Central Motorway Junction

Eco Maintenance Case Study

In late 2002, Eco Maintenance was successful in tendering for the landscaping on the Central Motorway Junction stages 1 & 2. The Central Motorway Junction project involved the widening of Spaghetti Junction and the joining up of the existing north west, northern and southern motorways with a new entry and exit through the Grafton Gulley. Our part of the project involved the removal of all noxious and unwanted scrubs and trees from the new Grafton Gulley section through to the motorway junction with Gillies Avenue. Once the unwanted plants were removed we spread mulch and then during the planting seasons planted the plants.

The project management was a consortium of three companies, Fletcher Construction Limited, Beca Carter and Higgins Contractors Ltd under the name of the freeflow Alliance. This was the then relatively new method of alliancing contract for projects of this size although Eco Maintenance had been working with Auckland City Council under the same philosophy for five years. The rationale behind the alliance was that all three major parties would band together and ensure a successful outcome especially regarding budgets and timeframes. In the end the project came within budget and time and the consortium shared a percentage of the budget saving with Transit New Zealand.

The project ran for two years with the site preparation and mulching being carried out when each section of road was completed and the planting being carried out during the two planting seasons available. The numbers on this project were mind blowing, plants all native and locally eco sourced numbered in excess of 150,000. Altogether some 3500 cubic metres of mulch was transported from Tuakau to the site and spread at a depth of 100mm.

The contract specifications called for cadmium mulch to be used but on our recommendation the clients allowed us to use pine peelings as the planting areas were very steep and cadmium mulch would have been susceptible to slippage and this is not a good look on the side of the motorway. The pine peelings have stood up well and there has not been one slip since installation. Their helical shape means they bind with one another and prevent slippage.

Working on and above a motorway still in use presented us with major health and safety issues but our exceptional Health & Safety management systems ensured that not even one minor incident occurred.

This was a very challenging project. The size, health & safety and project management all contributed to one of the largest and most complicated landscaping project of its time. Eco Maintenance excelled in all aspects of this project, finishing to schedule and within budget.

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Central Motorway Junction
Central Motorway Junction
Central Motorway Junction
Central Motorway Junction
Central Motorway Junction
Central Motorway Junction
Central Motorway Junction
Central Motorway Junction
Central Motorway Junction
Central Motorway Junction
Central Motorway Junction
Central Motorway Junction
 

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