(IL-99-10) in St. Joseph Park in Joliet, Will County, IL. IL7 (Theodore St.) W. 0.6 miles from jct with IL53 in Joliet to the entrance to St. Joseph Park on the S. side of the road. The building is in the park within a chain link fence. (4-6-02, N41° 33.046', W88° 05.977')