Project Description: As a sub consultant to DMJM Aviation, RBI’s responsibilities were drainage design and CADD services. This project involved widening of taxiways SF, SG, SH, SJ, SK, SA and SB which required redesign of existing culverts to raise the head walls and wing walls, revise grading around the drainage ditches to establish new side slopes after widening of these taxiways and designed access ramp for maintenance.