Speed limits in the United States by jurisdiction 2013) to place more zones on rural parts of I-15, I-80 and I-84. The areas under consideration, UDOT spokesman said, are on I-80 from Grantsville (exit 99) to Wendover, on the Utah-Nevada border; I-84 from Tremonton to the Utah-Idaho border; I-15 from Brigham City (North interchange) to the Utah-Idaho border; and I-15 from Santaquin to North Leeds." The speed limit on these sections has been increased from 80 mph as of September 17, 2013. On February 13, 2014, UDOT voted to increase the speed limit on I-80 from Salt Lake City across the Bonneville Salt Flats to the Nevada border
Harkers Canyon (Salt Lake County, Utah) Harkers Canyon (Salt Lake County, Utah) Harkers Canyon is located west-southwest of downtown Salt Lake City, in Salt Lake County, Utah, USA. The canyon empties into the Salt Lake Valley from its origin in the Oquirrh Mountains. The canyon is oriented primarily from southwest to northeast, with the middle third of the canyon descending from west to east. Harkers Canyon and surrounding land are owned and managed by the Kennecott Utah Copper Corporation and has been mined for copper. Although most extraction occurred in Bingham Canyon to the south, Harkers Canyon has been the site of copper mining by the