Neale Park Sewer Pump Station Upgrade

Contractor: Downer
Project Manager: Nelson City Council
Budget: $6.3 million
Status: Construction
Timeframe: Complete in 2018/19 financial year

IMG 8351IMG 8342IMG 1605

 

Progress

update december 2018

Following a period of wet weather and challenges managing incoming flows, a dual pipe bypass was installed to complete work on the existing structure. After draining of the old forebay and channel areas, some extra work was needed before applying new coatings. An opportunity has also been taken to upgrade the bypass control weir to improve site resilience and allow greater wet weather flow capacity to the storage tank, reducing the risk of wastewater overflow from the site.

The new 600mm diameter pipeline connecting the pump station to the existing 750mm diameter pumping main has been pressure tested and is now ready for service. Four new pumps have been installed and bump tested ready for final commissioning tests in January 2019. The control system and alarm monitoring states have been tested and now ready for handover to Council’s SCADA maintenance contractor when the new pump station goes live next year.

Currently, the contractor is installing the remaining mechanical equipment at the headworks and roof hatches before the system can become operational. Once flows are going through the new pump station, the remaining work on the Ozone odour control system making use of the existing wet well structures can be completed. Site finishing works including decommissioning of the old pump station will take place in February 2019 with the contractor expecting to be fully finished on site in March 2019.

The 30kph speed limit remains in the area due to the construction activity so please take notice of this when driving through to the Neale Park Skate Park for everyone's safety.

Update September 2018

The Generator building has been completed and awaiting fit-out for fuel tanks and the last of three 500kVA diesel-powered generators. A new 1000kVA transformer has been installed and a new 11KV power supply commissioned for the site.

 The Main control building fit-out continues with the installation of a new electrical control system including the emergency change-over system for continuous power supply.

Council’s SCADA system for site communication and control is being upgraded to accommodate all the new equipment and alarm monitoring.

 New concrete structures have been completed including the roof. Surface coatings are underway before completing mechanical fit-out work.

Above ground pipework and valves have been installed and the platform structure is in progress including fibre reinforced plastic railings for durability.

An important part of construction for two significant pipe connections is being able to bypass the existing pump station. There are some challenges for the contractor to manage flows as part of their methodology for temporary works and a number of site issues to overcome.

Currently, the contractor has been waiting for a suitable weather window to allow bypass works, which has caused delays to the work programme.

The expected commissioning date for the pump station is currently early December with the finishing work to be done after that.

The 30kph speed limit remains in the area due to the construction activity so please take notice of this when driving through to the Neale Park Skate Park for everyone's safety.

Neale Park Sewer Pump Station Upgrade FRP Railing Around Valve Platform Mike Booker 26Jul2018

Update April 2018

The main control building now has a new roof and matches the new generator building next door.

A new duplicate power supply cable has been laid across Neale Park to the big stormwater pump station off Weka Street so that all duty pumps can be run off the new generators. The backup power supply will ensure the pumps can all run at any critical time.

The new concrete wet well structure is now up out of the ground and preparations are being made for pump and pipework installations. Inlet channel works are now being progressed for a new mechanical bar screen and a vortex chamber for grit removal. Once these structures have been fitted out, a roof will be constructed to contain odours that will be treated by the new odour control system.

The wet weather and storms earlier in the year have caused some construction delays so the expected completion date for this work is now November 2018.

The 30kph speed limit remains in the area due to the construction activity so please take notice of this when driving through to the Neale Park Skate Park for everyone's safety.

Neale Park Sewer Pump Station Upgrade Wetwell Scaffolding Mike Booker 05Apr2018Neale Park Sewer Pump Station Upgrade Wetwell Construction Mike Booker 05Apr2018

Update January 2018

Construction work is well underway and the new generator building is now a prominent feature beside the old control building. There will be 3x 500kVA generators in the building of which two will serve the big stormwater pump station across Neale Park off Weka Street.

The new concrete wet well foundation slab has been poured at 3.1m depth below ground level and the remaining structure will be constructed and fitted out over the next 10 months. Site work is expected to be completed by the end of October 2018.

There is a 30kph speed limit in the area due to the construction activity so please take notice of this when driving through to the Neale Park skate park area for everyone's safety.

Neale Park Sewer Pump Station Upgrade Site Photo 08 Mike Booker 19Dec2017

Neale Park Sewer Pump Station Upgrade Site Photo 07 Mike Booker 19Dec2017

 

Update September 2017

A construction tender has been awarded to Downer NZ Ltd and site work is expected to start mid-September with completion by the end of November 2018.

Due to tight working space available in the area there will be some access and parking restrictions near the pump station site. The work site will be well fenced and please take note of any signage in place as construction progresses.

The upgrade will have significant benefits including increased pumping capacity for future growth, treatment of odour, and resilience to potential wastewater overflows.

Neale Park Pump Station 2

Update April 2017

 A tender for the construction work has been advertised on TenderLink. Tenders close on 1st June 2017 with an expected 3-week tender evaluation period.

Work could start as early as August 2017 subject to tender award. The construction programme is expected to be  around 12months but contractors will have an available construction window and due date of completion extending to April 2019 to provide more flexibility in managing workload commitments.

Update December 2016

Detailed design has been completed and the resource consent is currently being processed. Tender documents will be put together in late January 2017. The tender period for the construction work will be eight weeks with tender evaluation in April 2017.

Work could start as early as May 2017 subject to tender award and an approved construction programme.

Update June 2016

Work is currently in the detailed design phase, with site investigation, geotech, survey and structural assessments completed. Construction plans are being finalised for tender, and a design report being prepared to support a resource consent application expected to be submitted late July 2016.

A tender for construction will follow and is expected to be awarded prior to Christmas.

Background

This project is aligned with critical Council functions, protecting the health of the community and environment. Sewage from Bishopdale northwards is piped to the Neale Park pump station and then pumped to the Nelson Wastewater Treatment Plant along the state highway north of the city. Due to the distance, the pumps have to work at higher pressure and are not capable of delivering expected future sewage flows from planned city development.  Upgrading to new pumps will ensure the system can cope with future flows.

Neale Park pump station was constructed in the late 1960s. All the original pumps have now been replaced, rather than repaired, as parts were no longer available. The site layout has contributed to ongoing odour issues in the immediate vicinity. A new pump station is proposed for the site, making use of the existing building, and incorporating modern odour control and some wastewater pre-treatment. 

 

Location