Member for Murray Austin Evans has announced extra funding for a library upgrade and gymnasium at Murrumbidgee Regional High School.
The state government has coughed up the extra funds on top of $25 million originally promised for the merger of Griffith and Wade high schools.
However, Mr Evans refused to say how much extra cash is actually coming.
"We don't have the figures yet, the department are seeking the tenders for the contract and don't want to violate confidentiality (agreements)," Mr Evans said.
Mr Evans said the extra funding will enable a library upgrade and a new multi-purpose space to be built at Griffith High, while a new gymnasium and assembly space will be built at Wade High that will accommodate all students from both campuses.
When asked why the department hadn't budgeted the works closer to the $45 million that was initially promised by Adrian Piccoli, Mr Evans said the $25 million was intended to be a starting point.
"It's my impression that the $25 million would be the first step, then as the department worked the existing plan they would decide what steps needed to be taken from there," he said.
Mr Evans believes these additional works will be completed after the works already planned for stage one and stage two of the merger.
Mr Evans said the education department agreed to fund the extra infrastructure following concerns raised by parents and teachers who attended P&C meeting in December and were alarmed at a lack of recreation space.
There was also concern Wade High would be left without a sports hall.
The Murray MP also said the two campuses will also be receiving funding to have their current backlog of maintenance jobs cleared by June 2020.
According to Mr Evans the funding for this maintenance work at Griffith High and Wade High will come from a $449 million commitment announced by the Coalition this year, which he promises will see every public school in the Riverina have their maintenance backlog as of February 2019 cleared by June 2020.
Figures from Shadow Education Minister Jihad Dib say as of 2017 the backlog of maintenance jobs at Griffith High was valued at $754,811 while the backlog at Wade was $663,897.
Maintenance backlog at public schools in Griffith region as of December 2017, according to Shadow Education Minister Jihad Dib.
Beelbangera Public School - $188,419
Carrathool Public School - $5,070
Coleambally Central School - $627,284
Gol Gol Public School - $58,153
Goolgowi Public School - $102,887
Gralee School - $104,796
Griffith East Public School - $142,725
Griffith North Public School - $181,852
Griffith Public School - $233,645
Hanwood Public School - $185,140
Hay Public School - $67,298
Hay War Memorial High School - $145,807
Hillston Central School - $588,933
Kalinda School - $27,300
Lake Wyangan Public School - $114,236
Leeton High School - $585,756
Leeton Public School - $448,078
Parkview Public School - $500
Pomona Public School - $2,293
Rankins Springs Public School - $90,017
Tharbogang Public School - $57,308
Wamoon Public School - $80,234
Whitton-Murrami Public School - $123,995
Yanco Agricultural High School - $878,730
Yanco Public School - $182,110
Yenda Public School - $100,493
Yoogali Public School - 130,745
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