Wairau/Awatere Resource Management Plan 5.12.2 New Works Required • To reconstruct weak parts of the eastern stopbank beside the spillway. • Enlarge Pukaka outlet culvert. 5.13 Gibsons Creek 5.13.1 Design Intentions 5.13.1.1 To maintain the Gibsons Creek channels to carry water abstracted from the Waihopai so as to recharge the aquifer downstream of Renwick. 5.13.1.2 To improve the hydraulic efficiency of Gibsons Creek through Renwick to prevent breakout of floods in a 1 in a 100 year return period flood. 5.13.1.3 To reduce flood levels in Gibsons Creek to enable good outflow in flood conditions for School Creek and Terrace Creek. 5.13.1.4 Investigate the use of the Earthquake Swamp as a controlled detention area. 5.13.2 New Works Required • Enlargement of the channel to 8 metres width so as to restore it to its previous size. • Clearing willow trees and other obstructions from this channel. 5.14 Small Urban Rivers (This includes Opawa Loop, Fultons Creek, Murphys Creek in Blenheim; School Creek and Terrace Creek, Renwick). New works on these rivers will be subject to consultation with affected urban residents and specific resource consent to carry out the works. 5.15 Small Rural Rivers and Drainage Channels 5.15.1 Design Intentions 5.15.1.1 To maintain drainage channels in a hydraulically efficient state by regular removal of deposited sediment and weed growth. 5.15.1.2 To maintain the 305 floodgated outlet structures into the major rivers that prevent the backflow of river floodwater. 5.15.1.3 To maintain and enlarge the pumping stations that supplement the gravity outfalls. 5.15.2 Proposed Works • The enlargement of 25 pumping stations as follows: App F - 8