In response to my entry about dinner and PCBs, src wrote a comment that wasn't about dinner at all, and was only tangentially about PCBs. It was fascinating, though—I couldn't stop reading it. It was bona-fide engineering porn about the huge-scale electrical and mechanical engineering problems faced by the Los Angeles Department of Water and Power when they found they needed to fix one of their largest underground power lines.
Here's the link. Enjoy! Click Here