The dam near Tamworth, has been creeping closer to 100 per cent capacity in the past few months, but releases have dropped recently and water is now lapping at a level not seen since 2012.

Lake Keepit was sitting at 99.9 per cent full on Thursday afternoon.

The capacity has splashed around a bit this year as huge water releases of up to 6000ML per day washed downstream of the dam.

But data from Water NSW shows that, so far this month, only 28ML in total has been let out, which is just 11 Olympic swimming pools worth of water.

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It's given the source a chance to rise to just a drop less than capacity and though it's been close, the dam has not had water that high since 2012, when Lake Keepit filled.

The lake has welcomed back plenty of visitors, wildlife and water sports lovers since the COVID-19 lockdown lifted and since it bounced back from the brink of nearly drying up in 2019 and 2020.

Chaffey Dam, Tamworth's main water supply, was still spilling on Thursday, three months after filling.

Split Rock Dam has climbed to 46.4 per cent, while Copeton Dam was sitting at 86.1 per cent.

It's time to get the brollies out in Tamworth as more rain is set to pour down and enter waterways.

The forecast shows showers are likely from Thursday night through to Wednesday.

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