The 1990 Douglas–Agua Prieta drug tunnel case was the discovery of a carefully concealed passage beneath the U.S.–Mexico border, used by the Sinaloa cartel to smuggle cocaine from Agua Prieta, Sonora, into Douglas, Arizona. In the book, the tunnel’s intricate design gives concrete form to Douglas’s border geography; its history also enters Linda May’s deliberations about settling nearby, but does not dissuade her from pursuing her homesteading plan.

Discovery and Route

In 1990, agents found a tunnel about 300 feet long running beneath the border. Its entrance was inside a house in Agua Prieta, cleverly hidden beneath a pool table. The passage crossed underground into Douglas, where it ended below a warehouse disguised as a truck-washing station. The account establishes the route and concealment, but does not detail how investigators located the tunnel or what happened to those operating it.

Concealment and Engineering

The entrance relied on an inconspicuous household fixture: turning on a water spigot activated a hydraulic lift, raising the pool table and the slab beneath it to uncover a ladder. The tunnel began three stories underground. At five feet high, it was fitted with air conditioning and electric lights, while a sump pump guarded against flooding. A trolley traveled its length on two metal tracks, connecting the concealed entry point to the Douglas end.

At the destination, a hoist-and-pulley system brought cocaine bundles up from the tunnel into the 2,000-square-foot warehouse. Workers then loaded the bundles onto waiting tractor-trailers. The disguised truck-washing business, underground rail, and mechanized lifting equipment made the operation a coordinated transport route rather than a simple passage across the border. The tunnel was nicknamed Cocaine Alley, and agents compared its elaborate construction to a spy film.

Douglas and the Border Setting

The case appears in an account of a town physically shaped by the international boundary. Near the Grand Theatre, Douglas ends at parallel fences and a cement-lined channel; beyond the border barrier lies Agua Prieta. The tunnel’s concealed route beneath that boundary offered a striking contrast to the visible fences above it. The episode makes the border both a mapped line and a space that people attempted to cross by means of hidden infrastructure.

Linda May’s Response and the Story’s Role

While researching Douglas, Linda encountered accounts of the town’s drug-smuggling problem and learned about the 1990 tunnel. She also read warnings that people who informed on traffickers had been killed. Linda treated that danger as a real concern but reasoned that she would avoid involvement with informants; the book leaves open whether she was reassuring herself, the narrator, or both. In any case, neither the tunnel’s history nor the broader concern about trafficking changed her intention to homestead in the area. The case thus functions not as a narrated law-enforcement confrontation, but as part of the local history Linda weighs while deciding whether Douglas can become home.