Let's think about this. On an average day I coss over Spring Street twice. Once on my way to work, and once back. On weekends, I go to Supermart once per day, which is the same as going to work for these purposes. I probably only spend a minute per day on Spring Street. Maybe two minutes.
And yet, I keep getting pictures of massive pipes. This one is more of a tank, but still. In fifteen days, assuming 1 minute per day, I've seen three pipes. That is a 20% chance, per minute, of seeing a pipe. That means I might have missed 4317 pipes so far this month.