Nothing is known about this location prior to the apocalypse.
Maggie tells the rest of the expedition group that they must reach Arbor Hills soon as that is a supply cache that was set up by Georgie for anyone who was part of her group who were in need of supplies within the Washington, D.C. area.
Daryl looks at the satalite tower that's located at Arbor Hills from a distance after the attack by the Reapers from the previous night. He begins to go towards it before he is stopped by Leah and taken captive by her group.
At the satellite outpost, Maggie and Negan arrive to find that nobody else regrouped there. Maggie promises that the rest of them will come in time, but Negan is skeptical, saying that if the rest don't arrive by sundown, they aren't coming. Later, as Negan prepares to give up and go home, Maggie aggressively stops him, before Gabriel arrives with Elijah. They decide to wait for Daryl and Frost to regroup with them.
Daryl, Leah, Carver, and a crew of Reapers approach the supply depot. When the search party arrives at the yellow house, Daryl finds Maggie, Negan, Gabriel, and Elijah hiding in a secret door in the floor underneath a carpet. He keeps quiet for their safety, but when they find the house empty, Carver insists they're missing something but Daryl insists that they're not. Carver questions where Daryl's loyalties lie, but Leah proposes they check the remaining houses in the town. Carver then steps on the hidden door, and upon lifting up the carpet, it is empty. They then leave to search the other houses. Carver notices the trap door and opens it. The basement is empty. Maggie's group quietly sneaks out of the basement and escapes.