Obstacle avoidance between take-off and airway

Mxsmanic wrote:
J.Kahn writes:

If no instrument departure gradients are published in a departure
procedure, then the default gradient requirement applies, which is 200
ft/NM.

OK, thanks.

It looks like IFR departures from runway 26 in L35 aren't allowed at all, so I
suppose I'll have to depart from runway 8 in the future if I really want to
depart IFR. Odd that there's nothing for runway 26 since it leads right over
the lake.


So you can be grounded by unfavorable winds... that sucks.

I wonder if the reason is simply that departure in that direction
doesn't meet 200 ft/NM at some distance out, maybe 10 or 20 miles, but
the FAA has not got around to doing the required survey to arrive at a
specified departure gradient requirement so they just declare it NA
until someday they get around to it. I believe that you have to be
able to have obstacle clearance with 200 ft/NM out to 22 NM from the
runway before you have to have a specified gradient other than default,
which gets you to 4400 HAA.

John