Operational Plan for the Restoration of Diadromous Fishes to the ...

ecause there is little habitat of value for Atlantic salmon in the river. As the
restoration of diadromous fish species other than for Atlantic salmon progresses,
upstream passage facilities may need to be constructed at these projects to provide
passage into suitable habitat. Finally, the West Winterport Dam does have a Denil
fishway but it is currently inoperable due to wide fluctuations in headpond levels that
have occurred since the project’s license exemption was surrendered and the
project no longer generates hydro power. It should be noted that the project’s owner
is currently seeking to have the dam removed allowing the river reach affected by
the dam to return to natural conditions.
Table 9. Upstream and downstream fish passage facilities, Penobscot River (exclusive of the West
Branch, Penobscot River).
Upstream Passage Downstream Passage
Project Yes (Yr. Built) No Yes (Yr. Built) No
Veazie X (1970) 1 X 5
Great Works X (1968) 2
X 5
Milford X (1968) 2 X 5
West Enfield X (1988) 1
X (1988) 6
Mattaceunk X (1939) 3
Orono X X (2009) 6
Stillwater X X 5
Howland X (1965) 2 X 5
Brown’s Mill X (1973) 2 X 5
Moosehead X (1973) 2 X
Guilford X 1972) 2 X
Milo X X
Sebec X X
Lowell Tannery X (1985) 2 X (1985) 6
Matagamon X (1942) 4
Frankfort X (1982) 2 X
West Winterport X X
1 Vertical slot fishway
2 Denil fishway
3 Pool and weir fishway
4 Submerged orifice fishway
5 Hydro projects retrofitted with downstream passage facilities including guidance structures, fish behavior
technologies, and project operational measures
6 Dedicated downstream passage facilities constructed when hydro project was redeveloped
Four of the mainstem hydro projects have been retrofitted with downstream fish
passage facilities that consist of guidance structures, fish behavior technologies,
and/or project operational measures used singly or in combination to guide fish
around the projects (Table 9). The West Enfield Project has a dedicated
downstream fish passage system that was specifically constructed at the time the
project was redeveloped to pass diadromous fish around the project.
PRFP Page 50
X 5
X