February 2018 – April 2018
Installation of storm water drainage at the new Links Road roundabout including concrete culvert pipes, wing walls, sumps and manholes from 225mm up to 1350mm.
Pressure from the public and the main client to minimise hold ups on the Hawke’s Bay motorway made this a challenging drainage project that was made even more challenging by a week of very ordinary weather. At 1350mm in diameter, these were some of the largest pipes we have worked with, requiring different methods for setting them in place and connecting together.
Having the right equipment on hand helped us stay ahead of the programme from the start. We finished ahead of time, passing all our inspections and pressure tests with flying colours.
March – July 2018
Replacing the original 225mm concrete sewer with a new 300mm PVC main at 3.5m deep running down the middle of St Aubyns Street, Hastings.
Replacing the sewer main on one of the busiest roads in Hastings calls for next level traffic management, health and safety assurances, management of the constant comings and goings of personnel, trucks and other machinery, and keeping homeowners living on St Aubyns and surrounding streets happy by minimising noise, dirt and disruption.
The upgrade to the main sewer pipe involved the removal of the old pre-cast concrete manhole covers, each weighing 8 tons, and replacing them with plastic Romold manholes. Each lateral had to be replaced from the main to the boundary with new access boxes called ‘rodding eyes’. The sewer remained live throughout the job, which meant over-pumping from manhole to manhole.
Avoiding damage to the myriad of other services (gas, power, water, communications) running along and across St Aubyns Street was made easier by the arrival of our new hydro vac truck, Big Red – which enabled us to clear the way around these vital services with no disruption to residents.
July – October 2018
Installation of new sewer and water infrastructure at the new West Place subdivision in Greenmeadows, Napier
It’s fair to say that the installation of new sewer and water infrastructure at the new
West Place subdivision in Greenmeadows, Napier, threw up a few surprises for the Drainways team.
First up was the discovery of existing services that were not on the plans. Avoiding a clash between these and the new services meant plans had to be amended, the new services redesigned, and parts of the job re-priced. Drainways assisted council with a number of ideas throughout the rethinking process, including a purpose-designed bypass manhole.
An old leaking water main that had soaked the ground from 100mm below the surface caused the trench to collapse in the midst of installing a 450mm concrete water pipe. After excavating a wider trench and using pumps to move excess water, the team worked quickly to install the new pipes and complete the job ahead of further slumping in the trench.
A very tight right of way close to an existing fence allowed no swing area for our excavators and there was a real possibility the fence would collapse. Using a 13 tonne zero swing excavator and a smaller 5 tonne machine, our boys dug the trench and put in a massive effort to install 70 metres of 300mm stormwater pipe in one day – minimising the time the trench was open and preventing the fence from falling in.
November 2016 – January 2017
To upgrade an old section of 250mm steel water main with 250mm PE – including the replacement of valves, hydrants, tees and lateral connections to properties.
The water shortage in Havelock North following the e-coli outbreak just a few months before the start of the project coupled with a need for more water pressure to residences during the coming summer months meant that time was of the essence on this project.
Public safety and disruption was also a concern as the work was to be carried out on a main roundabout during a busy time of year.
Although the project was planned for completion in January 2017, Drainways got the job done in December 2016.
June 2016 – July 2016
To replace a 100mm asbestos pipe with a new 150mm PVC pipe, including all lateral connections to the boundary.
The old asbestos main was constantly bursting and needed replacing right away. Not only was it a danger to the hundreds of school children who walked over it each day, it was also an ongoing headache for the residents it serviced, who could be without water for long periods until it was repaired.
Drainways was called in at short notice to fix the problem.
Despite having to fit the job into a hectic schedule, the team put in the extra hours to complete the work in under a month, with minimal disruption to the public or adjoining property owners.