Union Pacific says its third-quarter profit rose 15 percent as price increases and more automotive and chemical shipments helped the railroad offset a drop in coal shipments. The railroad reported $1 billion in net income, or $2.19 per share. Union Pacific, based in Omaha, said Thursday that revenue grew 5 percent to $5.34 billion. Declining coal volumes has been a challenge for the major freight railroads all year. Union Pacific says its total shipment volume declined only slightly because of increases in automotive, chemical and intermodal shipments.