is it done in any other country?
Yes, Australia and New Zealand
Hydraulic mining
Hydraulic mining was also used during the Australian gold rushes where it was called hydraulic sluicing. One notable location was at the Oriental Claims near Omeo in Victoria where it was used between the 1850s and early 1900s, with abundant evidence of the damage still being visible today.

Hydraulic mining was used extensively in the Central Otago Gold Rush that took place in the 1860s in the South Island of New Zealand, where it was also known as "sluicing".
what is the time period of the middle ages? 5th to the late 15th century which was the most powerful empire of the time? The Roman Empire which religion spread during this time period? Islam was any civilization destroyed during this time? UNANSWERABLE what was the language commonly spoken in the empire mentioned above? Latin what was the status of women in that civilization? Freeborn Roman women were considered citizens but did not vote, hold political office, or serve in the military. what sort of mining was done there? Hydraulic mining
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Hydraulic mining [SEP] Beyond California
Although often associated with California due to its adoption and widespread use there, the technology was exported widely, to Oregon (Jacksonville in 1856), Colorado (Clear Creek, Central City and Breckenridge in 1860), Montana (Bannack in 1865), Arizona (Lynx Creek in 1868), Idaho (Idaho City in 1863), South Dakota (Deadwood in 1876), Alaska (Fairbanks in 1920), British Columbia (Canada), and overseas. It was used extensively in Dahlonega, Georgia and continues to be used in developing nations, often with devastating environmental consequences. The devastation caused by this method of mining caused Edwin Carter, the "Log Cabin Naturalist", to switch from mining to collecting wildlife specimens from 1875–1900 in Breckenridge, Colorado, US.