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Rail company saw strong growth in domestic intermodal.
Agency is also planning a February discussion of environmental issues at ports.
Permit allows waiver from emission control area requirement as scrubbers installed.
Top executives described initiatives to improve flow of cargo off docks at the nation's two largest ports during the TPM conference in Long Beach.
Vote ended a two-month skirmish over Obama immigration policy and spared agencies like CBP from cutbacks.
Environmental advantages of liquid natural gas remain undisputed despite a lack of profitability, according to the commission.