| 1. | The crushed rock yielded 8 to 9 dollars a ton in gold.
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| 2. | Using the plate compactor, tamp down 4 inches of crushed rock.
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| 3. | Below is 15 centimeters ( 6 inches ) of crushed rock for drainage.
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| 4. | Layered below the crushed rock were sandbags first stacked in 1993.
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| 5. | In that time the road disappeared under the white powder of crushed rocks.
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| 6. | It is used especially for hauling earth and crushed rock.
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| 7. | "It hit on the crushed rock, " he said of his gimpy left knee.
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| 8. | The water was tainted by sodium cyanide used to separate gold from crushed rock.
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| 9. | It was discovered about 1880 when two farmers began to quarry crushed rock there.
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| 10. | High quality crushed rock has a CBR over 80.
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