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Retsof is a hamlet within the town of York in Livingston County, New York, United States. The community, situated 26 miles (42 km) southwest of the city of Rochester, is off rt 63 about a mile east of rt 36
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Map of Retsof, NY 14533, USA
It was founded by a man named Foster who reversed the letters of his name to name the town and was the site of one of the world's largest salt mines until its collapse in 1994. A new mine, the Hampton Corners mine, is located near Mount Morris, about 10 miles (16 km) to the southeast.
The original population of Retsof was mostly of Italian origin; they lived in a company town where the salt mine owned the houses and a store and maintained the small village. The Italian families lived together with a few non Italians. The others who were mostly bosses lived on the 'Avenue' in nicer houses with indoor plumbing.
In addition to the salt mine, there was a small railroad—the Genesee and Wyoming Railroad (G&W)—that took the salt to the "Main Lines" in neighboring towns. The G&W remains active today as a branch line of the Rochester and Southern Railroad.
Retsof Salt Mine
In 1994, the Retsof Salt Mine was the largest salt mine in North America, and the second largest in the world. Three hundred people worked within the 6,000 acres (24 km2; 9.4 sq mi) of excavated space, 1,000 feet (300 m) below ground, extracting salt from a natural deposit for use as road salt, table salt, and in industry. In March 1994, however, the ceiling in one of the large underground chambers collapsed, the first of a series of effects caused by groundwater entering the salt deposit, which had been dry for all of the 110 previous years of mining at the site. Over the next 21 months, the mine cavities collapsed and filled with water. Mining operations scrambled to work the accessible areas before the spreading flood, until operations were suspended when the mine was fully filled with water, in 1995. The effect of filling all this space lowered the aquifer, leaving many drinking water wells dry, and led to surface subsidence, even sinkholes 200 feet (61 m) wide, damaging structures and highways. 8 feet (2.4 m) or 9 feet (2.7 m) of additional subsidence is expected to take place over the next century.
USGS studied effects of mine collapse on groundwater hydology.