Home → Science and Research → Sea-Run → Trap Counts
Trap Count Statistics
Introduction
These data are compiled by the Department of Marine Resources (DMR) using fishway counts provided by agencies, power companies, and a harvester. "NC" indicates a species is not counted at that location. Fish returns should be considered as provisional.
These fish counting facilities are typically operated from May through early November each year. Staff update the statewide trap catch summary weekly or more often during the peak of the fish migrations. The statewide trap catch table includes counts of sea-run salmon captured on Maine rivers and salmon removed from the river as broodstock for restocking of Maine rivers and DOES NOT include captures of aquaculture strays or captive reared adult salmon released from Federal hatcheries.
| River | Trap Location | Am.Shad |
At.Salmon (MSW) |
At.Salmon (grilse) |
River Herring |
Striped Bass |
Sea Lamprey |
Trap Opened |
Trap Closed |
Updated |
|---|---|---|---|---|---|---|---|---|---|---|
| Androscoggin | Brunswick | 32 |
1 |
0 |
179075 |
5 |
30 |
April 23 |
November 1 |
November 4, 2018 |
| Aroostook | Tinker Dam | NC |
39 |
0 |
NC |
NC |
NC |
July 3 |
November 9 |
November 9, 2018 |
| Kennebec | Benton Falls | 8 |
0 |
0 |
3,350,000 |
0 |
3 |
May 1 |
May 25, 2018 | |
| Kennebec | Lockwood Dam | 401 |
8 |
3 |
300390 |
102 |
8 |
May 9 |
October 31 |
November 4, 2018 |
| Narraguagus | Cherryfield | 608 |
20 |
22 |
NC |
0 |
0 |
May 1 |
October 26 |
October 26, 2018 |
| Penobscot | Milford fish lift | 3923 |
467 |
288 |
2174688 |
762 |
1976 |
April 19 |
November 15 |
November 12, 2018 |
| Penobscot | Orono | 6 |
13 |
1 |
93939 |
0 |
251 |
April 15 |
November 15 |
November 12, 2018 |
| Penobscot | Weldon Dam | 0 |
6 |
10 |
0 |
0 |
NC |
May 1 |
November 12 |
November 12, 2018 |
| Saco | Cataract (East + West Channels) | 3985 |
2 |
1 |
86512 |
479 |
0 |
May 1 |
October 1, 2018 | |
| Saco | Skelton | 93 |
0 |
0 |
44424 |
0 |
0 |
May 1 |
October 1, 2018 | |
| St. Croix | Milltown Dam | 255 |
0 |
0 |
270659 |
0 |
0 |
April 26 |
July 18, 2018 | |
| Union | Ellsworth | 0 |
0 |
0 |
622829 |
0 |
0 |
May 3 |
November 1 |
November 12, 2018 |
Atlantic salmon MSW = multi sea winter (≥ 63 cm fork length);
grilse = one sea winter (< 63 cm fork length)
River herring counts = combined count of alewife and blueback herring
| River | Trap Location | Sources and Details |
|---|---|---|
| Androscoggin | Brunswick | Counts conducted by DMR and Brookfield Renewable Energy Group. |
| Aroostook | Tinker Dam | Counts provided by Algonquin Power. |
| Kennebec | Benton Falls | Counts conducted by DMR. |
| Kennebec | Lockwood Dam | Counts provided by Brookfield Renewable Energy Group. |
| Narraguagus | Cherryfield | River herring and small bodied(<40 cm in total length) American shad are able to escape the Narraguagus trap. |
| Penobscot | Milford fish lift | Counts provided by Brookfield Renewable Energy Group. |
| Penobscot | Orono | Counts provided by Brookfield Renewable Energy Group. |
| Penobscot | Weldon Dam | Counts provided by Brookfield Renewable Energy Group. River herring were documented in the fishway, but no counts are provided. |
| Saco | Cataract (East + West Channels) | Counts provided by Brookfield Renewable Energy Group. West Channel:18,434 river herring & 571 American shad |
| Saco | Skelton | Counts provided by Brookfield Renewable Energy Group. |
| St. Croix | Milltown Dam | Counts provided by St. Croix International Waterway Commission. |
| Union | Ellsworth | Counts provided by Brookfield Renewable Energy Group. |
