SAN FRANCISCO — The board controlling the Golden Gate Bridge unanimously rejected proposals on Friday to help finance the span with money from corporate sponsors.

"The board members felt it would generate a lot of controversy compared to a limited amount of money," said Kellee Hopper, marketing director for the district.

Directors of the Golden Gate Bridge, Highway and Transportation District killed three proposals, including one that would have allowed corporations to display their logos on property adjacent to the sweeping orange bridge. But none of the plans would have permitted corporate marquees or mascots on the span or towers.

"We understood they weren't proposing a billboard across the bridge," said Marcie Keever, the program director for San Francisco Beautiful, a nonprofit group. "But we felt corporate advertisements or logos anywhere around the Golden Gate would degrade the public space."

Supporters argued corporate partnerships would eventually generate $3 million to $4 million annually, making at least some contribution toward the bridge's operating budget of $150 million and chipping away at its projected deficit of $81 million over the next five years.