Robert Guthrie, 50, formerly of Langholm, was told by a judge his offending was "extreme".
The events - many of which go back centuries - are coming under increased financial pressure.
National Highways, which carried out the repairs, says the work brought "unique challenges".
Numbers of the iconic bird in southern Scotland are at record levels despite some setbacks along the way.
A committee is told it is "utterly bizarre" that gulls are protected while the "cute goats" are not.
The 10,500-acre Tarras Valley reserve is being scoured for the presence of the tiny harvest mouse.
Thomas Edgar was airlifted to hospital but died before arriving.
The 71-year-old was taken by air ambulance to hospital but died shortly afterwards.
The 36-year-old was pronounced dead at the scene of the accident a few miles north of Langholm.
