R 0: SERC Shoreline
Steps from the Reed Education Center, sampling opportunities along the shore and off the dock. Depth: 0-1.5 m; Bottom substrate: sand.

R10: SERC Dock
Out on the water, feet away from SERC's dock. Depth: 2-3 m; Bottom substrate: mud.

R20: Camp Letts
Near Camp Letts between Sellman Creek and Whitemarsh Creek. Depth: 2-3 m; Bottom substrate: mud.

R30: Mid River
In the cove between Whitemarsh Creek and Cadle Creek. Depth: 2-3 m; Bottom substrate: mud.

R40: Canon Bay
Nested in a cove opposite the mouth of Cadle Creek, surrounded by agricultural land. Depth: 2-3 m; Bottom substrate: mud.

R50: Mouth of the River
At the mouth of the River. Depth: 2-3 m; Bottom substrate: sand.

R60: Chesapeake Bay
Depth: 2-4 m; Bottom substrate: mud.