Low Impact Certification means that the hydropower facility has been found by the Institute to meet or exceed the Institute’s Certification Criteria which address eight key areas: ecological flow regimes, water quality, upstream fish passage, downstream fish passage and protection, shoreline and watershed protection, threatened and endangered species protection, cultural and historic resource protection and recreational resources. Certification is designed to provide consumers with assurance that a facility has avoided or reduced their environmental impacts pursuant to the Low Impact Hydropower Institute’s criteria. Once certified, the owner or operator can market the power from the facility to consumers as produced by a LIHI certified Facility. Certification from the Institute may also qualify the power produced for other “green” energy certification programs.

US Facilities Map
Green and Red dots The following hydropower facilities have been certified by the
Low Impact Hydropower Institute and assigned a LIHI Certificate
Number (click on the links to learn more about each project):


Certified Facilities:

Cert No. Project Name River State(s)
136 New Home Dam Millers River Massachusetts
 135 Ladd’s Mill Winooski River Vermont
 134 Vergennes Otter Creek Vermont
 133 Byron Weston Housatonic Massachusetts
 132 Dog River Dog River Vermont
 131 Chester Diversion Snake River Idaho
 130 Chicopee Valley Aqueduct (CVA) Chicopee River Massachusetts
 129 North Gorham Presumpscot River Maine
 128 Otter Creek Otter Creek Vermont
 127 Crocker Dam Whitman River Massachusetts
 126 York Haven Susquehanna River Pennsylvania
 125 Hunts Pond Dam Millers River Massachusetts
 124 Comtu Falls Black River Vermont
 123 Stevens Mill Winnipesaukee River New Hampshire
 122 Downer’s Mills Ottauquechee River Vermont
 121 Lawrence Merrimack River Massachusetts
120 Gregg’s Falls Piscataquaog River New Hampshire
119 Crescent Westfield Rivers Massachusetts
 118 Webster Pembroke Suncook River New Hampshire
 117 Clement Winnipesaukee River New Hampshire
 116 Holtwood Lower Susquehanna River Pennsylvania
 115 Glendale Housatonic River Massachusetts
 114 Mahoning Creek Mahoning Creek Pennsylvania
 113 Milford Penobscot River Maine
 112 Indian Orchard Chicopee River Massachusetts
 111 Methuen Falls Spicket River Massachusetts
110 Stillwater Powerhouse B
(combined with #67)
Penobscot River Maine
 109 Prospect No. 3 Rogue River Oregon
 108 Gilman Connecticut River Vermont
 107 Carver Falls Poultney River Vermont
 106 Greenville Shetucket River Connecticut
105 Occum Shetucket River Connecticut
104 Rolfe Canal Contoocook River New Hampshire
 102 Putts Bridge Chicopee River Massachusetts
101 Culinary Water System Swift Creek Wyoming
 100 South Milton Salmon Falls River New Hampshire
99 Middlebury Lower Otter Creek Vermont
 98 Weybridge Otter Creek Vermont
 97 Cavendish Black River Vermont
 96 Red Bridge Chicopee River Massachusetts
95 Passumpsic River Passumpsic River Vermont
 94 Gage Passumpsic River Vermont
 93 Arnold Falls Passumpsic River Vermont
 92 Pierce Mills Passumpsic River Vermont
 91 Silver Lake Sucker Brook River Vermont
 90 Deerfield River Deerfield Massachusetts/Vermont
 89 Holyoke Connecticut River Massachusetts
88 Collins Chicopee River Massachusetts
 87 Cresticon Millers River Massachusetts
 86 Open Square Connecticut River Massachusetts
 85 Martinsville Lulls Brook Vermont
 84 Vine Street South Santiam River Oregon
 82 Newfound Newfound River New Hampshire
80 Gardners Falls Deerfield River Massachusetts
 79 Benton Falls Sebasticook River Maine
 78 Slack Dam Slack Dam Vermont
 77 Winooski 8 Winooski River Vermont
 76 West Dudley Quinepaug River Massachusetts
 75 Henry M. Jackson Sultan River Washington
 74 Mechanicsville French Connecticut
73 Siphon Power Deschutes River Oregon
 72 Automatic Messalonskee Stream Maine
 71 Dalles Dam North Fishway Dalles Dam Washington
 69 North Umpqua North Umpqua River Oregon
 68 Woronoco Westfield Rivers Massachusetts
 67 Stillwater Penobscot River Maine
 66 Orono Penobscot River Maine
 65 Medway Penobscot River Maine
64 Penacook Lower Contoocook River New Hampshire
 63 School Street Mohawk River New York
 62 Cutler Bear River Basin Utah
 61 Ashton Snake River Idaho
60 Oakland Kennebec River Maine
 59 Rice Rips Messalonskee Stream Maine
 58 Union Gas Messalonskee Stream Maine
 57 Oakdale Wachusett Reservoir Massachusetts
 56 Loring Road Long Road Covered Storage Facility Massachusetts
 55 Cosgrove Long Road Covered Storage Facility Massachusetts
54 Jackson Mills Nashua River New Hampshire
 53 Bear River Bear River Basin Idaho
 52 Penacook Upper Contoocook River New Hampshire
 51 Arkansas River Dam No.2 Arkansas River Arkansas
 50 Alternatives Mumford River Massachusetts
 48 Androscoggin Adroscoggin River Maine
 47 Ware River Ware River Massachusetts
 46 Ashuelot & Lower Robertson Ashuelot River New Hampshire
 45 Farmers Irrigation District Hood River Oregon
44 Ice House Nashua River Massachusetts
43 Deer Island Boston Harbor Massachusetts
 42 Dodge Falls Connecticut River Vermont
 40 Vernon Connecticut River Vermont
 39 15-Mile Falls Connecticut River New Hampshire
 38 Rumford Falls Androscoggin River Maine
 37 Kingsley Dam Platte River Nebraska
 35A Oswego Falls Oswego River New York
 35B Oswego River Oswego River New York
 34 Black River and Beebee Island Black River New York
 33 Willamette Falls Willamette River Oregon
 32 Newton Falls Oswegatchie River New York
 31 Boulder Creek Boulder CreeChelan River Montana
 30 Lake Chelan Chelan River Washington
 29 Jordanelle Provo River Utah
 27 West Branch St. Regis Saranac Lake New York
 26 Goat Lake Goat Lake Alaska
25 Pelton Round Butte Deschutes River Oregon
24 Mother Ann Lee Kentucky River Kentucky
 23 Raystown Juniata River Pennsylvania
 22 Black Bear Lake Black Bear River Alaska
 21 Buffalo River Buffalo River Idaho
 20 Salmon River Westfield River New York
19 West Springfield Westfield River Massachusetts
 18 Smoky Mountain Little Tennessee and Cheoah Rivers North Carolina
 17 Summersville Gauley River West Virginia
 16 Winooski One Winooski River Vermont
 15 Bowersock Mills Kansas River Kansas
 14C Lower Raquette River Raquette River New York
14B Middle Raquette River Raquette River New York
 14A Upper Raquette River Raquette River New York
 13 Hoosic River Hoosic River New York
 12 Tallassee Shoals Middle Oconee River Georgia
 11 Pawtucket Blackstone River Rhode Island
 10 Worumbo Androscoggin River Maine
 9 Strawberry Creek Strawberry Creek Wyoming
 8 Nisqually Nisqually River Washington
 7 Beaver River Beaver River New York
 6 Black Creek Black Creek Washington
5 Skagit Skagit River Washington
4 Falls Creek Falls Creek Oregon
3 Putnam Quinepaug River Connecticut

Applications Under Review:

Cert No. Project Name River State Date of Comment Closing
98 Weybridge Otter Creek VT  December 26, 2017
100 South Milton Salmon Falls River NH  December 26, 2017
N/A Brooklyn Dam Upper Ammonoosuc River NH December 26, 2017
33 Willamette Falls  Willamette River OR November 26, 2017
N/A Lowell Merrimack River MA November 22, 2017
N/A Little Falls Presumpscot River ME November 7, 2017
N/A Mallison Presumpscot River ME  November 7, 2017
N/A Gambo Presumpscot River ME  November 7, 2017
N/A Dundee Presumpscot River ME  November 7, 2017
N/A Eel Weir Presumpscot River ME  November 7, 2017
104 Rolfe Canal Contoocook River NH October 31, 2017
5 Skagit River Skagit River Basin WA September 26, 2017
87 Cresticon Millers River MA September 10, 2017
N/A Willow Island Ohio River OH September 6, 2017
80 Gardners Falls Deerfield River MA August 13, 2017
97 Cavendish Connecticut River VT July 22, 2017
99 Middlebury Lower Otter Creek VT July 17, 2017
N/A Essex 19 Winooski River VT March 6, 2017
2 Island Park Snake River ID March 6, 2017
92 Pierce Mills Pierce Mills VT March 6, 2017
93 Arnold Falls Pierce Mills VT March 6, 2017
94 Gage Arnold Falls VT March 6, 2017