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junction of River and Clark Roads on the Cape Neddick River, (0.6 miles upstream from mouth), York, ME; 43.192904 -70.614455

Fort Preble, near Southern Maine Technical College, Portland Harbor, South Portland, ME; 43.64833 -70.22639

Brave Boat Harbor, Kittery side of outermost harbor on Cutts Island, at outermost bridge pilings near the mouth (east side) of a major tributary delineating the island; 0.38 kilometers inland, site # 5, Kittery, ME; 43.098543 -70.659433

Little Diamond Island, at cove connecting Great Diamond Island on east end of Island, Casco Bay, ME; 43.671744 -70.204318

Fore River, off Commercial Avenue and midway between Veterans Memorial Bridge and Million Dollar Bridge, also in front of Benny's Famous Fried Clams, Portland, ME; 43.642787 -70.272526

Peaks Island, opposite Great Trout Pond and bunker, Portland, ME; 43.661162 -70.18843

Peaks Island, cove just east of Long Point near marine Civil War Memorial and across from Cushing Island, Casco Bay, ME; 43.651972 -70.193548

Bay View rock outcrop at Ferry Beach State Park, Saco, ME; 43.481122 -70.384416

Doyle Point, Cousins Island, Yarmouth, ME; 43.75201 -70.140017

Great Diamond Island, marsh/mudflat and cove between Great and Little Diamond Islands, west side of Great Diamond Island, Casco Bay, Portland, Me; 43.671744 -70.204318

on docks of the University of New England campus, Saco River, Biddeford, ME; 43.460421 -70.385886

Fort Foster, Gerrish Island, Kittery, ME; 43.06629 -70.691924

Portsmouth Harbor, at Fish Coop, Portsmouth, NH; 43.075403 -70.748863

Biddeford Pool at end of 3rd Street between East and South Points, Biddeford, ME; 43.442726 -70.340372

Duck Island, Isles of Shoals, SCUBA, Kittery, ME; 43.004846 -70.60463

Brave Boat Harbor Marsh, Site 3, approximately 0.37 kilometers inland from mouth, on Cutts Island near the mouth of a sandy embayment, Kittery, ME

Little Bay, Site 2, across from Adam's Point, SCUBA, NH

Biddeford Pool, site proper, Biddeford, ME; 43.445966 -70.356703

Brave Boat Harbor marsh, Site 9, approximately 0.65 kilometers inland from mouth on Kittery side somewhat diagonal (southwest) from a small embayment on York shoreline, Kittery, ME

Biddeford Pool at end of Road and 3rd Street (i.e. near fire station), Biddeford, ME; 43.442726 -70.340372

piling 3e of new bridge, Dover Point Side, Dover Point, SCUBA, Little Bay, NH; 43.118895 -70.826936

Moody Point, Wells, ME; 43.28528 -70.57056

Brave Boat Harbor on the Kittery side of Cutts Island at outermost bridge pilings & near the mouth (east side) of a major tributary delineating the island, =site #5, Kittery, ME; 43.092272 -70.665646

Pine Point breakwater and nearby river mouth, Scarborough River, Scarborough, ME; 43.541256 -70.334703

Cape Elizabeth Light, Cape Elizabeth, ME; 43.559147 -70.204165

Fore River, at international ferry terminal, Portland, ME; 43.659728 -70.246299

Portland Harbor, at Sunset Marina, off Fore Street, Portland, ME; 43.65056 -70.2425

Station 17, near the site of the Schiller Power Plant, Piscataqua River, Eliot, ME

Cape Neddick Campground, at Route 1a Bridge and adjacent sandy/rocky beach, at mouth of Cape Neddick River, York, ME; 43.18832 -70.605207

Site #5, north bank of river by Route 103 Bridge, York, ME; 43.136156 -70.648177

Brave Boat Harbor, at about 0.06 kilometers upstream from the third major tributary's mouth and about 1.26 kilometers inland, site T3a, Kittery, ME; 43.108194 -70.667888

Cape Neddick River, approximately 8.5 miles upstream from Route 1a on River Road, Cape Neddick, York, ME; 43.193103 -70.614476

Site 12, North Bank of York River, opposite Ramshead Point, York, ME

Fort Stark, SCUBA, Newcastle, NH; 43.058681 -70.712429

Fore River, at end of Waterman Drive and Route 77 junction near Million Dollar Bridge, South Portland, ME; 43.634681 -70.257333

Sea Gull Beach, West Yarmouth, MA; 41.635667 -70.224464

Inner Mill Pond, Portsmouth, NH; 43.077313 -70.766322

Parson's Beach, near the mouth of the Mousam River, Kennebunk, ME; 43.343736 -70.519574

Mousam River marsh, at first bridge back from Parsons Beach, Kennebunk, ME; 43.351379 -70.5182

Brave Boat Harbor marsh, approximately 1.55 kilometers upstream from the third major tributary's mouth and at the third major tidal junction, Kittery, ME; 43.097353 -70.669046

Bound Rock, Seabrook, NH; 42.892103 -70.810899; 42.892103 -70.810899

bridge/culvert area on Webhannet Marsh off of Drake Island Road, Wells, ME; 43.330354 -70.557701

Site 1, Little Bay, across from Adam's Point, SCUBA, NH

Brave Boat Harbor marsh, site #9, approximately 0.65 km inland from mouth and somewhat diagonal (southwest) from an embayment on the York shoreline, Kittery, ME; 43.097353 -70.669046

Inner Cutts Cove, Piscataqua River, Portsmouth, NH; 43.08461 -70.766366

Site 7, North Bank of York River at Sewall Bridge, York, ME

South Mill Pond, Portsmouth, NH; 43.072447 -70.753516

Seapoint, near Crescent Beach, Kittery, ME; 43.085987 -70.6597

Pier at University of New Hampshire Coastal Laboratory, with Rapid Assembly Study, Newcastle, NH; 43.072014 -70.711993

mouth of the Webhannet River (breakwater), Wells, ME; 43.317752 -70.556249