IFR departure from uncontrolled airport

[FoggyWindow]

If you clear an acft to dept from an uncontrolled airport, how much airspace are you protecting around the field? If I have an adjacent airport nearby, say 9 miles away, is it legal to dept somebody off of it as long as the routes don't conflict? The rule at work is you gotta block 10 miles around the airport, but I can't find it written anywhere in the .65.

 

[TushingPin]

Did anyone ever get any clarification on this? Are you able to release both aircraft at uncontrolled airports 9 miles apart if their routes don’t conflict?

Not reading the rear of this, but wouldn't this be enough degrees divergence to do so?

 

[ZappBand69]

HLN and TWF please chime in

 

[AB19]

How can you guarantee the runway they come off of?

 

[Luckyrun]

You know their route of flight right? Protect 4mi either side. If there is an ODP you gotta protect that as well