Waipaoa Stopbank Flood Protection Enhancement Project
The aim of this project is to increase the level of flood protection provided by the Waipaoa stopbanks up to a 100 year return period accounting for climate change effects out to 2090. Simply put bulk earthworks are required to raise and widen the existing Waipaoa stopbanks to improve their resilience against flood eve…
Source ID: NZ-GETS-22500736
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As published by the source; may be updated by the buyer.
Scope overview
The aim of this project is to increase the level of flood protection provided by the Waipaoa stopbanks up to a 100 year return period accounting for climate change effects out to 2090. Simply put bulk earthworks are required to raise and widen the existing Waipaoa stopbanks to improve their resilience against flood events.
One large diameter concrete culvert (1.8m dia) and the associated floodgate and inlet structures also needs to be renewed as part of the stopbank improvement work. The proposed work is located approximately between the Waipaoa Rivermouth and the KiwiRail Railway Bridge (eastern side of Waipaoa River), following approximately 1.8km of existing stopbank.
The soil material for this work will be sourced from Council owned berm land located on the river side of the stopbanks. The designated borrow area is located at the upstream end of the project. The soil volumes required to be compacted in place for this contract is estimated to be around 22,900 m3. The Contract Works Period to complete the work is 12 weeks.
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