- Leer Twp.2
- Leer, 2 mi SE of; 2nd limesink2
- Near Hubbard Lake2
- Near Whitefish Bay.2
- S of Leer.2
- S side of Potter Point. 6.4 mi ENE of Alpena.2
- Thunder Bay Island2
- About 300 feet NW of 4 mile dam. Alpena Twp.1
- Along east side of Herron Road, Maple Ridge Twp.1
- Along shore of Lake Huron at Ossineke State Forest Campground.1
- Alpena Co., high on bank of U.S. 23 S. ¼ mi., S. of Squaw Bay1
- Alpena County Park, S. of bath house.1
- Alpena Township.1
- Alpena Twp. at N.W. edge of Evergreen Cemetery on M-32 W. on W. side of Alpena.1
- Alpena Twp. T31N, R8E, Sec. 22 NE1/4 on E. side of Alpena Power Co. storage-garage building at the Ninth St. Dam on the Thunder Bay River.1
- Alpena Twp. T31N, R8E, Sec.21, SW1/4 at N.W. edge of Evergreen Cemetery on N. side of M-32 on W. side of Alpena.1
- Alpena Twp. T31N, R9E, Sec.10 SW1/4 about 5 mi. N.E. of Alpena on the north side of Indian Road.1
- Alpena Twp. 200 ft. N. of Long Rapids Rd.1
- Alpena Twp. 2½ mi. S. of North Pt. Rd. about 4 mi. S.E. of Alpena. 50 ft. N. of Lake Huron shore at the address of 8286 North Pt. Shores Rd.1
- Alpena Twp. 5 mi. E. of City of Alpena.1