I know I'm kinda reviving this thread, but I found this pdf with 186 of Trojan's sirens, with MORE detail. What I mean by that is that it has the siren's number, the db @100 ft, and if the siren rotates or not. You will find this on pg. 125.
https://inis.iaea.org/collection/NCLCol ... 046491.pdf
Now to the main point, scroll all the way down to page 116. You're going to have to play connect 4 with the 6 maps and place them to get the full map like me. 2a and 2b are great for the siren locations in Longview and Kelso!
I got most of Trojan's sirens mapped out. I plan on getting the map out by the end of this month. I had no idea how old this map is, but it truly seems to get the job done... hopefully.