Place
- Iowa4
- Hacklebarney Woods County Park.3
- Dayton.2
- Glen Echo2
- Pine Hills2
- Plummer's Island2
- Plummer's Island in the Potomac River, near Cabin John2
- Plummers Island2
- Plummers Island, in the Potomac River near Cabin John2
- 0.3 miles west of Caddo Gap on Arkansas Highway 8.1
- 0.5 mi. e of Stewart, n of Hwy 82, w of Yates Creek.1
- About 4.5 mi north-northwest of Montgomery City on west side of gravel road, 1.3 mi north of Little Elkhorn Creek.1
- Above Evansburg1
- Above bed of Uwharrie River along Cottom Place Road, Uwharrie National Forest.1
- Along the Potomac River west of Cabin John1
- Bank of C. and O. Canal, between Great Falls and Cabin John1
- Bank of Patts Quarry, Conshohocken.1
- Bethesda1
- Between Great Falls and Cabin John1
- Between State Rte 16 & Conrail tracks, 7.9 mi NE of the middle of Irving.1