The Siren Board

That map looks very accurate, with only one thing I found: F.S. #10 is at Frankford & Gibbons; had a 1000A(T) but is now gone, and the new siren is a mile west on Frankford near Midway. They demolished & rebuilt F.S. #10 about 5 years ago, at which time the T-Bolt was taken down. That was my bad luck, since that was our nearest T-Bolt to our house on Timberglen. That may have been the first T-Bolt to be removed.

Charles

There's also a Thunderbolt at station #30 by Royal and Zodiac Ln. that's still around. It wasn't listed on the map. I can see it from I-35 if I look hard enough.

Street View Link