coal and generates more electricity than it consumes. The state has the potential to generate 31.6 TWh/year from 13.1 GW of wind power, and 10,290 TWh/year from solar power using 4,048 GW of photovoltaic (PV), including 5.6 GW of rooftop photovoltaic, and 1,638 GW of concentrated solar power. The Blue Castle Project is working toward building the state's first nuclear power plant near Green River, Utah. It is projected to be completed in 2030. Transportation Road I-15 and I-80 are the main interstate highways in the state, where they intersect and briefly merge near downtown Salt Lake City. I-15 traverses the state north-to-south, entering from Arizona near St. George, paralleling the Wasatch Front, and crossing into Idaho near Portage. I-80 spans northern Utah east-to-west, entering from Nevada at Wendover, crossing the Wasatch Mountains east of Salt Lake City, and entering Wyoming near Evanston. I-84 West enters from Idaho near Snowville (from Boise) and merges with I-15 from Tremonton to Ogden, then heads southeast through the Wasatch Mountains before terminating at I-80 near Echo Junction. I-70 splits from I-15 at Cove Fort in central Utah and heads east through mountains and rugged desert terrain, providing quick access to the many national parks and national monuments of southern Utah, and has been noted for its beauty. The stretch from Salina to Green River is the country's longest stretch of interstate without services and, when completed in 1970, was the longest stretch of entirely new highway constructed in the U.S. since the Alaska Highway was completed in 1943. Rail and transit Utah's Class I freight railroads are the BNSF Railway and the Union Pacific Railway. Interstate passenger rail is provided by Amtrak's daily California Zephyr train, which runs between Chicago Union Station and Emeryville, California, with stops in Utah at , , , and the Salt Lake City Intermodal Hub. The state was previously served by Amtrak's Pioneer and Desert Wind trains. Heritage railroads include the Heber Valley Railroad and the Wild Kingdom Train. The Utah Transit Authority (UTA) operates public transport services throughout the Wasatch Front region. TRAX, the UTA's light rail system, consists of three lines. The Blue Line (formerly Salt Lake/Sandy Line) begins in the suburb of Draper and ends in Downtown Salt Lake City. The Red Line (Mid-Jordan/University Line) begins in the Daybreak Community of South Jordan, a southwestern valley suburb, and ends at the University of Utah. The