Project Twin Streams Cycleways
- $8m capital works
- 12km of new walk and cycleways
- 5 bridges, 11 boardwalks and 3 rail underpasses
- Improved stream ecology and water quality
- Installation of art, cultural and sustainable technologies
Project Twin Streams was an initiative of the Waitakere City Council (WCC) in Auckland to restore the riparian margins and improve the stream ecology and water quality along the Oratia Stream (including the Waikumete Stream), the Opanuku Stream, the Swanson Stream and the Henderson Creek. The $8m project was launched in October 2001 in partnership with LandCare Research, and included the construction of 12 kilometres of mostly off-road cycleways along stream corridors that underwent restoration as part of the Twin Streams project. The routes followed three streams and required the full purchase, or parts of, 200 residential properties, along with associated property negotiation, rezoning, consenting, and house removal activities.
Synergine was engaged on the project early in its inception, including the initial programming and Programme Management of the project and to support the preparation of a Business Plan. Synergine further provided project management services over aspects of the programme, including the Waikumete and Oratia sections of the cycleway. This included responsibility for managing consultations within WCC, consultations with external stakeholders, and managing the resource consent application process.
Detailed Engineering Design
During the engineering design phases Synergine was engaged to design 3 sections of the cycleway – the 1.6km Oratia, the 0.6km Lower Waikumete, and the 0.75km Upper Waikumete Walk and Cycleways. These projects included the delivery of engineering concept designs submitted for consultation internally within WCC and externally with the wider public, exploration into alternative engineering design options as a result of consultation, and ultimately the delivery of detailed engineering design for construction.
Detailed design proceeded in close collaboration with WCC and also included liaison and incorporation of town planning, arborist reporting, safety audits, flooding reporting issues, geotechnical investigation and reporting, construction drawings with alignments and cut & fill layouts, long-section profiles, wooden boardwalks with handrails and ramps, markings, signage and furniture designs and layouts. Associated works included design of a wetland to manage stormwater flows adjacent to the Lower Waikumete cycleway, and the coordination of the Oratia Cycleway design with the construction of two pedestrian/cycleway bridges and the railway underpass at Sunnyvale Station.
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