South Gladstone Reservoir Pipeline

Client: Gladstone Area Water Board
Location: Gladstone, Qld
Status: Under Construction

The Contractor shall supply all plant and equipment, maintenance, materials, consumables, tools, labour and supervision required to complete the works. Bellrise Investments is responsible for the construction of Stages 1 & 2.

Stage 1:

It is involves the construction of a new DN600 OPCV water main including works required for construction of the interconnections to the existing DN600 main at each end. The pipeline will go from the Northern end of Lamington Drive off Glen Lyon Road to Philip Street, and then will be under bored beneath Philip Street within a new mild steel enveloper. Welded PE pipe will be used for the water main through the enveloper section. The pipe will then travel around the eastern boundary of the Tigalee Creek detention basin and be reconnected to the existing DN600 main at Ch840.

The works will include:

  • Project management and construction approvals;
  • Mobilisation and site management including survey and set out;
  • Soil erosion and sediment control;
  • Clearing and grubbing of vegetation along Glen Lyon Road north of Philip Street as well as around the Tigalee Creek detention basin;
  • DN600 OPVC water main approx 800m;
  • DN600 DICL bends and fittings for connections, air valves and scour valves;
  • Scour valves with discharge manholes are to be installed at low points and air valves at high points as shown in the design drawings;
  • Steel enveloper under Phillip Street (trenchless installation);
  • OD710 PE service pipe through enveloper plus MS special connections and thrust blocks;
  • Testing and disinfection of pipeline;
  • Connections to existing mains including all valves and special fittings, cut into existing main, and commissioning of new main;
  • Rehabilitation of disturbed surfaces;
  • Disposal of surplus materials;

Stage 2:

Works involve the construction of a new DN600 OPVC water main between Ch1220 and Ch1485, including the construction of a smaller temporary bypass near the railway line off Glen Lyon Road. This section of the pipeline will travel from north of the railway line to just south of the railway line. A new temporary bypass pipeline will be installed and commissioned such that the new DN600 pipe can be installed replacing the existing DN600 pipe and along the same alignment particularly the enveloper under the railway, without isolating all water supply to the South Gladstone Reservoir. This temporary bypass will be done by replacing an existing disused DN300 cast iron main which travels through a concrete enveloper under the railway line. Once the temporary bypass is operational the existing DN600 pipe will be removed and the new DN600 OPVC pipe will be installed. This will be installed with scour valves with discharge manhole pits as specified in the design drawings. The pipes to be installed through the existing envelopers will be welded PE. The main connections installed are required to be suitable for connection to the existing pipes.

These works include:

  • DN600 mains north and south of the rail line as well as to connect with the new replacement DN600 mains to be installed in later stages.
  • Project management and construction approvals;
  • Mobilisation and site management including survey and set out;
  • Soil erosion and sediment control;
  • Clearing and grubbing of vegetation along proposed pipeline corridor;
  • DN600 OPVC water main approx 230m;
  • DN600 DICL bends and fittings for connections and scour valves;
  • Scour valves with discharge manholes are to be installed at low points as shown in the design drawings;
  • OD400 PE temporary main;
  • Removal of existing DN600 DI and DN300 CI pipe along alignment of new pipe and temporary mains including within existing envelopers under railway;
  • OD710 PE permanent and OD400 temporary service pipe through existing envelopers plus MS special connections and thrust blocks;
  • Testing and disinfection of pipeline;
  • Connections to existing mains including all valves and special fittings, cut into existing main, and commissioning of new main;
  • Rehabilitation of disturbed surfaces.
  • Disposal of surplus materials;