Thieves at the Narromine Irrigation Scheme

Scheme workers arrived on Friday morning to find six rolls of the 100 by 25 foot EDPM Membrane Rubber missing.

Scheme manager Robert Sharpe was left extremely disheartened.

"It's just thieving and it's terrible," he said.

"It was planned. You'd have to know what to do with it."

Mr Sharpe said it was interesting the size lining had been taken because it needed special glue and tape, which wasn't stolen, to hold it in place.

"You could use it for small dams," he said, shrugging in disbelief.

The police have recorded the lining would have gone missing between 6pm on Thursday and 6am on Friday at the Narromine Irrigation Scheme on Tullamore Road.

Mr Sharpe said although it's insured the theft would still prove costly.

"We get it from the US and when we bought it we were above the US dollar," he said.

"It'll hold us up if we run out because we have to order more."

The shed the rubber is held in has cameras but this rubber was stolen from the site.

"We have to leave it there to continue the work," he said.

Mr Sharpe said there was rubber available if the thieves had for it.

"If they wanted rubber I could have given them our off-cuts," he said.

Police are urging anyone with any information to contact them at 6229 1444 or call Crime Stoppers on 1800 333 000.