Massive water pipe rupture in hayward last sunday. A rupture that occurred right along this fault. It ripped this street creating a large sink hole and creating a fast moving river of water, mud and rocks. Check this picture, it shows where the fault is relative to the pipe failure. This one was taken before sundays break of a suring right across the street that shifted due to seismic creep. Bill says its happening all the time on the hayward fault. Its moving about a fifth of an inch a year, that doesnt sound like much, but in 40 years, thats getting close to 10 inches of motion. And so 10 inches of motion is enough to stretch some pipes. Reporter hayward city spokesman chuck finney agrees, the failure was most likely caused by Seismic Movement and the old pipe was installed about 40 years ago. Its a cement pipe, and so if you have shifting ground around it, it can cause a fracture like that. Reporter residents say theyre not surprised by the likely cause. If you look at the foundatio