SID vs ODP

[extra-november]

We all know that Standard Instrument Departures are there basicly to make it easier on the controller, and Opstacale Departure Procedures are there for opstacle clearance. Alright, then why does a very low traffic place like FMN have SIDs? (why don't they just call them graphical ODPs!) Also, BZN has a graphical ODP and SIDs but they look pretty much the same. And lastly, why are airlines filing this graphical ODP in their flight plan at BZN? I thought ATC didnt have to know about ODPs?

[172_driver]

No idea where this place is... but guessing, noise apatement?

[seilfly]

Or could it be that this place is in the vicinity of another, bigger, airport which is the primary reason they produced a SID for the area in the first place?

Edit: I see now FMN is in the US and they are easily "browsable" with Airnav: AirNav: KFMN - Four Corners Regional Airport (http://www.airnav.com/airport/KFMN)

Seems like the only airport serviced by the 2 SIDs there. Probably the only airport in the vicinity operated by airlines of some kind and SIDs are programmable in FMC ;)