Hammerhill Bridge, over the River Ouse,... (C) Pete Chapman On the higher (northern) stretch of the Sussex River Ouse (which flows through Lewes and joins the sea at the port of Newhaven). The B2114 between Staplefield and Cuckfield crosses over the bridge. The bridge itself is barely noticeable to the traffic which speeds across it (as shown in the picture!). View taken of the W (upstream) side of the bridge.