Question: A town in and the county seat of Granite County, Montana, United States was named after a famous mining engineer, where was the engineer active?

Documents:
source: Philip Deidesheimer
text: Philip Deidesheimer Philip Deidesheimer was a mining engineer, active in the Western United States.

source: Philipsburg, Montana
text: Philipsburg, Montana Philipsburg is a town in and the county seat of Granite County, Montana, United States. The population was 820 at the 2010 census. The town was named after the famous mining engineer Philip Deidesheimer, who designed and supervised the construction of the ore smelter around which the town originally formed.

source: Gold Creek (Montana)
text: Gold Creek (Montana) Gold Creek is a creek in southwestern Montana, United States, on Interstate 90 northwest of Garrison, between Butte and Missoula. It flows through parts of Granite County and Powell County and empties into the Clark Fork (river) at the ghost town of Goldcreek , northwest of the town of Garrison.

source: Granite, Montana
text: Granite, Montana Granite is a ghost town in Granite County, Montana, United States, east of the town of Philipsburg. Granite thrived as a silver mining town in the 1890s, but is now completely deserted. The state of Montana maintains the mine superintendent's house and the ruins of the union hall as Granite Ghost Town State Park.

source: Hall, Montana
text: Hall, Montana Hall is an unincorporated community in Granite County, Montana, United States. Hall is located on Montana Highway 1 6.2 mi west-southwest of Drummond. The community has a post office with ZIP code 59837.

source: Maxville, Montana
text: Maxville, Montana Maxville is an unincorporated community and census-designated place in Granite County, Montana, United States. Its population was 130 as of the 2010 census. Montana Highway 1 passes through the community.

source: North Johns, Alabama
text: North Johns, Alabama North Johns is the second smallest incorporated town in Jefferson County, Alabama (after Cardiff), United States. It is located approximately eight miles southwest from the Birmingham suburb of Hueytown. North Johns was a thriving mining town at the beginning of the 20th century, when more than 2000 people lived in and around the community. It is named after a Welsh-born mining engineer, Llewellyn Johns, who opened coal mining operations throughout the area in the 1880s. At the 2010 census the population was 145, an increase of three persons from 2000.

source: Garnet, Montana
text: Garnet, Montana Garnet is a ghost town in Granite County, Montana, United States. Located on the dirt Garnet Range Road, it is an abandoned mining town that dates from the 1860s. In First Chance Gulch in western Montana, the town is located 11 miles up the Garnet Range Road, in mountains and forest. The town is at about 6000 ft elevation.

source: Florence, Idaho
text: Florence, Idaho Florence is a ghost town in Idaho County, Idaho, United States. About 14 air miles (22 km) east-northeast of present-day Riggins in remote north central Idaho at an elevation of 6080 ft . It was settled as a mining camp in the winter of 1861. Almost concurrent with its settlement, Washington Territory established Idaho County on December 20, 1861 in anticipation of a gold rush that brought over 9,000 residents within the first year., The town quickly became the seat with the first district court taking place at Florence on 22 September 1862. While the rich placer gold fields in the Florence Basin brought thousands of prospectors and contributed to the establishment of Idaho Territory in 1863, the rush to Florence was short-lived as intensive mining depleted the richest ground. At the first census of Idaho Territory, only 575 residents remained. By the territorial census of 1864, the population dwindled further to 254 residents. Even in its decline, Florence continued as the county seat until 1 June 1869 when the territorial legislature moved the county seat to the Warren's Camp settlement of Washington. The town thrived again from 1895–1900, based more on lode mining. Then the town slowly faded away, having only ten inhabitants in 1940, and was totally abandoned sometime after 1951.

source: Granite County, Montana
text: Granite County, Montana Granite County is a county located in the U.S. state of Montana. As of the 2010 census, the population was 3,079. Its county seat is Philipsburg. The county was founded in 1893 and named for a mountain which contains the Granite Mountain silver mine.

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Answer: Western United States