Some of the work already done on the Hot Springs will have to be demolished so work can begin again.
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A bigger fix than previously suggested is needed to repair the long-delayed $2 million rejuvenation project, according to tender plans just released.
According to plans released as part of the tender, an already completed footpath will need to be demolished and poured again.
There will be lots more rock baskets, gabions will be removed and later replaced while deep footings are constructed to stabilise the eroded river bank.
The third tier on the slope will have to be reconstructed and trees planted.
There will be a new rock wall at the bottom of the tier.
Katherine Town Council has released few details about the works, other than to say last year the previous wet season had caused erosion issues with the project.
One alderman described it last week as "a few glitches".
Many trees were removed on the steep bank in the first stages of the project.
"Uncontrolled fill" in the project, which makes up the tiers on the slope, will be removed and replaced with compacted fill.
The viewing areas also appear to have been targeted for repair.
Works are not expected to resume on the Hot Springs project until August, the council was told late last month.
Called "Katherine Hot Springs Remedial Repairs and Landscaping Stage One and Two" - the tender documents did not include any costings.
Mayor Fay Miller last month told Katherine Town Council the long delayed works were now expected to resume after this year's "tourist season".
"We are not planning on having a lot happen down there during the tourist season," she said.
"We don't want to interrupt as much as we can the business that's already there."
Mr Jennings said he expected it would take contractors about a month to bid for the work before the tenders would be considered by council.
He has said repeatedly the repair costs would be contained within the overall project budget and would not be borne by ratepayers.
Mayor Miller told the rates forum earlier in the month all the Hot Springs work would be completed this year.
The $2 million upgrade, when first announced in April, 2016 was initially to be completed by the end of that year although the scope of the project was expanded after the launch.
Almost $1 million was budgeted for the first stage of the project with most of the money funded by the NT Government.
The first stage involved the removal of trees and terracing on the main entrance bank to the Hot Springs and the installation of the gabion rock baskets.
The 2018 wet season caused "some erosion" in the lower gabion rock wall tier, the council discovered.
Mode Design Corp was appointed to finish the project along with Irwin Consult.
The second stage of the project involves a new playground at the top of the river bank, near the Pop Rocket Cafe.
The Katherine River stayed remarkably low this past wet season which hopefully saved the bank from any further damage.
Construction fences have been a feature of the river bank for almost three years.
Tenders will close on May 24.
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