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Harding's Earthmoving submitted a successful tender to Tweed Shire Council for the decommissioning and redevelopment of the Kingscliff North Holiday Park, which included the installation of a new Sewage Pump Station (on behalf of Tweed Coast Holiday Parks).
This standalone Sewage Pump Station was to completely replace the Holiday Park's aging and outdated sewage system.
Harding's Earthmoving subsequently engaged Dowdens Pumping & Water Treatment [Brisbane branch] to design, supply, install and commission a specialised Precast Concrete Sewage Pump Station for use in the Holiday Park's redevelopment. Dowdens Pumping & Water Treatment have partnered with Caprari-CPC to become the sole QLD and Northern NSW distributor and specialised servicing agent for the new patented Caprari-CPC concrete packaged pump stations.
Crucial tender selection criteria stipulated by Tweed Shire Council was for the new complete Sewage Pump Station to be successfully operating for at least 50 years and the concrete chamber to provide a minimum working life of 100 years.
The patented Caprari-CPC Pump Stations are cast using a special S50 cement with a minimum concrete strength of 50MPa and utilises an Angaston Marble calcareous aggregate; offering the highest possible resistance to sulphate attack endemic in Australian sewers. Caprari-CPC Pump Stations are specifically designed to withstand harsh environments, including poor soil conditions and high water tables (engineered to 15m depth). Caprari-CPC Pump Station chambers feature steel reinforcing with an internal concrete cover of 65mm to provide additional protection; this unique feature extends their design life to over 100 years - perfectly suiting Tweed Shire Council's tender selection criteria's.
Once selected by Tweed Shire Council the Caprari-CPC Pump Station was designed, sourced, installed (all onsite earthmoving works undertaken by Harding's Earthmoving), commissioned and the entire project managed by Dowdens Pumping & Water Treatment [Brisbane branch].
"During the lead build time (which was 1 week ahead of schedule) Dowdens were in constant contact. Tweed Shire Council made a few changes along the way which were accommodated and organised promptly and precisely every time by Dowdens. The coordination and regular contact I received was second to none. The team at Dowdens were not just salesmen, they actually knew not only how to trouble shoot, but also how to resolve any last minute changes whilst always chasing me up with courtesy! I was more than impressed with the product, price, amazing service and the installation provided by Dowdens Pumping & Water Treatment. I have been in this game for 25yrs and cannot recall getting more professional service in any other field or from any other business than what I received on this project, a rarity. Thanks Dowdens!"
During initial project investigation the Tweed Shire Council reviewed multiple options for their sewage pump station system, including: prefabricated fibreglass, mould formed precast concrete and concrete pour in situ construction. Some of the Dowdens Caprari-CPC systems key advantages / features that met or exceeded Tweed Shire Council's selection criteria include:
The Caprari-CPC Selection software enabled our design team to assist matching the correct system layout to the specific site specifications. Caprari-CPC selection guide allows registered members to generate an integrated design solution for the selection of an appropriate chamber, pumps and mechanical components for a broad range of applications. The integrated design solution includes: GA Drawings of the chamber along with a "CAD Kit" providing all CAD elements enabling rapid transformation of the GA drawing into a full production drawing; Full component listing, including mechanical specification for your customised fit out; System curve, total system duty, pump recommendations and a budgetary quote is available on request.Key Project Features: CLICK IMAGES TO VIEW FULL PROJECT GALLERY
Kurrajong Pastoral Company have engaged Dowdens Pumping & Water Treatment [Rockhampton branch] to design, install and commission a large solar powered stock watering system on one of their rural properties located near Alpha, QLD.
The solar powered stock watering system is required to transfer onsite bore water to existing water storage tanks. These water tanks are used by Kurrajong Pastoral Co. primarily to water the 1,000 head of cattle onsite.
Kurrajong Pastoral Co. specified each head of cattle was to be allocated a minimum of 10gal per day (approx. 45L/day), meaning the pumping system needed to deliver over 10,000gal per day (45,461L).
Water is pumped from the 5" onsite bore (pump set at 35m) with 75m total head into 3 storage tanks via poly line pipe.
The Kurrajong Pastoral Co. solar pumping system was designed to keep overall operating costs down whilst still delivering a regular supply of water to cattle with negligible ongoing service or labour required. Dowdens Pumping & Water Treatment [Rockhampton] designed the system to be more cost effective than running additional wiring and connecting any onsite pumps to mains power.
The new solar pump replaces a B Head Mono Column and Shaft pump - originally powered by an onsite diesel engine. Dowdens solar powered system has thereby significantly lowered the environmental footprint of the entire pumping system.
Key Project Features:
Aurizon Holdings Limited have engaged Dowdens Pumping & Water Treatment [Mackay & Brisbane Branches] to deliver a Water Treatment Plant (WTP) at their Coppabella Township, located on the Goonyella Rail Corridor (the world's largest metallurgical coal rail system) - 159 kilometres South West of Mackay, QLD.
The township of Coppabella was primarily designed and built to service the junction of two railway lines (one from Goonyella Coal Mine and one from Saraji Coal Mine) and to provide accommodation to the regions coal mine workers in work depots. The town was established in three stages, with the first being completed in 1971, the second in 1977 and the third and final stage in 1984. The town is wholly owned and operated by Aurizon Holdings Limited and contains: stations, residences, single-quarters, work depots, hotel, a shop, swimming pool, football oval, caravan park, school, ambulance, fire brigade and of course the new Dowdens Water Treatment Plant which is capable of producing of up to 900kL of potable water per day.
Dowdens engineers and service crews designed, manufactured, installed and commissioned the Coppabella WTP to treat raw water to Australian Drinking Water Standards. As the Principal Contractor Dowdens were provided a set of feed supply water parameters coming into the WTP, and water quality requirements for the delivery of the town's drinking water. From these basics the $2.5 million project came to fruition. The Dowdens WTP replaced the existing water softening plant (located adjacent to the new WTP), whilst future-proofing the growth of the Coppabella township by increasing the WTP's maximum daily drinking water production capacity up to 900 kL/day.
The new WTP is completely automated and user adjustable via the GE Human Machine Interface (HMI) situated in the purpose built site Control Room / Office, minimising the need for direct operator interaction / intervention on-site. A dedicated remote monitoring / alert messaging system was also provided so that in the event of a critical alarm the EDAC 700 RTU will call the WTP Operators advising them of system alarm status via pre-recorded spoken messages.
Security of the WTP site was significantly improved with the establishment of a controlled compound restricting access to authorised personnel only (pictured below). Dowdens also eliminated the need for repetitive manual handling of typical WTP chemical consumables on-site (Salt, Liquid Chlorine and Soda Ash) via the integration of various bulk storage systems.
Dowdens were successful in the tendering process due to:
Dowdens coordinated the design, build and commissioning of the WTP from project inception through to final handover. This included, but was not limited to: preliminary design - detailed design - risk assessments (with client and consulting engineers) - preliminary civil works establishing the site (levelling site) - under boring Peak Downs Hwy for installation of raw water pipeline - installation of all underground services - pouring of slabs - construction of the Ion Exchange (IX) building - installation of process equipment - installation of all interconnecting pipework - electrical installation of control panel and field instrumentation / equipment - commissioning of instruments / equipment - commissioning of PLC program and HMI - successful completion of 'Proof of Performance' testing and all necessary operator training.
The inclusion of a unique Brine generation system was a novel approach that incorporated a salt bulk bag unloader (capable of lifting 1200kg bags - pictured below) and a proprietary piece of equipment from the USA [BRINE ExtremePro]. The IX system is flexible in its design and is capable of producing between 150 - 900 kL/day of potable water with the IX system constantly analysing and compensating for variations of incoming bore water hardness levels.
The existing water softening plant (located adjacent to the new WTP) and raw water supply needed to be retained during the new WTP construction. The old plant was decommissioned over a period of 3 months. Nearing project completion a wet weather event (February 2016) resulted in additional water flows through the WTP site causing some minor displacement / erosion of soil and stone that required a brief plant shutdown to rectify the damage. Dowdens performed this work efficiently and effectively eliminating any risk to the township's drinking water supply.
Dowdens Pumping & Water Treatment design philosophy for this project was: Cost Effectiveness - Current Best Practice - Ease of Installation - Simple & Effective Plant Operation - Plant Reliability & Reduced Ongoing Maintenance.
Water Treatment Plants Key Components are listed below:
Dowdens Pumping and Water Treatment have successfully designed, manufactured and commissioned a self-contained Solar Emergency Eye Wash and Safety Shower. The safety station incorporates both safety shower and eye wash facilities, which are supplied from a water tank via a solar powered Grundfos pump.
This unit was designed and manufactured to comply with Australian Standards AS4775-2007.
Dowdens supplied the portable Solar Eye Wash and Safety Shower station to Downer EDI Mining Blasting Services for use at the Rio Tinto Coal Mount Thorley open cut coal mines (located 15km South West of Singleton in the Hunter Valley region of NSW).
Project's Supply Scope: