Long ditches with stone-paved sluices for washing this mineral-bearing material have long been used by the Indians, who also construct stone bars across the beds of the streams to make riffles and hold the deposited grains of gold. [Please select]
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"Gentlemen, there ain't no better way to save fine gold than with undercurrents an' blanket riffles."' [Please select]
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Then began a strange procedure, for one man clambered upon the sluices and, with a pick, ripped out the riffles. [Please select]
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It was not filled with shimmering riffles, and rocks about which the water sang and foamed. [Please select]
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Here and there, on small streams, are shallow riffles, where large fish are often half out of water as they struggle up. [Please select]
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Pools and riffles along 1/4 mile of stream were seined in the early collections. [Please select]
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On Otter Creek (Station C-13) the species was common in shallow bedrock pools below riffles. [Please select]
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As noted above, these streams are normally clear, swift and have steep gradients and many rubble and gravel riffles. [Please select]
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Riffles 6-8 inches deep having gravel bottom; pools to 3 feet deep; bottom gravel and mud; width 8 to 15 feet; water slightly turbid. [Please select]
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