Draw a network diagram for the project using the precedence diagramming method (PDM) and the following node notation format: ES ID EF TS FS LS Dur LF nu ES = Early Start ID = Activity ID EF = Early Finish TS = Total Slack FS = Free Slack LS = Late Start Dur = Duration LF = Late Finish = Activity ID Predecessors Duration (weeks) 2 A B 6 6 4 A B D E F 3 4 1 2 G H C, E D G 3 J K F G 2 L Activity Description Perform detailed site investigation and survey Prepare detailed plans Detailed design Prepare site Relocate services Realign overhead track electrification Construct access road and ramp Construct pilings Construct foundations and abutments Construct temporary supports to support bridge decking during construction Plan fabrication of structural steel components Manufacture structural steel components off-site Transport structural steel components and assemble on-site Erect pylons and fill with concrete Construct main span deck on pre-cast concrete beams Install stay-cables and lift bridge deck off temporary supports Remove temporary supports Install electrical system Pave roadway surface Perform finishing and ancillary tasks Commission bridge - cut over traffic Formal hand-over and ceremony Project sign-off Administrative closure Project end (milestone) M L M N P Q R S T U V w 2 1 2 3 3 H, K, N, P Q R S 1 1 2 2 1 TU 1 Y 1 V w X w Y, Z 1 Z AA 0