(Gretchen’s House, 13', 2003, 22-81-e) across dry ground in a playground SW of Ann Arbor, Pitsfield Charter Township, Washtenaw County, MI. Ann Arbor Saline Rd. SW 0.3 miles from jct with I94 exit 175 on the SW corner of Ann Arbor, W. on Waters Rd. 0.2 miles, N. on Oak Valley Dr. 0.9 miles to the bridge on the S. side of the road at 2340. (N42 15.088 W83 46.726) Photo by Mark Comstock 3-7-06.