The decision comes four weeks after Alliance revealed those plans, but beef processing will remain at the Mataura plant where the processing facilities were recently upgraded.
Meat Workers Union Otago Southland secretary Gary Davis said the announcement was formalising the end of the four-week consultation process between Alliance, staff, and the union.
Earlier this week, the union met delegates at the Mataura plant to discuss options for meatworkers affected by the transfer of the sheepmeat processing to the Lorneville plant.
Mr Davis said they discussed options, including joining the beef processing at Mataura, transfers to the company's Lorneville plant with half redundancy, or full redundancies.
"We've thrashed that out pretty well, I think. There's still some people sitting on the edge wondering if they can get in to beef processing in Mataura. Some older employees are still deciding what they will do."
He expected redundancy payouts to be made by about mid-November.
Alliance chief executive Grant Cuff said the end of the consultation process had brought some certainty to those working at Mataura and to the wider Eastern Southland community.
"As part of the consultation process, we carefully considered all the feedback from our employees and the unions involved. However, no other viable alternative to the proposal emerged during these discussions."
He said many employees recognised there was a "significant surplus" of processing capacity for the declining stock numbers.
"We are now focused on working towards achieving the best outcomes for all those affected."
Mr Cuff said all affected processing workers had been offered employment at Lorneville, and the company had a process under way with management, supervisors, engineers and administration staff, where there would be some redundancies.
A group has been formed to ensure anyone affected by the closure of Mataura's sheep processing will be able to access information quickly and easily.
The Community Action Team is a collaboration between the Gore District Council, Mataura Community Board and Community Networking Trust. Team members have been talking with central government agencies and community social service groups to ensure as much information and assistance as possible is available for Mataura meat workers.
Mataura community development officer Jo Brand said a "one-stop information shop" was set up in her office in the old Mataura library, in McQueen Ave. This was close to the plant and easily accessible for meat workers, their families and business people.
