Splashez Aquatic Centre hopes to be open by the second week of school holidays.
Mount Isa's swimming pool closed August 8 for what was planned as a six-week outage park of the planned $7.5m upgrade to the Family Fun Precinct.
But it will be at least seven week by the time it opens.
On a social media post on the weekend, Splashez staff said they did not yet have a confirmed date to reopen but were aiming for Friday, September 24.
"However with work still happening it may be pushed back a bit later," Splashez said.
"Thank you everyone for your patience while we are under construction and unable to open the doors (and pools). The contractors have worked tirelessly to get us back open as quick as we can, and we are extremely thankful for their hard work."
Planned work on the facility include putting in new shade structures, new barbecues, new lighting, solar roofing and there will be a private function area that people will be able to hire out.
There will also be upgrades to the perimeter fencing and walls which ties in with a similar piece of work at the fun park next door.
Council's report in its Wednesday meeting said work at Splashez Aquatic Centre was progressing well with the fencing completed including blockwork behind the 50m pool and hercules fencing replacing the existing fending while foundations for the shade structures have been poured and one of the structures framework has been erected.
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