Previous investigations

SA Water, in partnership with the Barossa Grape and Wine Association (BGWA) have previously prepared four high-level concept plans showing high level infrastructure requirements to bring raw water from the Mannum to Adelaide Pipeline (MAPL) into Eden Valley and surrounding areas.

The four concept plans can be found here or in the Document library section, called Eden Valley concept design options.

Each concept plan was based on the supply of 3.2 Gigalitres of water initially to meet water demands to the respondents to the SA Water and BGWA surveys in 2020.

Based on preliminary feedback from BGWA, the options were prepared and are illustrated on the plans.

The cost estimates provided in the table below are a desktop level class of estimate, with significant contingency allowance, and adopting a number of assumptions which have not been validated through any on-ground investigations. Some of the major assumptions that have been made are:

• That a significant amount of rock would be encountered during construction
• The chosen alignment follows road corridors, some of which contain significant trees and sensitive native vegetation requiring costly construction techniques
• No detailed site surveys have been completed therefore a pipeline material capable of dealing with higher system pressure has been adopted

Apart for the Full Scheme, the scheme options listed are based on SA Water delivering and maintaining ownership of portions of the scheme. Landowners will be required to jointly coordinate, develop and deliver private network infrastructure to supply water to the farm gate of all survey respondents.