Quartz
Quartzite
Quaternary
Quicksand
"Controlled low strength material (CLSM)
Radial
Radial gate
RADIUS
Raffinate ponds
Ramp flume
Ramp rate
Random earthquake
range
Rapid
Rapid flow
| Raptors
Rated capacity
Rated head
Ratio of reduction
Reach
Reactive power
Ready reserve
Reattachment deposit
Rebar
Recharge
Recharge rate
Recirculation zone
Reclamation Reform Act of 1982 (RRA)
Recreation
Recreational benefit
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