Joanne Feast is the new elected Southern Zone representative on the South Eastern Water Conservation and Drainage Board and will serve for four years.
She lives at Wye, south of Mount Gambier, and has a background in nursing and farming.
Her challenger was Eight Mile Creek dairy farmer Michael Black.
The Electoral Commission of South Australia conducted a postal ballot with Ms Feast winning by 14 votes, 173 to 159.
Drainage Board presiding member and Central Zone representative Brett McLaren was re-elected unopposed as was Northern Zone representative Miles Hannemann.
Millicent landholder John Mullins did not seek reelection to the Drainage Board after 20 years of service as a Southern Zone representative.
The lifelong local farmer has had a number of other community involvements including the Company of Seven (life member), the Millicent Silo Strategic Site Committee, Argyle CFS Brigade and the honorary sound and light technician at the Millicent War Memorial Civic and Arts Centre.
The role of the South Eastern Water Conservation and Drainage Board is to provide an effective system of managing surface water of the non-urban lands in the South East, by conserving, draining, altering the flow of, or utilising that water in any manner.