4720.3922 INTAKES.
Intake structures must provide:
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A.
a velocity of flow 0.25 to 0.50 feet per second through the inlet structure so frazil ice is held to a minimum;
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B.
for the withdrawal of water from the depth of the best water quality;
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C.
inspection manholes every 1,000 feet for pipe sizes large enough to permit visual inspection;
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D.
protection against rupture by dragging anchors, ice, and other activity; and
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E.
permanent monuments to reference locations.