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Manhole Cone

This storm drain manhole has a built-in-place or poured-in-place manhole square shaft. Above this is a manhole cone, called a "cone" for its uneven, angled side that lends itself to a smaller opening at the top or entrance of the manhole. Almost all manholes will have a manhole "cone" as their top, upper hand component to allow for a smaller access opening.

Manhole-Cone.JPG

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