I-15 closed, Utah school in lockdown, due to standoff By Roxana Orellana The Salt Lake Tribune Published Feb 6, 2012 02:31PM MDT Drivers on southbound and northbound Interstate 15 are being detoured onto State Road 9 and State Road 17 due to a police standoff. Coral Canyon Elementary, located along the interstate, also has been put on lockdown because of the ongoing incident. A negotiator and ...