The BGAD situation in itself is quite weird. I have no clue when the 7200s went directly off of ASC's production line, but considering how there was one CSEPP site in Indiana (I believe?) which had a system of Quadrens, it wouldn't be too surprising.NahIDee wrote: ↑Sat Dec 17, 2022 10:16 pmFrom what I've gathered through Google Earth, streetview, and actual field visits from people, there is only one Alertronic AL-7200 left standing; that being the one on Scarboro Road. The one on Blair Road and Perimeter Road, at the K-25 plant, were removed around 2020-2021. The two located within the K-25 plant were removed a number of years ago.
Locations in and around Oak Ridge were removed or replaced sometime in 2012, most of them being replaced with T-121s or the occasional T-135 AC/DC. The earliest known replacement of one of these sirens was around late 2004, this unit being located just northwest of the disc golf course. On Google Earth, it can be seen still standing, but there is a T-121 just on the other side of the road.
So far, Oak Ridge is the only known buyer of AL-7200s, however, there are some speculations that there were four located at the Blue Grass Army Depot in Kentucky. Satellite view really makes it look convincing that there are 7200s at BGAD, although I'm a bit skeptical of this as there is one particular unit that looks to be outright missing a horn, and I would be quite surprised if something was able to completely remove three horns in one vertical row. Makes me wonder if A.C.A. made different configurations of this series, and this particular unit is a single-row model. Unfortunately, there's really only one way to find out; that being to go and get pictures.
If it somehow helps debunk or confirm BGADs 7200 fiasco, the only CSEPP site that I have done full research on (Umatilla) got their system in 1996. They did do sound survey testing in 1994, however.
I believe Tooele may have gotten theirs earlier on in 1992? I can't quite recall.