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Scheduled Drains layer from First Schedule
Overland Flow Paths layer
Albert Town Defences Against Water
Lower Taieri (Upper Pond) Access track
Leith Lindsay defences against water. Includes the bed of the Water of Leith and Lindsay Creek.
Henley Floodbank
Floodbanks layer
Excavation Sensitive Areas
The Hilderthorpe Floodway is a channel, both natural and artificially constructed, designed to convey overland flow from Gray Road to the Hilderthorpe Race alongside Steward Road during significant rainfall events. This floodway is not part of a wider flood protection scheme. The natural sections of the channel follow the course of a paleochannel.
The Hendersons and Waikoura Creeks floodway consists of artificially constructed channels designed to collect flood flows on the north-eastern side of Georgetown Pukeuri Road (SH83) and convey them to the Waitaki River during significant rainfall events. This floodway is not part of a wider flood protection scheme.
The floodway starts at the artificially constructed sections of the creeks and join at Irvine Road where combined, they follow Irvine Road for approximately 800 metres then follow Jardine Road for about 2,500 metres before entering the Waitaki River through a drop structure.
The Taieri River Floodway defines the area of river berm between Allanton and the Waipori River confluence that assists with the conveyance of flood flows. The true left extent of the floodway between Allanton and the Waipori River confluence is defined 26 Flood Protection Management Bylaw, [date] 20122 by higher ground (lower than the opposite bank floodbank crest level). The true right side of the river from Otokia to the Waipori River confluence is defined by floodbanks or elevated sections of State Highway 1 (locally known as the “Flood Free Highway”).
Two uncontrolled spillways are located on the Contour Channel left bank, one just upstream of Miller Road and one immediately downstream of Otokia Road. These spillways consist of a lowered (relative to adjoining sections) section of Contour Channel floodbank. Thus when the water level in the Contour Channel reaches the spillway crest level, spill will begin automatically. The spilled water occupies the floodways before reaching the old course of Lee Creek (now a scheduled drain). This water eventually reaches the Waipori pump station and is discharged into Lake Waipori.
Two uncontrolled spillways are located on the Contour Channel left bank, one just upstream of Miller Road and one immediately downstream of Otokia Road. These spillways consist of a lowered (relative to adjoining sections) section of Contour Channel floodbank. Thus when the water level in the Contour Channel reaches the spillway crest level, spill will begin automatically. The spilled water occupies the floodways before reaching the old course of Lee Creek (now a scheduled drain). This water eventually reaches the Waipori pump station and is discharged into Lake Waipori.
This channel provides flood relief to Balclutha, shortening the flow path of the Koau branch between the Bifurcation (point at which the Clutha splits into the Koau and Matau branches) and Finegand. It runs in a SSE direction, is approximately 500 m wide and 1.9 km long. The floodway is grass-lined (pastoral farmland when not in operation) with floodbanks on either side and a lower height sill at the bottom end (to prevent the bottom end being drowned in river flows less than the operating threshold).
Although not physically delineated, this floodway encompasses an area adjacent to the Silver Stream (Gordon Road) Spillway. This floodway conveys flow spilled from the Silver Stream which eventually discharges to the Upper Ponding Area via gated culverts through the cutoff bank.
The Silver Stream (Gordon Road) Spillway is a lowered section (approximately 1km long) of the true right Silver Stream floodbank between Gordon Road and Riccarton Road. This section is a design feature of the Lower Taieri Flood Protection Scheme. It is designed to mitigate the flood risk for Mosgiel (protected by the true left floodbank) by allowing spilling over the true right floodbank.
Flood protection vegetation means all trees and shrubs, including those deliberately planted, or self-seeded, owned or controlled by Council for flood or erosion protection purposes occurring between the ‘Flood protection vegetation’ lines in the Fourth Schedule. Where only one ‘flood protection vegetation’ line is shown, the area of vegetation to be managed for flood protection will be the area between the line and the adjacent edge of the active channel in the Fourth Schedule.
Lower Waitaki River Groynes
Cross-banks layer from the Bylaw Fourth Schedule
Shotover River Training Line
Flood protection vegetation means all trees and shrubs, including those deliberately planted, or self-seeded, owned or controlled by Council for flood or erosion protection purposes occurring between the ‘Flood protection vegetation’ lines in the Fourth Schedule. Where only one ‘flood protection vegetation’ line is shown, the area of vegetation to be managed for flood protection will be the area between the line and the adjacent edge of the active channel in the Fourth Schedule.