Nice job.
I'm confused why the FAA would basically take the area at the end (your pink area) and put that off limits. Wouldn't that be advisable for the airport to use as much runway as possible...it seems by taking away the pink area the FAA has actually shortened the runway.
"I'm confused why the FAA would basically take the area at the end (your pink area) and put that off limits."
From various articles and comments of other posters, I think the reason is that the FAA wanted to move the end of the runway farther away from the roadway (shown to the right in the picture). Apparently, that road now has a lot more traffic on it then when the airport was first built and the FAA now considers it a safety issue. At least the FAA also required LEX to extend the other end of the runway (shown in yellow in the pic) so that the runway would still be as long as it was.