Nathan Contractors
At Nathan Contractors, we value the ability of our team and their commitment to go above and beyond our clients’ expectations. Our people’s work ethic is second to none. They have the ability to take on every challenge, no matter how difficult, and succeed where most others fail.

1300 288 191

info@nathancs.com.au

Level 5, Toowong Towers, 9 Sherwood Road

Toowong, QLD 4066

19/41-43 Liardet Street

PO Box 3658, Weston, ACT 2611

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Paradise Dam – Stages 1 & 2

Dams/Spillways

Paradise Dam Spillway Upgrade – Stage 1, Childers QLD

Nathan contracted to SRG Limited to construct FRP works for Stage 1 of the Paradise Dam Spillway Upgrade.  The upgrade project resulted from changes in State safety legislation and required a significant upgrade of the main the spillway. 

The project scope of works included drilling of anchor rods into the wall and capping them with a concrete slab on two 45m long monoliths at either side of the spillway.  Nathan’s scope for the FRP works included the placement of reo, installation of water-stop, form work and concrete placement and extension of the right-hand bank training wall, and project engineering support to SRG. Nathan work crews operated under a FIFO arrangement and a 24hr roster, 7 days a week. 

The client SRG and the owner SunWater placed a high importance on work safety, construction quality and the project being completed on time before the start of the wet season. 

Project challenges:  the program was tight owing to the likelihood of a major water surge at the start of the wet season.  Hence Nathan operated a 7-day x 24 hr work roster with two crews.  The Surface finishes required on concrete were of a high standard and Nathan achieved the specified tolerances, without defects. 

Facts & figures 

Contract duration: 22 weeks 

Workforce:  12 form workers, reo fixers and concreters 

Quantities:   supply and placement of 125 tonnes of reo; formwork and placement of 1,051m3 of concrete; installation of 172m of water stop. 

Equipment utilised:  a 20T Franna crane, 250T slew crane, 65m Concrete pump.

 

Paradise Dam Spillway Upgrade – Stage 2, Childers QLD

Nathan contracted to SunWater Limited for the construction of the 2nd stage of the Paradise Dam Spillway Upgrade.  Following changes in Qld safety legislation, the dam spillway required upgrading.  The works involved the drilling of anchor rods into the dam wall and their capping with two 45m long concrete monoliths at either side of the spillway.  

Nathan’s scope consisted of the construction of 7 x 45m long infill steps, 2 x 45m tie in steps, modifications and repairs to the Left Bank Training Wall, and the installation and repairs to the Left Bank Stairs. This included: the hydro-demolition of 40m3 of concrete, break back and surface preparation of 560m2 of existing concrete, installation and chemical epoxy of 1769 anchor bars, supply and installation of 60T of reinforcing steel, installation and the chemical injection of waterstop, formwork and concrete placement for 320m3 of concrete. 

Nathan supplied all materials, labour and equipment for the works; concrete was batched on site and supplied by Sunwater. 

Project challenges:  as with Stage 1 of the project, the construction program was very tight owing to the likelihood of a major water surge at the start of the wet season.  Nathan operated a 7-day x 24 hr work roster with two crews.  Concrete surface finishes were specified within tight tolerances and concrete mixes were designed with a low slump.  Hence concrete placement and finishing  had to be expedited quickly.  Nathan achieved both the target program and the quality specified.  

Facts & figures 

Contract duration: 26 weeks 

Workforce:  13 form workers, reo fixers and concreters 

Quantities:   hydro-demolition of 40m3 of existing concrete; break back and surface preparation of 560m2 of existing concrete; install and chemical epoxy 1769 anchor bars; supply and install 60T of steel reo; install / chemical injection of water-stop; formwork and placement of 320m3 of concrete.    

Equipment utilised:  a 20T Franna crane, 250T slew crane, 65m Concrete pump, Manitou.

by Nathan Contractors
Client

SRG Limited