The government organisation held community meetings on Monday and Tuesday, updating residents on the projects' progress.

The temporary weir and pipeline will be completed by the end of November, and the Peel River flow will cease no earlier than November 30.

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"About 24 properties rely on the river for human need and we're working closely with them to ensure they have access to water," a WaterNSW spokesperson said.

"A number of other customers will be impacted from a stock point of view, which is unfortunate, but right now the focus is on critical human need."

WaterNSW has delayed a decision on a second temporary weir at Tamworth's Jewery Street bridge until February.

The second weir was originally suggested to help keep nearby council bores productive, due to the connection between the river and the groundwater table.

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"There are question marks about how much the bores will be relied on now," the WaterNSW spokesperson said.

"The bores produce about eight megalitres a day at the moment; that may drop to two megalitres when we cut the river."

The emergency pipeline will, for the most part, follow the road easement along Back Woolomin Road. Work is expected to start in mid-November.

Crews will work from both ends and the goal is to complete the project by late February.