Patent ID: 8430597

Claim:
A method of configuring an obstacle assembly for water flowing in a river channel made of a material having a base, a left wall and a right wall comprising: providing a plurality of strut channel rails attached to said river channel; providing a first obstacle comprising: a first hollow structural box; a first strut channel frame comprising a slotted face and an oppositely disposed web separated by a first leg and a second leg, said first strut channel frame web adjoining said first hollow structural box; and at least one first connector extending through said first hollow structural box and said first strut channel frame; attaching said first obstacle to one or more of said plurality of strut channel rails with said at least one first connector; and compressing said first hollow structural box between said first strut channel frame and said one or more of said plurality of strut channel rails using said at least one first connector; providing a second obstacle comprising: a second hollow structural box; a second strut channel frame comprising a slotted face and an oppositely disposed web separated by a first leg and a second leg, said first strut channel frame web adjoining said second hollow structural box; and at least one second connector extending through said second hollow structural box and said second strut channel frame; attaching said second obstacle to said first obstacle with said at least one second connector; and compressing said second hollow structural box between said first strut channel frame and said second strut channel frame.