State Growth minister Michael Ferguson said the government had been briefed by the City of Launceston council about its plans to cease raking the river, and possibly returning to dredging.

He said the government was disappointed raking did not work.

"There was early optimism with this approach," he said.

"While the results are disappointing, the Tamar Estuary Management Taskforce will look at other options to manage sedimentation in the estuary."

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Mr Ferguson said there was no need to seek additional funding at this stage.

Bass Liberal MHR Bridget Archer said she supported the council's decision, which was based on research by the Tamar Estuary Management Taskforce, but did not say if she would rally for more funding.

"There has been a significant amount of money committed to the Tamar estuary's health as part of the Launceston City Deal including the first River Health Action Plan," she said.

Commitments have commenced with the launch of the Tamar Action Grants program which provides incentives for graziers and dairy farmers to stop pollutants entering the Tamar's catchment.

More than 100 expressions of interest in the program have already been received and are currently being assessed.

The council announced it would stop raking the sediment on Thursday after a report showed it had been less effective.

The report will be discussed at the council's 1pm meeting on Thursday at the Town Hall.

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