Was doing some wire troubleshooting work at one of our sites last week and opened up a valve box lid. To my surprise I was swarmed with bees that had started to build a hive in the box. Got stung twice before I could remove myself from the area. One of our grounds workers is also a beekeeper so he came out and removed the bees so we could continue our work the next day. He got most of them and those left in the valve box were fumigated. OUCH!