Products Offered By Milieu:
Eel Ladders
MILIEU designs and fabricates complete
eel ladders for small- to medium-sized Dams and Hydroelectric Projects. MILIEU's design is recognized as one of the
most reliable and efficient in North America.
The eel ladders designed by MILIEU consist of an aluminum trough which holds and supports the plastic climbing ramp.
The trough is equiped with hinged covers that provides a dark environment to encourage migration. MILIEU's exclusive photoelectric eel counter can be included in the design of the eel ladder, offering a reliable and
simple method of counting the number of eels transiting the eel ladder.
MILIEU has designed and fabricated numerous eel ladder, for example:
One eel ladder for the Luray Hydroelectric Station in Virginia, U.S.A.
One eel ladder for the High Dam in New York State, U.S.A.
Two eel ladders on the Raquette River for Norwood and Norfolk Hydroelectric Stations in New York State, U.S.A.
Three eel ladders on the Raquette River for the Raymondville, East Norfolk and Yaleville Dams in New York State, U.S.A.
Three eel ladders on the Oswego River for the Minetto, Fulton, and Oswego Falls Dams in New York State, U.S.A.
One eel ladder for the Warren Dam in West Virginia, U.S.A.
One eel ladder for the Millville Dam in West Virginia, U.S.A.
One eel ladder at the Chambly Dam in Québec, Canada
One eel ladder at the St. Ours Dam in Québec, Canada
For larger Hydroelectric Projects, we offer our design expertise and collaborate closely with engineers to provide the best eel-passage facility. We provided our consulting services
to the New York Power Authority at the St. Lawrence-FRD Power Project and to Hydro-Quebec at Beauharnois Dam.
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Climbing Ramp for Juvenile Eels
MILIEU manufactures a subtrate made of
plastic studs for eel ladders and eel traps. The climbing ramp is molded in ABS plastic and it has a series of staggered studs that the eels push against as they climb the eel ladder or eel trap.
The sides of the ramp are also undulating which facilitate upward movements of eels.
The modular ascending ramp targets the passage of
juvenile eels that measure between 150 mm and 800 mm. With
this module, eels can climb a trap or a ladder installed at an angle
of up to 55o. This ramp has been extensively
tested since 1998 and has been shown to be very efficient.
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Climbing Ramp for Elvers
More recently, MILIEU developped a climbing ramp for eels smaller than 150 mm.
The product is molded in ABS plastic and it has a series of staggered studs that the eels push against as they climb the eel ladder or eel trap.
The sides of the ramp are also undulating which facilitate upward movements of eels.
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Elvers in action!
Our elver substrate is presently installed at the Roanoke Rapids Power Station and Dam.
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Photoelectric Eel Counter - ANGEEL
MILIEU has designed and fabricated a photoelectric eel counter for juvenile
eels (> 150 mm). It was designed to count eels as they exit a pipe, particularly at the exit of an eel ladder or an eel trap.
The operation of the counter is based on the use of a beam of modulated infrared light sent out continuously in front of a conduit
where eels are lead to pass.
MILIEU is the sole manufacturer of this photoelectric counter.
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