A state government development application has been lodged with the Northern Midlands Council for the job.

Works designs will be open for public comment and on display at the Longford Council chambers from May 6 to 20.

Environment Minister Matthew Groom in December said the project was hoped to be under way by "late summer", however works are yet to begin.

The project is part of a $100,000 election promise from the Liberal government.

A Department of Primary Industries, Parks, Water and Environment spokeswoman last week said plans were developed by river engineers and surveyors.

"The design is intended to remove the debris accumulation in the river, while meeting appropriate standards for environmental protection," the spokeswoman said.

"In addition to the development of the works design, a Tasmanian contractor has been engaged to undertake the work."

The spokeswoman said the job would be carried out on-budget.

An attempt to clear the log jam was made about 10 years ago, although continued backlog has seen it stretch more than a kilometre in length.

The log jam causes issues for Baythorne farmer David Talbot, who said the river blockage created flooding on the property.

The blockage not only pushes floodwater across Baythorne paddocks, a drowning risk for livestock, but has made swamp out of rich flood plains on neighbouring property Hampden.