Costa Beck
It is a tributary of the River Rye which joins the River Derwent , eventually flowing into the River Ouse at Barmby on the Marsh . 
<triplet> River Rye <subj> River Derwent <obj> mouth of the watercourse <triplet> River Derwent <subj> River Rye <obj> tributary <subj> River Ouse <obj> mouth of the watercourse