Storage Lagoon Projects

Melton RWP Additional On-Site Storage & Interconnecting Pipework – Greater Western Water

Construction of 1.1GL clay lined lagoon under Level 1 supervision including site and compound establishment, enabling works, excavation and stockpiling, embankments and access road, Bidim A44 geofabric, filters, rip rap rockfill, interconnecting MSCL pipework, handrails, fencing and gates, Armco barriers, guide posts, survey markers, gauge boards, stilling tube and access stairs; topsoiling and hydroseeding.

Mitiamo Pump Station and Storage Lagoon

Construction of a pump station and an 85ML clay lined storage lagoon.

Works included the construction of a pump station, control building and wet well in addition to the excavation and construction of an 85ML clay lined storage lagoon. Storage lagoon construction included installation of geotextile and rock beaching, connecting pipework, marker posts and access tracks, testing, commissioning and as-constructed drawings.

Euroa Raw Water Storage Augmentation - Portion B

Upgrade of a 500ML Storage Lagoon to an ANCOLD standard 700ML Storage.

Works included full subgrade rectification inclusive of basaltic and granitic rock removal and replacement with Zone 1A clay liner, installation of concrete encased DICL inlet and outlet structures, detailed rock cleaning and sealing, installation of extensive spillway structure, surface drainage,  site access roads and crest capping, asset register, as-constructed drawings, site commissioning and development of O&M manuals.

Euroa Raw Water Storage Augmentation - Portion A

Construction of a 300 megalitre earthen storage lagoon to ANCOLD standard

Works included bulk earthworks, pump station and pipework, inlet structures, drainage, fencing, as-constructed drawings and asset register.

Colac

Construction of 465ML Colac Basin No. 5 which was delivered under the stringent OH&S, quality and environmental requirements of Barwon Water.

Works included placement of zoned fills (zone a and b materials), filtration layers and gravity support sections; Installation of numerous concrete structures (including an eleven meter high outlet structure); Installation of extensive DICL pipework and associated fittings ranging from 150-600mm diameter; Installation of a suspended steel gantry way and associated structural steel works; Placement of geosynthetics and lagoon rock lining; Completion of stringent geotechnical testing; and Electrical control work

Aurora

Construction of 280 megalitre waste water storage lagoon for the Vic Urban Aurora project.

The project consisted of; Bulk earthworks in clay and hard rock; Rock excavated on site was re-used for embankment protection; Stripping and separately stockpiling of all topsoil from the storage site; Excavation of insitu clay material and insitu basalt rock; Construction of embankments, spreading of crushed rock, load cart and placement of 100mm clay liner; Construction of a crushed rock access road around the crest of the embankments; Construction of rock beaching with geotextile underlay; Installation of topsoil around the outside embankments; Creating of mounts north of existing extent of works and south of northern stockpile.

 Ouyen

Construction of a series of 60ML waste water treatment lagoons in Ouyen.

Works consisted of; Bulk earthworks; Clay liner placed under Level 1 control; Pipework; Placement of geofabric and rock lining.

Works were constructed in drought conditions using dam insitu material requiring extensive moisture conditioning to achieve moisture and compaction requirements under Level 1 control.