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MichCon vault vents, Huron Street, Ann Arbor, MI

Vault Vents and Islands

Question Corner: April 2009

by TIm Athan

posted 5/3/2009

Q: What are those poles on the street that are green or blue and have little cone-shaped hats on top? Some of them are in pairs.

A: Once aware of these poles, one spots them in many places around town, for example, on the northeast corner of Huron and 4th Ave. About ten feet high and usually painted green, they are ventilation stacks for MichCon's underground vaults. The vaults hold connections for gas lines, as well as safety equipment to guard against over-pressurization

Q: Why did the city build islands in the middle of Platt Road between Packard and Ellsworth? And what did they cost?

A: The three pedestrian safety islands make it easier for people on foot to cross the street. They cost about $20,000 to $30,000 apiece.

Got a question? Email    (end of article)

[Originally published in May, 2009.]


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