The grout mix was designed specially to cope with the challenging site conditions and included ultrafine cement, hyper-plasticisers, silica fume and accelerators. The techniques applied allowed a new grout curtain to be constructed with lower permeability, increased durability and reduced quantities of grout compared to previous grouting campaigns—resulting in major cost savings. Leakage has been reduced by approximately 70 percent to the lowest recorded rate since construction of the dam.
"The Wimbleball Dam Grouting Works project was highly successful in reducing leakage within difficult and challenging ground conditions," said Peter Nicol, CH2M Global Water Business Group President. "We are proud that the team's accomplishments in overcoming a significant technical challenge to ensure the long-term safety of the dam, with minimal impact to the surrounding National Park and water supply, were recognized with this prestigious award."
CH2M leads the professional services industry delivering sustainable solutions benefiting societal, environmental and economic outcomes with the development of infrastructure and industry. In this way, CH2Mers make a positive difference providing consulting, design, engineering and management services for clients in water; environment and nuclear; transportation; energy and industrial markets, from iconic infrastructure to global programs like the Olympic Games. Ranked among the World's Most Ethical Companies and top firms in environmental consulting and program management, CH2M in 2016 became the first professional services firm honored with the World Environment Center Gold Medal Award for efforts advancing sustainable development. Connect with CH2M at www.ch2m.com; LinkedIn; Twitter; and Facebook.
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