Non-Rippable Rock definition
Non-Rippable Rock means: in the context of Rock encountered in service trenches and/or footings, Rock that cannot be ripped, broken or removed by mechanical means using a 20 tonne excavator; and in the context of all other Rock, Rock that cannot be ripped, broken or removed by mechanical means by using a D8 bulldozer, D9 ripper or 30 tonne excavator;