in no case shall the distance between pull-boxes exceed 200 feet (60 meters).