| 41. | Simple dry wells consist of a pit filled with gravel, riprap, rubble, or other debris.
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| 42. | Construction efforts required 582, 000 cubic yards of concrete and 122, 000 cubic yards of riprap.
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| 43. | The saddle dam was built of earthen fill, and reinforced on its lakeside by gravel and riprap.
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| 44. | The base had also been surrounded with 2, 000 tons of riprap to ward off ice damage.
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| 45. | The lakeward sections of the breakwaters are stone-filled concrte, with riprap piled against the outside.
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| 46. | There is riprap on the creek in Leggetts Gap as it flows near major highways in this stretch.
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| 47. | But everything we know says that what they are doing to the rivers with riprap and levees is wrong.
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| 48. | Riprap, as the boulders brought down for protection are known, lines the base of the fragile bluffs.
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| 49. | The ledge was, with the help of divers, made approximately level with small broken stone and riprap.
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| 50. | The design specification called for riprap with 50 percent of the stones heavier than, and the remainder between.
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