On December 18, the ministry put the school under official intervention and appointed Chris Saunders as limited statutory manager.
The action plan drawn up by Mr Saunders, dated February, found staff were "highly critical" of the board of trustees and the former principal.
Further documents released under the OIA show a complaint by teachers was made to Education Minister Hekia Parata in July 2012, which was then referred to the board.
The "serious concerns" included alleged intimidation and bullying of staff, unwillingness of the board to address issues, few opportunities for Maori learners, high turnover of staff and falling roll. Complaints were also made in 2011 and 2008.
Mr Bratty, who had been on the board for eight years, said the end of last year was a difficult time. Learning the fixed term contracts were not valid was "shocking", he said.
While the board had investigated the complaints, it was difficult as many of the teachers would not talk to the board, Mr Bratty said.
The action plan by Mr Saunders noted staff were positive about the arrival of new principal Cherise Wilson, who began at the start of the year.
"Communication with the staff has been difficult, mainly because of trust issues and factions in the staffroom," Mr Saunders wrote. "This problem already appears to have eased and the principal [Ms Wilson] is working hard to promote an open and transparent style of leadership."
"Everyone is looking at moving forward," Ms Wilson said.
Ms Donnelly left to become principal at Karamea Area School, which on March 26 was appointed a limited statutory manager. The appointment related to issues before Ms Donnelly's arrival.