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The Boston Globe


App shows jarring role of cast-metal covers in Boston

Pity the poor pothole, maligned by motorists for years. Who ever heard of a casting?

But it turns out that castings — public works jargon for manhole covers, grates, and other cast-metal lids, as well as the rims on which they sit — are respon­sible for about eight times as many bumps and divots in the road as plain old potholes.

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