In urban planning, timing is everything. Other visionaries had proposed spanning the Golden Gate long before Joseph Strauss laid out his scheme in 1919, but none of the early designs were feasible, either from an engineering or economic standpoint. When Strauss presented his plans to city officials, however, San Francisco was ready.

Sausalito, a small town across the bridge

Open Space and Traffic Jams
Sited on a peninsula dotted with steep hills, the city of San Francisco occupies a mere 47 square miles, almost completely surrounded by water. In contrast to San Francisco's congested streets, the isolated counties across the Golden Gate were rural and rather unpopulated. By 1910, San Franciscans were buying their first automobiles from entrepreneurs like Charles Howard (who would invest his new fortune in racehorses including the famous Seabiscuit). Beaches and amusement parks to the north became popular destinations. But the only way across the Gate was by ferry. On Sunday nights, the small Marin town of Sausalito was choked with traffic, as cars lined up to get back to the city.

Population Boom
At the same time, San Francisco's population was skyrocketing. It increased by more than 20 percent between 1910 and 1920, after the city rebuilt from a devastating earthquake and welcomed wartime workers. Into the 1920s, more citizens and a post-war economic boom fueled the city's desire to expand. City officials had improved the narrow peninsula with municipal projects including a complex sewer system, firefighting network, aqueduct system and streetcar transit system. It was soon clear that the city would need to expand its borders in order to thrive.

Promises of Wealth
To win support for his bridge, Strauss drove from town to town, trying to convince residents that a bridge would make their land more valuable, and facilitate tourist traffic. Strauss predicted immediate economic benefits -- an "empire of wealth" for the northern counties. Local boosters loved the plan. By the bridge's opening day, eight San Francisco counties -- San Francisco, Marin, Sonoma, Napa, Lake, Mendocino, Humboldt and Del Norte -- and Josephine County in Oregon would be touting themselves as "America's Newest National Playground," the "Redwood Empire."

Towns like Saulsalito experiences a population boom after the bridge was constructed

The Old Guard
Not everyone welcomed the bridge plan. Its opponents were known collectively as the "Old Guard." The Golden Gate Ferry Company feared the bridge would destroy its prospering business. San Francisco was one of the world's busiest ports, and shippers were concerned that bridge construction would slow down their trade. The federal War Department, which owned land on both sides of the Gate, was equally opposed to the bridge, assuming it would interfere with military operations. But city officials soon calculated that the city needed the bridge: increasingly crowded on the city peninsula, residents simply had to find somewhere else to go.

Physical Challenges
San Francisco's unique natural setting made bridge-building -- along with many other urban improvement projects -- a challenge. The devastating 1906 earthquake had set off uncontrollable fires that destroyed 28,000 buildings -- making more than two thirds of the city's population homeless. Once bitten, San Francisco residents were twice shy of a bridge that would sit just 12 miles west of the San Andreas Fault. In addition to earthquake threats, the bridge would have to withstand the strong currents that swirled through the Gate, and weather the passage's gale-force winds. Finally, the bridge needed to be high enough to accommodate ships traveling in and out of the city's busy port.

Fires from the 1906 earthquake

Connection
On May 27, 1937, after years of planning and labor, Joseph Strauss' dream of connecting crowded San Francisco to pastoral Marin County was finally realized. Californians enjoyed unfettered automobile access between the two shores. The hoped-for era of expansion and economic development was finally at hand.

Commuter Conduit
At first, the bridge seemed to be fulfilling this promise. The bridge became a commuter conduit -- an average of 9,073 cars passed over the bridge each day. Ferries were forced to cut their prices below the fifty-cent bridge toll in order to compete. The ferries struggled to steal back business from the glamorous span, but to no avail. On February 28, 1941, the Golden Gate Ferry service, which had operated since 1850, was cancelled.

Wartime
After the December 7, 1941, Japanese attack on Pearl Harbor, federal officials grew concerned that the Japanese would target San Francisco next. Buildings once used for the Golden Gate International Exposition were transformed into barracks, and the War Department took over most of the Marin shore. Planners dropped projects to expand residential areas north across the bridge, devoting time and resources to the war effort instead. The dream of urban expansion was placed on hold.

The attack on Pearl Harbor brought fear that San Francisco would be targeted

Down at the Heels
By war's end, San Francisco suffered from serious neglect. New development projects were in limbo and the city was faced with exploding population rates yet again. Many of the city's residential districts had devolved into slums. The Citizens' Postwar Planning Commission concluded, "San Francisco has become careless and allowed itself to run down at the heels. The situation is far from hopeless but it could become very serious in a surprisingly short time if the city does not correct its deficiencies and take advantage of the opportunities now knocking at its doors."

 

Postwar Boom
City officials initiated urban renewal, as many Americans sought suburban lifestyles. Beginning in the 1950s, the federal government added to the redevelopment impulse, supporting "Parks for the People." The War Department donated land to the state of California to be used as public parks and recreational space. The postwar baby boom brought increased traffic to the city -- and the Golden Gate Bridge. By the mid-Sixties, the bridge carried an average of 69,267 vehicles per day. To help traffic flow among all parts of the San Francisco Bay, planners revived the Golden Gate Ferry service in 1970, and built a subway system, the Bay Area Rapid Transit System, in 1972 to supplement the San Francisco-Oakland Bay Bridge in connecting San Francisco with the East Bay.

Green Space
Today, San Francisco remains one of America's most densely populated cities, and an average of 125,000 people commute into the city each day. Yet much of the north shore remains conservation land. The Golden Gate National Recreation Area is one of the largest urban national parks in the world, comprising 75,398 acres of spectacular landscapes and over two dozen miles of coastline, nearly two and a half times the size of San Francisco -- and just across the Golden Gate Bridge.

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From the Empire State Buiding to the carvings on Mount Rushmore, the Golden Gate Bridge, and the Space Needle, the U.S. has dozens of impressive, important, and iconic structures. Which ones have you been to? Which has had the biggest impact?