Bringing back this age old topic as it is still relevant to how the DB is marked. I haven't personally listened to TG 1003, but I recently started coming around to the same conclusion as what PRO2006 reached 6 years ago after recalling and talking to Dan regarding hearing a rescue operation in the Strontia Springs area of Douglas County with mutual aid from Douglas County SO, West Douglas FPD, and Douglas County OEM's contracted helicopter N911UH from Rampart Helicopters. I would like to extend this thought to TG 1001 as well.
The reason I believe that TG1001 & 1003 are part of Douglas County Search and Rescue is because how the TGs on the system have been assigned so far. Most of the original Douglas County TGs seem to be in the low 1000s, especially a lot of the DougCo SO and FD TGs, while Arapahoe County TGs seem to be in the low 3000s. I might be incorrect of my DTRS history, but I believe Douglas County's TRS was one of the original system before DTRS was built off of it. If this is correct, then Douglas County would be one of the the first agencies to have their TGID assignments.
I consulted Steve's Trunking Logs for some more information regarding this. What I have found so far is that Radio IDs on TG1003 (the 1027xx range) fill a large block of RadioIDs that have been well established as Douglas County Radios, and radios on TG1003 are very often associated with Douglas Sheriff and FD talkgroups (and TG1001 occasionally). There's also a large presence of Douglas County Dispatch Consoles on the TG. I have done extensive logging of the Silver Heights in the past months and have noticed that there has been a considerable greater rates of voice channel grants and affiliations with Silver Heights when compared to other Arapahoe County oriented sites (Chevron, Lookout Mountain, and Smokey Hill).
While all this data is nice, I have never had this TG programmed into my scanner because it is still listed as Arapahoe County Search & Rescue and therefore haven't actually heard rescue operations on this channel. I was wondering if anyone followed up on this topic and actually determined if these TGs are actually incorrectly labelled and belongs to DCSAR?