Mollusks-Gastropods
Potamopyrgus
antipodarum
New Zealand mudsnail
OR
Baker
Snake River, River Mile 274
Clatsop
Columbia River at Astoria, Oregon [Youngs Bay]
Columbia River, Astoria West Moorage Basin
Columbia River, Knappa Slough dock.
Columbia River, Lois Island
Columbia River, Miller Sands, interior.
Columbia River, Sand Island #1, high pool.
Columbia River, Tansey Point
Columbia River, Trestle Bay, far northern mud flats.
Columbia River, Trestle Bay, Jetty Lagoon
Columbia River, Youngs Bay, Astoria Yacht Club near net pens.
Hanson Slough [near Columbia River in Oklahoma Hill]
Lewis and Clark River, culvert.
Lewis and Clark River, middle.
Lewis and Clark River, old dock
Lewis and Clark River, old dock structure.
Lewis and Clark River, River Mile 5, Lewis and Clark National Historical Park [just SE of Warrenton]
Skipanon River pond, Warrenton.
Youngs Bay, Wallooskea tideflat.
Youngs River, Klatskanie.
Youngs River, lower estuary.
Youngs River, mouth in Youngs Bay
Youngs River, upper bend.
Youngs River, upper estuary.
Coos
Coos Bay, Doris Place Boat Ramp
Coos/Curry
New River [See Coos/Curry County line]
Curry
Garrison Lake, in Port Orford, west of hwy 101
Rogue River at Gold Beach boat basin
Rogue River Estuary
Douglas
Umpqua River [~10 mi W of Scottsburg]
Jefferson
Crooked River, at mouth
Deschutes River, between Warm Springs and Trout Creek Campground [near Gateway]
Lincoln
Alsea Bay [near Waldport]
Devils Lake [near Lincoln City]
Yaquina Bay [near Newport]
Malheur
Bully Creek at Hwy 20 (R.M. 2.3) [just SW of Vale]
Bully Creek at Hwy 20 crossing (R.M. 2.3) just SW of Vale, OR
Crooked Creek-Sportsmens Club ramp
Malheur River [just N of Ontario]
Owyhee River, Birch Creek
Tillamook
Tillamook Bay
Wallowa
Snake River, Mile 190
Snake River, river mile 246
Wasco
Deschutes River at Heritage Landing [near mouth]
Deschutes River near Wapinitia [Creek mouth]
WA
NULL
Columbia River, lower portion
Cowlitz
Columbia River near Kalama, WA
Columbia River, Carrolls Channel, shallow flats
Columbia River, Sportsmens Club boat launch, Kalama
Columbia River-Sportsmens Club ramp
Pacific
Columbia River, Baker bay, Fort Columbia State Park tide flats.
Columbia River, Baker Bay, Ilwaco Harbor tideflat, outer rocks
Columbia River, Baker Bay, Ilwaco Harbor.
Columbia River, Baker Bay, west side of east channel, near USCG station.
Columbia River, Fort Canby, boat launch, high and low marsh.
Columbia River, Ilwaco Channel, Fort Canby State Park, exterior jetty.
Columbia River, Ilwaco Channel, Fort Canby State Park, interior.
Columbia River, Megler Rest area, benthic rocks
Thurston
Capitol Lake, Marathon Park in Olympia, at a small dock
Wahkiakum
Columbia River, Grays Bay, Grays River mouth.
Gray's River, near Roseburg
Crustaceans-Crayfish
Orconectes
neglectus
ringed crayfish
Little Butte/Lick Creek watershed on Medford BLM land (6th field watershed)
Little Butte/Lick Creek watershed on Medford BLM land (6th field watershed).
rusticus
rusty crayfish
Grant
John Day River
John Day River, 90-km segment from Dayville to Mt. Vernon
Procambarus
clarkii
red swamp crayfish
Linn
Cox Creek, a tributary of the Willamette River located in Albany
virilis
virile crayfish
Chelan
Wapato Lake
Ferry
Franklin D Roosevelt Lake [=Columbia River ~10 mi N of Inchelium]
North Twin Lake
Franklin D Roosevelt Lake [=Columbia River near Grand Coulee]
Moses Lake
King
Beaver Lake [~2.5 mi E of Inglewood]
Easter Lake [in Federal Way]
Five Mile Lake [just W of Algona]
Lake Geneva [just NW of Algona]
North Lake [just E of Federal Way]
Pine Lake
Pine Lake [just E of Sammanish Lake]
Steel Lake [in Federal Way]
Trout Lake [~1 mi SW of Algona]
Okanogan
Patterson Lake
Rufus Woods Lake [=Columbia River]
Pierce
Spanaway Lake [in Spanaway]
Surprise Lake [in Milton]
sanbornii
Sanborn crayfish
Skagit
Big Lake [~4 mi SE of Mt. Vernon]
Snohomish
Lake Ballinger [~3 mi E of Richmond Beach]
Lake Ketchum
Silver Lake [~2 mi E of Fairmont]
Plants
Iris
pseudacorus
yellow iris
Benton
NW of Coffin Butte
Clackamas
Columbia River, lower, at Fitzpatrick Island
Camp Rilea, SW of Warrenton, W fork of Neacoxie Creek
Coastal
Columbia River Estuary.
Miller Sands Island, in the Columbia River, 5 miles upriver from Astoria.
Columbia
West Rainier
Deschutes
Biak Training Center; end of a Redmond Airport runway
Redmond irrigation canal
Lake Billy Chinook
Marion
Salem; ditch along Cordon Road near its junction with Herrin Road.
Multnomah
Sandy River, middle to lower
Tillamook Bay, Cape Meares area
Umatilla
Milton-Freewater, Walla Walla Rd., ditch; T5N R35E S12SE 1/4
Clallam
Beaver Lake
Lake Sutherland
Pleasant Lake
Sutherland Lake
Clark
Battle Ground Lake, in Battle Ground State Park
Vancouver Lake
Coal Creek Road and Ocean Beach Hwy
Horseshoe Lake
Kress Lake
Sacajawea Lake
Silver Lake
Solo Slough, near Columbia River and Longview.
Willow Grove Slough, near Columbia River and Longview.
Blue Lake
Grays Harbor
Aberdeen Lake, just east of Aberdeen.
Duck Lake
Island
Goss Lake (Lake Goss).
Lone Lake
Leland Lake
Allen Lake
Beaver Lake No. 2
Burien Lake
Cottage Lake
Deep Lake
Fivemile Lake
Haller Lake
Lake Alice
Lake Desire
Lake Dolloff
Lake Fenwick
Lake Geneva
Lake Holm (Neilson Lake)
Lake Joy
Lake Kathleen
Lake Killarney
Lake Leota
Lake Marcel (Loop)
Lake Margaret
Lake McDonald
Lake Meridian
Lake Morton
Lake Number Twelve (Twelve Lake)
Lake Sammamish
Lake Sawyer
Langlois Lake
Lucerne/Pipe Lake
Montlake Fill (Montlake Cut?).
North Lake
Panther Lake, Kent and Renton area
Pipe Lake
Retreat Lake
Shadow Lake
Shady Lake
Spring (Otter) Lake
Star Lake
Steel Lake
Trout Lake
Vacant lot at 7100 Lake Washington Blvd NE, Renton.
Walker Lake
Wilderness Lake
Kitsap
Kitsap Lake
Long Lake
Mission Lake
Wildcat Lake
Kittitas
Ellensburg, about 1 mi south, barrow pit ponds on Howard Sevensen Ranch.
Kiwanis Pond
Mattoon Lake - S of Ellensburg and just N of Hwy 90
McCabe Pond (Unnamed pond: 17N-19E-31)
Wild Duck Lake
Lewis
Carlisle Lake
Mineral Lake
Onalaska, along Newaukum River bank
Franklin D Roosevelt Lake, in Lincoln County
Mason
Benson Lake
Fawn Lake
Isabella Lake
Island Lake
Lost Lake
Mason Lake
Nahwatzel Lake
Spencer Lake
Chopaka Lake
Osoyoos Lake
Loomis Lake
Pend Oreille
Davis Lake
Diamond Lake
Fan Lake
Pend Oreille River at Tiger Inlet
Sacheen Lake
Clear Lake
Harts Lake
Josephine Lake
Ohop Lake
Spanaway Lake
Tanwax Lake
San Juan
San Juan Island, Mill Pond (4.5 miles directly west of Friday Harbor).
Big Lake
Campbell Lake
Cavanaugh Lake
McMurray Lake
SE of La Conner, west of intersection of Rawlins and Maupin
Sixteen Lake
Skamania
Drano Lake
Blackmans Lake
Crystal Lake
Flowing Lake
Howard Lake
Ki Lake
Lake Goodwin
Lake Riley, south shore (Little Lake)
Lake Roesiger (north arm)
Lake Roesiger (south arm)
Martha Lake (27N-04E-01)
Private pond near Monroe, WA
Shoecraft Lake
Spokane
Eloika Lake
Long Lake (Reservoir)
Newman Lake
Stevens
Jumpoff Joe Lake
Lake Thomas
Loon Lake
Chambers Lake (big)
Hicks Lake
Woodland Creek, near railroad tracks
Columbia River at Cathlamet
Grays Bay, Columbia River - near east shore of Deep River mouth
Puget Island Sloughs
Walla Walla
College Place, along "C" St. 3/4 mi; T17N R35E S25SE 1/4
Whitman Mission Pond
Whatcom
Bug Lake (Heron Pond)
Cain Lake
Lake Fazon
Lake Samish (East Arm)
Lake Whatcom
Reed Lake
Squalicum Lake
Sunset Pond (Lake)
Tennant Lake
Toad Lake (Emerald Lake)
Yakima
Selah, east of Selah via Naches Ave, marsh-slough and ponds.
Yakima Elks Golf and Country Club, midway between Yakima and Selah, creek/ditch parallelling driveway.
Myriophyllum
spicatum
Eurasian water-milfoil
Columbia River, lower
aquaticum
parrot feather
Long Tom River at Monroe, Benton County, OR
Private farm pond, Reservoir Road off of 53rd St.
Slough along Willamette River, Near Pilkinston's
along U.S. 101 near Gearhart
Clatskanie Slough
Clatskanie Slough - Beaver Slough and Beaver Dredge Cut
Mongoose Lake, Coos Bay City Park (possibly Mingus Park Lake)
The Parrot Feather  is in one of the swales adjacent to the Optical Center parking lot, along Pony Creek in Coos Bay, Or
Crane Prairie Reservoir, near Crane Prairie campground
East Lake, a caldera on Mt. Newberry
Gilliam
Spur of the Columbia River on North Side of I-84
Lake
Fishhole Lakes
Heart Lake, Fremont National Forest
Lane
Across road from Autzen Stadium, Eugene
Along State Hwy 36 on the southern edge of Mapleton
Base of Mt. Pisgah, SE of Eugene
Clear Lake, just below Fern Ridge Dam
Coast Fork of Willamette River at Goshen, about 3 miles SE of Eugene
Constructed ponds south of Siltcoos River
Cottage Grove Reservoir, on the east side of the lake at Wilson Creek Park.
Dorena Reservoir, 7 miles east of Cottage Grove on Row River Road
Erhart Lake, East of Hwy 101 and approximately 2 miles south of Dunes City
Eugene [unidentified waterbody]
Eugene, between U.S. Highway 99W and Empire Park Road.
Fern Ridge Reservoir, Perkins Peninsula Park
Kirk Pond, borrow pit connected by pipe to north end Fern Ridge Reservoir.
Near Eugene, pond along road on the property of the Wildish Sand & Gravel Co.; along the Middle Fork of the Willamette River.
Park near Ferry St. Bridge, Eugene, north of Alton Baker Park
Pond near Goshen, between Franklin Boulevard and the Willamette River
Siltcoos Lagoons
heterophyllum
variable leaf water-milfoil
Siltcoos Lake, near boat launch
Sutton Lake, North of Florence, Oregon
Triangle Lake, 40 miles east of Florence on highway 36.
Unnamed lake - east side of dunes which border Heceta Beach and near N. jetty of the Siuslaw River.
Willamette River near Eugene
Woahink Lake - just north of Dunes City
Devils Lake
Devils Lake in Lincoln City
Toledo
W.B. Nelson State Park along State Hwy. 34 ca 2 miles E of Waldport
Yaquina River, along old road between Toledo and Newport
Freeway Lakes, 3 miles south of Albany
Groshong Lake, 3 miles E of Millersburg, 3 miles N of Albany
Morrow
Columbia River, Lake Umatilla, at Irrigon.
Blue Lake, 3 miles northwest of Troutdale
Columbia Slough, Portland
Sauvie Island, along land joining Oak and Sauvie Islands, in a branch of the Gilbert River
Downey Lake
Columbia River, mid channel east of Rowena.
Columbia River, north of Mayer State Park, Rowena.
Washington
Dorman Pond, NW of Forest Grove and W of Banks
Columbia River, in some portions.
Adams
Hutchinson lake
Morgan Lake
Thread Lake, 4 miles North of Othello
Asotin
Unnamed pond adjacent to Snake River [just W of Clarkston]
Columbia River, Hanford Reach, at East White Bluffs.
Columbia River, Hanford Reach, old Hanford town site backwater.
Columbia River, Lake Umatilla, NW of Crow Butte State Park.
Columbia River, Lake Umatilla, S. of Plymouth Park island.
Columbia River, Lake Wallula, near Hedges.
Columbia River, Lake Wallula, near Yakima River mouth and Bateman Island.
Cortez (Three) Lake
Domke Lake
Lake Chelan
Roses (Alkali) Lake
Wapato Lake, near boat launch and at the dock of private campground.
Unnamed (30N-04W-17)
Caterpillar Slough
Columbia River at Ridgefield
Snake River at Little Goose Dam
Snake River near Lyons Ferry.
Snake River, Lake Bryan, at Little Goose Dam.
Kress Lake, on the Kalama River
Big Bow Lake, near Rock Island
Pond at upper end of Jameson Lake.
Small lake ~12 mi W of Grand Coulee Dam on hwy 174.
Franklin
Columbia River, Hanford Reach, marsh SE across channel from Savage Island
Columbia River, Hanford Reach, southwest tip of Homestead Island.
Columbia River, near Pasco
Mesa Lake
Scooteney Reservoir
Snake River at Lyons Ferry.
Snake River, Lake Herbert G West, at Lyons Ferry State Park.
Snake River, Lake Sacajawea, by Big Flat Recreation Area
Snake River, Lake Sacajawea, pool at Levey
Snake River, Lake Wallula, .5 mile upriver from State Road 12.
Franklin_Walla Walla
Snake River, Lower Monumental Dam.
Franklin-Walla Walla
Snake River, Ice Harbor Dam
Garfield
Snake River, Lake Bryan, across river from Central Ferry State Park
Snake River, Lower Granite Reservoir
Babcock Ridge Lake
Banks Lake (Grand Coulee Reservoir)
Billy Clapp Lake
Burke Lake
Caliche Lake
Columbia River (Crescent Bar)
Columbia River, Hanford Reach, 1 mile NE of Wahluke.
Columbia River, Hanford Reach, mid channel off of SE tip of Barb Island.
Evergreen Lake (Reservoir)
Potholes Reservoir (Moses Lakes South)
Priest Rapids
Red Rock Lake
Stan Coffin Lake
Winchester Wasteway
Chehalis River [near South Elma]
Chehalis River, upstream of the Satsop River mouth.
Conner Creek
Grayland Ditch [in Grayland]
Deer Lagoon [S end of Whidbey Island]
Unnamed pond [on Camano Island]
Angle Lake
Bass Lake
Green Lake in Seattle
Lake Desire, along the southeast shoreline.
Lake Lucerne
Lake Union
Lake Washington
Otter Lake
Pipe Lake, near boat launch
Shady Lake, north shore.
unnamed pond in Bellevue
Walsh Lake
Fiorito Ponds
Lavender Lake
Lower Columbia near Vantage Washington
Private Pond (unnamed: 20N-16E-10)
Klickitat
Columbia River at Bingen
Columbia River at Maryhill
Columbia River, Lake Celilo,  north shore at Maryhill State Park.
Columbia River, Lake Celilo, north shore at Wishram.
Columbia River, Lake Umatilla, at John Day Dam.
Columbia River, Lake Umatilla, near Roosevelt.
Horsethief Lake
Chehalis River [in Chehalis]
Chehalis River, from Centralia (approx. 2.5 miles downstream of Borst Park) to the mouth in Grays Harbor.
Cowlitz River near Blue Creek
Interstate Avenue Sloughs [in Chehalis]
Mayfield Lake (Reservoir), southern half.
Riffe Lake
South County Lake, near Toledo
Swofford Pond
Lake, one mi NE of Sullivan Lake.
Pacific Lake
Conconully Lake
Conconully Reservoir
Concoy Lake, 7 sites thru shoreline
Concoy Reservoir, whole littoral
Palmer Lake
Rat Lake
Twin Lakes
Whitestone Lake
Black Lake
Long Beach Sloughs [near Long Beach]
Davis Lake; north end , boat launch
Little Spokane River
Marshall Lake
Nile Lake
Pend Oreille River
Pend Oreille River between Box Canyon Dam (rm 34.5) and Usk (rm 71.7).
Pend Oreille River, north of Ione
Trask Pond
Florence Lake
Hidden Lake (west of Lake Tapps)
Lake Tapps
slough, Port of Tacoma
Heart Lake, in the Cascades.
Lake Erie
Lake McMurray
Coldwater Lake.
a private pond [several miles NW of Sultan]
Lake Serene
Martha Lake, in Martha Lake.
Nina Lake
Nina Lake [N of Marysville]
Stevens Lake
Liberty Lake
Gillette Lake
Lake Heritage
McDowell Lake
Sherry Lake
Blue Lake, just south of Clear Lake
Capitol Lake, in Olympia
Scott Lake
Skiview Lake
Brooks Slough
Brooks Slough, under Highway 4
Columbia River at Skamakawa
Columbia River, Lake Wallula, near Two Rivers.
Snake River, Lower Monumental Dam
Unnamed pond (40N-2E-2)[~7 mi E of Blaine]
Whitman
Snake River at Central Ferry
Snake River at Lower Granite Dam
Snake River, Lake Herbert G West, at Riparia
Buena Creek
Buena Lake
Byron Ponds (Lake)
Dog Lake
I-82 Pond [near Buena]
I-82 ponds [near Zilah]
Parker Ponds (Unnamed:12N-19E-20)
Pond #1
Pond #3
Pond #4
Pond #5
Rotary (Freeway) Lake
Egeria
densa
Brazilian waterweed
12 miles south of Corvallis off Highway 99 W, on South Benton Grange Rd.
Lakeside - 1 mile west of, in a small stream W of Highway 101, where the railroad crosses the stream.
Elbow Lake, north of Reesport, west of Hwy. 101
Tahkenitch Lake, north of Reedsport, east of hwy 101
Mercer Lake, North of Florence, OR and East of Hwy 101
Siltcoos Lake, Millers Arm
Siltcoos Lake, south of Florence, east of hwy 101
Salem - fish pond
Klineline Lake, in Salmon Creek Park.
Lacamas Lake
Coweeman River
Unnamed pond (30N-03E-32), Whidbey Island
Chehalis River, upstream of Borst Park near Chelalis, WA
Plummer Lake
Lake Limerick
San Juan Island, near pond on Turn Point, near east shore of San Juan Island.
Swartz Lake
Chehalis River, South of the Olympic HWY
Unnamed pond (40N-1E-22) 4 miles SE of Blaine
Lythrum
salicaria
purple loosestrife
Coastal Oregon.
Northeastern Oregon.
Snake River
Columbia River at Astoria
Cheshire, approx. 5 airline miles NW of, along High Pass Rd, 5.2 miles W of its junction with the territorial HWY, in a creek; T15S, R6W, Sec. 35
Swan Island
Sherman
Columbia River, Lake Celilo
Columbia River, mid channel north of Mosier
Herman Lake
Columbia River, Hanford Reach, off northeast tip of Wooded Island.
Columbia River, Hanford Reach, just south of the Ringold River mouth.
Canal Lake
Corral Lake.
Frenchman Hills Lake; 1 shore site.
Quincy Lake
Rocky Ford Creek, tributary of Moses Lake.
Warden Lake
Lake Washington, near University of Washington.
University of Washington campus, Seattle.
Columbia River, at mouth of the Klickitat River, Lyle.
Trails End (Prickett Lake)
Pearrygin Lake
Bay Lake
Riley Lake
Waitts Lake
Columbia River at Skamokawa
Columbia River, Lake Wallula, just south of Wallula.
Snake River at Lower Monumental Dam - Walla Walla
Lake Terrell
Snake River, Lake Bryan, at Almota
Yakima River
Yakima River, from Selah to Yakima Arboretum
Yakima River, from Yakima Arboretum to Union Gap
Hydrilla
verticillata
hydrilla
Didymosphenia
geminata
Didymo
Little Camas Creek
Leland Creek
Middle Shaser Creek
Ingalls Creek
Mission Creek
Little Wenatchee River
Chatter Creek
Panther Creek
N Fk Skokomish River
Green River
Nooksack River
Dry Creek
Box Creek
North Fork Sauk River
Rushingwater Creek
LIttle North River
Coulee Creek
Sloan Creek
Suiattle River
War Creek
Methow River
Chewuch River
Chiwawa River
White River
Tahuya River
Wenatchee River
Duffy Creek
Umtanum Creek
Deschutes River
Union Flat Creek
Ferguson Creek
Drift Creek
Wrong Creek
Skokomish River
Johnny Creek
Snipes Creek
unnamed creek off Onion Creek
Powder River or Eagle Creek
Sand Canyon
Long Creek
Cecile Creek
Lake Creek
Mineral Creek
Lower Crab Creek
unnamed creek in Prosser
Snow Creek
Badger Creek
Sunnyside Canal
Fisher Creek
creek to Happy Lake
unnamed creek off Peshastin Creek
Palouse River
Crab Creek
Hewed Log Creek or Roba Creek
Rebel Flat Creek
Nez Perce Creek
Snahapish River
Desolution Creek or Sponge Creek or Howard Creek
Tamarix
ramosissima
Salt Cedar