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Pier piling Monterey, CA

Penobscot Bay, Camden, ME

Cocheco River, west bank near the Lower Narrows and west of McKone Road Landing, Dover, NH; 43.192695 -70.853286

Crommett Creek, a tributary to Great Bay at Durham Point Road, Durham, NH; 43.098024 -70.883176

Nubble Lighthouse, Cape Neddick, ME

Brooklyn Bridge on St. George River, just above the dichotomy of the Mill River, Warren, ME; 44.07154 -69.188106

on the Chewonki Campground Waterfront up to Hoyt's Point, Back River (Sheepscot), Wiscasset, ME; 43.954641 -69.719229

Adams Point at Furber Straits, Junction of Little and Great Bays, NH

Mousam River at Route 9, Kennebunk, ME; 43.351504 -70.518157

Cedar Point, SCUBA, Little Bay, NH; 43.129826 -70.852716

Fort Stark, Jaffrey Point, SCUBA, Newcastle Island, NH

Rye Harbor, Ragged Point, Rye, NH

Fort Stark, Jaffrey Island, Newcastle Island, NH

East Quoddy Head, Campobello Island, NB, Canada

boat ramp and picnic facility at Robbinston off of Route 1, Robbinston, ME; 45.083007 -67.108659

a submerged "ledge" offshore from the waterfront at the Chewonki Campground, Chewonki Neck, Montsweag Bay, Wiscasset, ME; 43.954 -69.72146

Fort Stark, Newcastle Island, SCUBA, Rye, NH; 43.058519 -70.712228

Fort Stark, Jaffrey Point, Newcastle Island, ME

Pennamaquan River near Hersey Neck Road, Pembroke, ME; 44.942326 -67.162547

Durham Point, Little Bay, Durham, NH

Piscataqua River, just north of Adlington Creek, on the east bank, Eliot, ME; 43.122325 -70.811734

Crommett Creek, a tidal tributary to Great Bay at bridge at Durham Point Road, Durham, NH; 43.098024 -70.883176

Chapman's Landing at Route 108, Squamscott River, Stratham, NH; 43.039614 -70.927476

Crommet Creek, a tidal tributary to Great Bay at Durham Point Road, Durham, NH; 43.09817 -70.88342

York River Estuary, #20, York, ME

St. Croix River at Robinston boat ramp and picnic area, Robinston, ME; 45.083052 -67.108991

Chapman's Landing, at route 108 on the Squamscott River, NH; 43.039614 -70.927476

Cedar Point, SCUBA, Little Bay, NH; 43.129716 -70.852437

Campus Point, University of California, Santa Barbara, CA; 34.404851 -119.844198

Wallis Sands Beach, near the State Park, NH

Near Fisherman's Pier, Piscataqua River, Portsmouth, NH

Union River Boat Ramp, Ellsworth, ME

end of Colony Cove Road, Durham Point area, Little Bay, Durham, NH; 43.115377 -70.868036

end of Colony Cove Road, Durham Point area, Little Bay, Durham, NH; 43.115527 -70.867851

in front of the Jackson Estuarine Laboratory, SCUBA, Adams Point, NH; 43.092102 -70.86461

Crommett Creek, tributary to Great Bay at Durham Point Road, Durham, NH; 43.098024 -70.883176

Town Wharf, Piscataqua River, Newington, NH; 43.109673 -70.804237

Bald Head Cliff, York, ME; 43.221111 -70.575468

end of Colony Cove Road, Durham Point area, Little Bay, SCUBA, Durham, NH; 43.11553 -70.867736

Piscataqua River, west bank, just east of Pineview Road, approximately opposite Stacey Creek, Newington, NH; 43.137302 -70.832763

Nubble Lighthouse, Cape Neddick York, ME; 43.165517 -70.592718

Fort Star, Jaffrey Point, Newcastle Island, Rye, NH

Site 17D, collected in the intertidal zone of the Piscataqua River, Eliot, ME; 43.145747 -70.832049

St. George River at Boat Ramp, Thomaston, ME; 44.07171 -69.182424

area near the Schiller Power Plant, Piscataqua River, SCUBA, Newington, NH; 43.098241 -70.783116

Cocheco River, west bank near the Lower Narrows and west of McKone Road Landing, Dover, NH; 43.192695 -70.853286; 43.192695 -70.853286

Fort Constitution, Newcastle Island, Rye, NH

end of Colony Cove Road, Durham Point area, Little Bay, Durham, NH; 43.115377 -70.868036

stream from Billings Pond entering Salt Pond, i.e. off Rt. 172, Sedgwick, ME; 44.35461 -68.582026

Moose Cove, Trescott, ME; 44.74068 -67.123398