Numbers of Manx salmon could soon be on the increase, following the construction of a bypass to a three metre high weir.
The departments of fisheries and transport have built a series of steps in the Santon Burn, to allow the fish, and trout, to travel further upstream.
DAFF has been monitoring the river for five years, and will be able to tell in the summer how successful the project has been.
Spokesman John Ballard says good numbers of salmon are the sign of a healthy river:
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