Penneshaw Waste Water Treatment Plant

⁠⁠⁠Kangaroo Island Council (the Council) invites tenders from suitably qualified and experienced Tenderers for the provision of Plant and Labour for construction of Wastewater Treatment Plant at Penneshaw. The Council will enter into a Contract for Services with the successful Tenderer.

There are currently in the order of 235 existing houses in the township of Penneshaw, including the Seafront Hotel, Penneshaw Hotel, Backpackers and Youth Hostels and the newly redeveloped Caravan Park. The ultimate development within the township boundary specified by Council is approximately 435 allotments. Currently wastewater treatment from the existing houses is achieved by on-site treatment via septic tanks or aerobic systems and discharge to soakage trenches or irrigation. Council proposes constructing a full sewage collection scheme with connections provided to each property within the scheme limits. Sewage will be collected by a combination of gravity drains and rising main and discharged to the treatment plant site, some 3 kilometres south east of the town.

Construction of the collection network being full sewer is expected to be completed in stages in order to service fully developed parts of the township initially and expanded as the township develops.

Treated wastewater will be stored in the lagoon at the WWTP site. Class B effluent, as outlined in the SA Reclaimed Water Guidelines shall be achieved. Filtration and disinfection is to be undertaken after the lagoons and recycled water will be used for irrigation.

The treatment requirement is to achieve a mean value BOD not greater than 20 mg/L and a mean value of suspended solids not greater than 30 mg/L. A median termotolerant coliform (E coli) prior to irrigation shall be not greater than 100/100 mL.

Contact Details:- Tom Bloch - Wallbridge & Gilbert, Senior Civil Engineer
* Email: tbloch@wgeng.com
* Telephone: 08 8223 7433