Table 3. Landscape clusters for before and after-removal studies.

Cluster membership	Dam name and location
a (Mountain West)	Chiloquin, OR; Mystic, MT
b (West)	Edwards, ME; Gold Ray, OR; Milltown, MT; Savage Rapids, OR
c (Pacific Northwest)	Condit, WA; Dinner Creek, OR; Elwha, WA; Hemlock, WA; Marmot, OR
d (Arizona)	Fossil Creek, AZ
e (Upper Midwest)	Big Spring, WI; Boulder Creek (Lower & Upper), WI; Dexter, MI; Fort Covington, NY; Hinkletown, PA; LaValle, WI; Nashville, MI; Oak Street, WI; Rockdale, WI; Sandstone, MN; Shopiere, WI; Stronach, MI; Waterworks, WI; Woolen Mills, WI
f (New England)	Brownsville, OR; Franklin Mills, PA; Good Hope, PA; Hellberg’s, PA; Manatawny Creek, PA; McCormick-Saeltzer, CA; Merrimack Village, NH; Mill, NH; Pawtuxet Falls, RI; Shearer, OR; Simkins, MD; Sodom, OR; Woodside (I & II), SC; Woolen Mills, VA; Zemko, CT
g (Midwest)	Appleton, MN; Brewster Creek, IL; Embrey, VA; Fifth Avenue, OH; Main Street, OH; Munroe Falls, OH; North Avenue, WI; South Batavia, IL; St. John, OH
h (Southeast)	Carbonton, NC; Dead Lake, FL; Lowell, NC; Murphy Creek, CA
No cluster assigned due to missing landscape data	Central Avenue, OH; Homestead, NH; Off Billington Street, MA; Pelham, MA; Quaker Neck, NC; River Street, OH; Secor, OH

Significant clusters for before- and after-removal studies. Locations are indicated with abbreviations for states in the U.S. The cluster names in parentheses denote the region where a majority of the removals in each cluster were located.