Rivelin Dam, Peak District National Park Rivelin Lower Dam is
used to supply water to the nearby treatment works. The upstream
face is protected with stone pitching which has weathered over
the years and more recently suffered from some vandalism. A
long-term solution was required to strengthen the upstream face
and which was acceptable to the Peak Park Planning Authority.
Yorkshire Water proposed Open Stone Asphalt or repairs to the
stone pitching. Although there were initially concerns over the
visual impact of OSA, we proposed to surface-dress the layer of
OSA with a gravel which helped the revetment blend in with the
natural stone wave wall. Other Safety & Environmental benefits
of OSA over pitching repairs included a quicker installation
time, longer life-expectancy, and majority machine-work rather
than hand-work. Lean Sand Asphalt was used to fill voids in the
pitching before a layer of 150mm OSA was placed over the
upstream face. - 1,500 m2 of upstream face protected. - Lean
Sand Asphalt placed to fil