A major high level landslip on the River Derwent at Hamsterley Mill, County Durham, resulted in considerable land loss at the high level and created a danger to users of the high level land.
This project was completed in two phases:
Phase one involved the diversion of the River Derwent to allow remedial works to proceed – followed by the construction of a river defence/retaining wall to protect the base of the river bank from further erosion.
Phase two involves backfill and terracing of the area behind the wall which will stabilise the river bank/slope and prevented any further loss of land at the higher level.
This project was environmentally sensitive in terms of river morphology, animal habitat and fish migration. Detailed reports and applications for permission to work were submitted and agreed with the Environment Agency before works began. The entire timetable of phase 1 works was dictated by fish migration patterns.