Omaha Public Power District hauled a 225-megawatt combustion turbine last night from a Gretna rail siding to its Turtle Creek power station at 168th & Fairview Road in Sarpy County. The natural gas turbine will help OPPD meet increasing energy demands. The 35-foot-long turbine weighs 560,000 pounds – equivalent to a Boeing 787 airplane at maximum capacity. It was built over the course of 20 months in Berlin, Germany, and traveled by barge to Houston and then by rail to Gretna, arriving last week.