Before the commencement of the Hudson Street Gully erosion control works there were two waterfalls and a 58–m long culvert on the Hudson Street Gully Stream. The works have replaced the 3-m waterfall at the confluence of the stream with the Waikato River with a 75-m concrete pipe culvert with a fall of 3.45 m, and a 10-m long culvert between the new, 75-m long culvert and the original culvert. The 2.6-m waterfall with its overhanging lip that is 9 m upstream of the original Hudson Street Gully culvert remains unaltered.