Great Diesel Sound of Revving Engines! Two EMD SD402's, Union Pacific 3320 & 3723, with EMD 645 Prime Movers, Accelerate From Stop at Full Power with A Heavy Manifest Freight, while setting out and picking up cars at the yard just North of Downtown Idaho Falls, Idaho. EMD SD402 3320 is called a " Snoot" or a "Fast Forty", with a long short nose. A limited number were built for Union Pacific by EMD, and were geared for 80 mph, which meant they lead UP's Fastest Trains at One Time. Idaho Falls Idaho February 2011.