Redhills Wastewater Infrastructure Scheme
Client
Watercare Services Ltd
Client Project Manager
Jason Salmon
Engineer to the Contract
David Moore
Engineer’s Representative
John McCann
Principal’s Engineering Advisor
Harrison Grierson
Contractor’s Designer
GHD
Andy O’Sullivan & Associates
Description
The objective was to deliver a new wastewater scheme to service the Redhills SHA. The project was delivered as a Design and Construct contract under NZS3916:2013.
The scheme included:
- A branch sewer in the Redhills valley – 1800m of sewer ranging from 300NB to 750NB
- A 141l/s pump station with underground storage tanks
- A 700m long 355OD HDPE rising main, discharging at the high point at Northside Drive.
- A 1400m long gravity sewer (400OD/450OD HDPE)
- A connection to the existing Massey North DPS069 pump station on Northside Drive
Expertise
- Design and consenting
- deep open cut installation of RCRRJ sewers
- installation of gravity HDPE sewers by HDD to grades as low as 0.5%
- installation of buttwelded HDPE rising mains
- traffic control,
- slope stabilisation
- deep shafts
- microtunnelling,
- road construction
- electrical and mechanical works
Highlights
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- Shafts at Bill McKinley Park
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- Pick Jacking at Bill McKinley Park
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- Line Valve Shaft at Millen Ave
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- Shaft Construction at Bill McKinley Park
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- Cut in to Eastern Interceptor Sewer
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- Pakuranga Road Trenching
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- In trench butt welding 900OD HDPE pipe
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- In trench butt welding mitred bend
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- Pakuranga Rd Directional Drill Pullback
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- Pakuranga Rd Directional Drill Pullback
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- Pakuranga Rd Directional Drill Pullback