Mr Henderson came forward publicly on January 7 to having temporarily erected the shutters over a culvert under Lake Albert Road and was fined by the Natural Resources Access Regulator for the stunt.

He quickly removed the shutters, which he said were installed as a protest driven by frustration over a lack of action on fixing the lake's low water levels.

On February 16, amid an escalating and very public feud with council, Mr Henderson said his NRAR fine was "justified".

"I knew there was some sort of penalty. They were fairly lenient on me. But unfortunately you've got to express some things and cop it on the chin to get your point across," he said.

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On February 12, Mr Henderson accused Wagga City Council general manager Peter Thompson of failing to honour his promise not to pursue police action for the shutters.

But he has since admitted he was questioned by police over a separate incident of vandalism, not the Tatton Drain shutters as he previously told the media.

Mr Thompson wrote to NRAR, in correspondence seen by The Daily Advertiser, asking the watchdog to be lenient on Mr Henderson regarding the Tatton Drain shutters.

When he was asked why he shouldn't have been charged for what was an unlawful act, Mr Henderson deflected to the NRAR fine.

He is backed by loyal friends and fellow angry residents, with supporters crowdfunding to raise $1,575 since Sunday.

Mr Henderson said the additional money would go into a "Water for Lake Albert Fund" to be spent on "any promotional gear or anything else we need to keep pushing this across the line".

He said he was questioned by police over the removal of a set of gates on a weir that forms part of the lake's dam wall, in an act of "sabotage" that mayor Greg Conkey condemned.

Mr Henderson, who has not been charged, said he didn't know who had removed the gates and said "no comment" when asked on Tuesday what he thought about the action.

Mr Thompson wasn't able to say whether the weir was actually functional before the gates were removed and then repaired by council.

Cr Conkey and Mr Thompson have appealed to the community for help in finding the vandals who have not yet been charged.

Council has this month submitted a draft plan for the future of Lake Albert to NSW Water Minister Melinda Pavey.

The proposed solution would see Wagga receive an annual credit for the 5000 megalitres of treated effluent it returns to the Murrumbidgee River and use that credit to pump an additional 2000 megalitres of water into Lake Albert when required.