ANOTHER METHOD: It is to make a notch on a lumber or any piece of wood which would stick out of the water in a frozen river and then you put your trap on it.
(It; is; to make a notch on a lumber or any piece of wood) (wood; would stick; L:in a frozen river) (you; put; your trap; on it; T:then)
It wood you
is would stick put
to make a notch on a lumber or any piece of wood
L:in a frozen river
your trap on it T:then