(Plymouth Place, IA-77-13) in Des Moines, Polk County, IA. 42nd St. S. 0.3 miles (2 blocks) from jct with I235 exit 6 in Des Moines, E. on Ingersoll Av. ½ block to the bldg on the N. side of the road at 4111 Ingersoll Av. (4-29-04, N41° 35.210', W93° 40.420')