So, WSSC had two different guy out in the front yard, looking with probes & metal detectors for about 6 hours, and never found the shut-off valve. They then brought in a crew with electrical equipment, hooked that up to the pipe to magnetize it, to help find it. Then a backhoe to start digging. there's a big hole in our yard, parts of the sidewalk are missing, I have no idea what time in the morning that crew gave up (I was asleep), and we still have water service (meaning they NEVER found the shut-off valve), and consequently water leaking into our basement.

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On the kinkometer, my kink measures as a sine wave.