The arm is known as the Bincleaves Groyne. Groyne construction creates a problem known as terminal groyne syndrome. However, this can cause severe erosion on shorelines downstream from the groyne. The "structural" alternative involves constructing a seawall, revetment, groyne or breakwater. Beach replenishment and groyne replanking would continue at intervals. The first section, which ran from Fort Groyne to Round House was completed by 1860. The areas between groups of groynes are groyne fields. The terminal groyne prevents longshore drift from bringing material to other nearby places. As a solution the Herd Groyne Pier was erected in 1882. Examples occur at Ocean Beach New York, and Duranbah Groyne New South Wales.