 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? 
Western United States
Title: Philipsburg, Montana
Passage: 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.
Title: Philip Deidesheimer
Passage: Philip Deidesheimer was a mining engineer, active in the Western United States.
Title: North Johns, Alabama
Passage: 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.
Philip Deidesheimer Philipsburg, Montana