Police were patrolling Wingewarra Street when they spotted Harrison Moulder, 21, driving a Toyota Hilux at an excessive speed through the roundabout at Fitzroy Street at about 8.25pm on June 13 this year.

According to police, officers caught up with the vehicle and stopped it on Darling Street for a random breath test.

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Following a positive result, Moulder was taken back to Dubbo Police Station, where he returned an alcohol reading of 0.075.

Moulder told officers earlier that day, between 9am and 12.30pm, he had consumed about 24 bottles of full strength Great Northern beer, and had not eaten.

In Dubbo Local Court on Wednesday Moulder pleaded guilty to low-range drink-driving.

Defence lawyer Corey Suckling said Moulder had been out fishing with friends and had a couple of drinks throughout the day, before he was caught driving into town, with the intention of going out.

"He was of the belief it would have been okay to drive, admittedly it was a mistaken belief," he said.

Mr Suckling said Moulder was a young man and gainfully employed as a builder, who until recently had no criminal record.

However the court heard, Moulder had been placed on a community corrections order only a few weeks ago.

"Only recently he's fallen into behaviour involving alcohol," he said.

Magistrate Gary Wilson said however given his history he was not going to receive "much sympathy or leniency" from the court.

"Particularly as a good behaviour bond was imposed only a matter of weeks before this offending," he said.

"You cannot be afforded any leniency given the manner in which you were treated."

Moulder was disqualified from driving for four months and fined $500.