The BLM added a 4th district in the latter portion of 2020. An Upper Colorado River Fire Management Unit has existed for decades and Grand Junction has been the dispatch center for this unit. When the BLM reduced the number of districts it had some years ago they split this unit in two with the Grand Junction Field Office going to the Southwest District and the Colorado River Valley Field Office ending up in the Northwest District. This meant each Field Office was being dispatched by Grand Junction and the Fire Management Unit encompassed both of these Field Offices, but each of them reported to different district managers. I guess this was causing some confusion and inefficacies so a new district, headquartered in Grand Junction was created.
I haven't researched the district numbers, although I have some information that the Southwest District is District #3. So a Type 4 engine on this district would be 3421, where 3 is the district, 4 is the engine type, 2 refers to something local, such as a station or duty location and the 1 stands for the engine at that station or duty location.
The nationwide state office, district and field office map was developed earlier in 2020, but did not include Colorado's district change. I'm not sure when that map will be updated.
The new district map is found here:
BLM Colorado Admin Units October 2020
Here is a thumbnail:
I haven't researched the district numbers, although I have some information that the Southwest District is District #3. So a Type 4 engine on this district would be 3421, where 3 is the district, 4 is the engine type, 2 refers to something local, such as a station or duty location and the 1 stands for the engine at that station or duty location.
The nationwide state office, district and field office map was developed earlier in 2020, but did not include Colorado's district change. I'm not sure when that map will be updated.
The new district map is found here:
BLM Colorado Admin Units October 2020
Here is a thumbnail: