In September, North Norfolk District Council (NNDC) agreed to spend £120,000 on various measures to remove the invasive plant species at Overstrand.
The harmful plant causes damage to buildings due to its penetrating roots, and is threatening the stability of the cliffs, which are slipping into the sea due to erosion.
In March, NNDC lost the central section of the sea wall following a cliff slip, which was later found to contain Japanese Knotweed.
Weedkiller was previously applied to the top and base of the cliff, but now a contractor has been brought in to remove the knotweed material from the sea wall.
A NNDC spokesman said: “The council has a legal obligation to dispose of the Japanese knotweed in a controlled manner using a licensed contractor.
READ MORE: 5 reasons to visit Overstrand
Japanese knotweed is destabilising the cliffs (Image: PA)
“Over a six-week period, work has been undertaken to remove the contaminated and non-contaminated slip material, treat the knotweed and localised reshaping of the slope.
“Treatment works were completed using weedkiller on the section containing Japanese knotweed covering a three-metre stretch at the base and top of the cliff.
“A licensed contractor supervised the excavation of the contaminated material and the transfer of that material to a licensed site.”
A digger was called in to remove cliff material (Image: North Norfolk District Council)
The next step in battling the problematic plant will involve stabilisation work at the base of the cliff to “help prevent further contaminated material from slipping onto the sea wall”.
It had been estimated that the removal works could cost up to £120,000, but NNDC’s website says that the exact cost of the operation is still unknown.
AloJapan.com