A golden spike will again be driven home Sunday in re-enactments of the event 129 years ago marking completion of the transcontinental railroad at Promontory Summit, north of the Great Salt Lake and about 32 miles west of Brigham City.

Sen. Orrin Hatch and Rep. Jim Hansen, both R-Utah, will head dignitaries participating in the 47th annual Golden Spike Celebration. The ceremony commemorates the original "wedding of the rails" on May 10, 1869, linking the eastbound Central Pacific Railroad project with the westbound Union Pacific.A re-creation of the famed "champagne" photograph of that event will begin at 10 a.m. Sunday, said Rick Wilson, chief ranger. Those wishing to participate should wear 19th century-style clothing.

The primary program will begin 11:45 a.m., concluding with a re-enactment of the 1869 ceremony, which will be repeated at 3 p.m. Representatives from two Chinese delegations will memorialize the 12,000 Chinese who laid most of Central Pacific's rails.

Admission to the historic site will be free Sunday, and concession food will be available.