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What is the tallest tower (in terms of AGL) identified on a sectional chart within the Class-E-to-surface airspace surrounding an airport in the US?

For the purpose of the question, "within the Class-E-to-surface airspace surrounding an airport" means within the part of the sectional chart that lies within a dashed magenta line that completely encloses the airport and is not separated from the airport by another dashed magenta or blue line. I.e. not including within Class-E-to-surface "extensions" that are separate from the Class-E-to-surface that actually surrounds the airport.

For simplicity, let's NOT include Class D or higher that reverts to Class-E-to-surface at night, etc.

"Tower" means any type of structure-- radio antennae, whatever-- that is depicted on the sectional chart with a tower symbol and has the AGL elevation of the top of the tower identified on the sectional chart.

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  • $\begingroup$ Define "surrounding an airport". Are we talking 200 feet or 20 miles? $\endgroup$ – FreeMan Oct 12 '18 at 17:48
  • $\begingroup$ within the dashed magenta line-- I will clarify $\endgroup$ – quiet flyer Oct 12 '18 at 17:51
  • $\begingroup$ I'm confused. If there is a control tower (with only minor exceptions) the airspace would be Class D (when the twr is operating). All of these locations (as far as I can tell) revert to class E when the twr is closed. Or are you talking about any type of tower/structure (not necessarily a control tower)? $\endgroup$ – 757toga Oct 12 '18 at 17:55
  • $\begingroup$ any type of tower. I will clarify $\endgroup$ – quiet flyer Oct 12 '18 at 17:56
  • $\begingroup$ The control tower at KPHX is 321 feet agl. But that is in Class B. Confirm you only want towers in surface areas designated as Class E? $\endgroup$ – 757toga Oct 12 '18 at 18:00
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Winslow-Lindbergh Airport (Arizona): Tower east of the airport is 356 feet agl.

enter image description here

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  • $\begingroup$ Looks like that might be just outside the edge but lets go for 700' AGL now. $\endgroup$ – quiet flyer Oct 12 '18 at 18:09
  • $\begingroup$ I looked at the zoom wrong, probably is inside the edge, but let's go for 700' AGL now $\endgroup$ – quiet flyer Oct 12 '18 at 18:24
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The airport KLBL has a tower marked as 505 AGL. And another, just barely outside the space at 520 AGL.

That is the highest I've been able to locate.

KLBL Obstruction

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  • $\begingroup$ This seems to be the highest we've found to date. $\endgroup$ – quiet flyer Oct 15 '18 at 16:49

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