I thought this might be of interest, We went for a drive and lunch yesterday at a little cafe in Parkfield Ca. They call it the earth quake capitol of the world as it is right next to the San Andreas fault. The bridge in front of my car is spanning the fault. If you look close you can see how the bridge has been deformed by the earth movement.
About 20 mile downstream of this same creek/fault there is a water transmission line. It is mostly constructed underground except for the section crossing the fault. It had to set above ground to allow for the movement between the two plates. Last big one a 6.0 was in April of 2004.