Montalto Di Castro Airfield

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Montalto Di Castro Airfield is an abandoned World War II military airfield in Italy, located approximately 16 km southwest of Canino, in the province of Viterbo (northern Lazio) in the internal part of Maremma Laziale, 90 km north-northwest of Rome.It was an all-weather temporary field built by the United States Army Air Force XII Engineer Command using a graded earth compacted surface, with a prefabricated hessian (burlap) surfacing known as PHS.

PHS was made of an asphalt-impregnated jute which was rolled out over the compacted surface over a square mesh track (SMT) grid of wire joined in 3-inch squares.