Keddington Lock on Louth Navigation breached in 2018 allowing a drop in water level.
The water is no longer in the centre of the canal or high enough to feed the Grade II listed water mill at Alvingham.
Keddington Lock has been in a poor state for a number of years but has now become unsafe.
Remedial work requires major construction which is beyond the volunteers of Louth Navigation Trust.
Lindsey Marsh Drainage Board have offered to undertake the works as a good will gesture, using in-house resources and equipment where possible.
A new weir will be constructed using 200T of stone and both banks will be reinstated using Geogrid technology through which natural material will grow.
Louth Navigation Trust are appealing for donations to support this repair to the canal in advance of the canal's 250th anniversary celebrations in 2020
The works are expected to cost £25,000.
Contributions have already been received from IWA Lincolnshire Branch and are pledged by ELDC, AW, LNT and Alvingham Mill
LCC and EA have waived their permit charges thereby contributing 'in- kind'
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