EFFECT OF LANDSIDE EXCAVATIONS ON 3D LEVEE UNDERSEEPAGE Navid H. Jafari, NSF Fellow Doctoral Candidate of Civil and Environmental Engineering University of Illinois at Urbana-Champaign 205 N. Mathews Ave. Urbana, IL 61801 njafari2@illinois.edu and Timothy D. Stark, Ph.D., P.E., D.GE Professor of Civil and Environmental Engineering University of Illinois at Urbana-Champaign 205 N. Mathews Ave. Urbana, IL 61801 tstark@illinois.edu February 4, 2015