Located on the edge of Allegheny National Forest, the address of the farmhouse is 115 North Hill Road. The freight company called Richardson Atlantic has railroad tracks that ran alongside the farm. The Daughtery family currently owns this farm and grew corn on the land as well as harvesting the hay. The farm has a main two-story house, a garage that houses the tractor and a barn that may have livestock in it.
CEDA initially setted an evacuation center up at this farm since it is the only building in the immediate area. However, once the military took over, they setted an outpost up at the farmhouse and designated it Evacuation Outpost Echo. It was used to provide passage to the northeastern safe zone (Or first to Millhaven). The soldiers putted the notice signs up telling the refugees that they are about to enter a military outpost zone and listen to the military personnel. However, the soldiers were killed by the Infected. Instead of the soldiers at Millhaven sending another squad or platoon to the farmhouse, they decided to play a tape loop over the radio and await to see if anyone answers.
The Survivors entered the farm by the small cliff near the Richardson Atlantic railroad tracks. Once they entered the cornfield, they startled a murder of crows which alerted the Horde. Once the Horde settles down, they headed towards the farmhouse and got ready to be rescued by the military. Once they informed the military about their position, Lt. Mora joins Rescue 9 in the armored personnel carrier to go and rescue the Survivors. Once they picked the Survivors up, Lt. Mora and Rescue 9 takes everyone to Millhaven.
The farmhouse and surrounding cornfield bore a strong resemblance to the family farm in the movie, Signs which also takes place in Pennsylvania.
While it's clear that Left 4 Dead is set in the United States, the APC seen in this map's campaign is based off a German-made TPz Fuchs, not an American one like the Cadillac Gage Commando for example. This is because it is possibly the U.S. Army's CBRN (Chemical, Biological, Radiological & Nuclear) Reconnaissance Vehicle, the M93 Fox.