A team comprised of sixteen Civil Engineering students, from Cal Poly Pomona, developed and designed a Wildlife Crossing System for Interstate 15 in Temecula, CA. This project drew from research collected by UC Davis Wildlife Health Center and The Nature Conservancy on the local populations of California Mountain Lions in Temecula. With this biologist data the students then developed engineering solutions to help create safe passageways for the Mountain Lions and other native wildlife. The system includes a wildlife overpass, culvert, and underpass. The team of students conducted their own research into wildlife crossings, site selection for each passageway, structural analysis, hydrology analysis, vegetation design, earthwork, foundation design, fencing design, and cost analysis. This project is very important to the survival of the California Mountain Lion in this area and is an engineering solution that helps combat the human effect on native species.