 Later in Avenal's history, the Post Office leased a space adjacent to Finster's Market (later T&T Market).In the late 1990s, the post office was relocated to its current location near the intersection of Skyline Blvd and San Joaquin Street.The collapse of oil and gas production came with the intrusion of salt water into the oil reservoir, leaving 65 to 70 percent of the North Dome of the Kettleman Hills still undisturbed.