The Perils of Pee

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Most engineers are interested in the survivability of their designs and take every measure to foresee potential sources of failure. Some failures, however, are difficult to predict and prevent. Urine, for example, is not something one would normally think of as having the power to destroy landscape features, but a spraying of it often enough over time apparently can do some serious damage, as in the case described in this article:

http://sfist.com/2015/08/05/urine_trouble.php

lightpole_pee

Screengrab of the lightpole that took out a car at Pine and Taylor: KTVU.