Question: State Route 209 (SR-209) is a state highway in the U.S. state of Utah, following 9000 South and other east–west streets south of Salt Lake City, It connects I-15 in Sandy with the ski areas of Little Cottonwood Canyon, and, once an extension is complete, with which mine, more commonly known as Kennecott Copper Mine among locals, is an open-pit mining operation extracting a large porphyry copper deposit southwest of Salt Lake City, Utah?
Sentence (from "Bingham Canyon Mine"): The mine has been in production since 1906, and has resulted in the creation of a pit over 0.6 mi deep, 2.5 mi wide, and covering 1,900 acre .
Relevant evidence: No