Digging up the Foundation of Sutro Tower

Rudolfo San Miguel
8 min readFeb 19, 2019

The Origins and History of San Francisco’s Sutro Tower

Sutro Tower has stood on top of Mount Sutro so long that it is hard remembering a time when it wasn’t there. I was born two months before its patriotic birthday on July 4th, 1973; so, for me, it has nearly always resided over the city. It has been celebrated and panned by locals and visitors alike. Herb Caen always had the best insults for the tower, such as “”I keep waiting for it to stalk down the hill and attack the Golden Gate Bridge” or visualizing it to a “giant erector set “ Fritz Leiber, in the opening of his novel Our Lady of Darkness, said “The TV tower — San Francisco’s Eiffel, you could call it — was broad-shouldered, slender-waited, and long-legged like a beautiful and stylish woman — or demigoddess.”

© Rudolfo San Miguel March ‎02, ‎2017

Whether you love it or hate it, Sutro Tower has become as much a part of San Francisco as the Golden Gate Bridge, the Transamerica Building, Coit Tower, the Castro, Mission District, Chinatown, Cable Cars, or bread-bowl clam chowder. It’s plastered on web banners and on T-shirts, iconifying everything San Francisco. There was a time thought, before 1973, when Mount Sutro wasn’t crowned with the orange and white pitchfork pointed towards the heavens. The legacy of the location that occupies the tower is just has rich as the history of the tower itself.

Its origins recede back as far as the lifetime of its namesake, Adolf Sutro. The German-born immigrant had entered the United States in 1860 at the age 20. He would make a fortune in the Comstock Lode, a deposit of silver ore under the eastern slope of Mount Davidson, Nevada. Still working as a merchant when he heard about the silver deposit, Sutro moved to Virginia City in Nevada with his education in engineering and designed a four-mile long tunnel, the Sutro Tunnel, which he oversaw the construction.

© Ed Biermann (Cliff House, 1907)

The tunnel was designed by “Crazy Sutro” to remove water and heat, which was stalling miners within the bowls of Mount Davidson. Because of his work and ingenuity, Sutro became rich and would settle in San Francisco, where became one of the city’s most famous benefactors and patrons. Even now, the name Sutro commonly appears throughout the city. The gifts he left the city are numerous and varied. Here are some of the bequests he left for the city of Saint Francis:

· The 3rd Cliff House, which was designed to look like a French chateau; offering dining, dancing, and entertainment. It was 8 stories high, had four spires, and an observation tower that stood 200 feet above sea level. It sadly burnt down in 1907.

· Sutro Baths, which opened in 1896, near the Cliff house and next rock cover. Sutro designed the baths himself with a system whereby water was circulated into the pools from the ocean directly, heated, and then sent back to the Pacific. It was destroyed in a fire in 1966.

· Sutro Heights Park, which overlooked the Pacific Ocean and was a variety of different foliage — Monterey cypress, eucalyptus, and palm trees.

· Sutro Library, which are the remains of Sutro’s vast private library of 100,000 books that is now located at San Francisco State University.

Sutro also was responsible for provide the land in which the campus of UCSF was built on and instituted protection to seals and Seal Rocks — small islands of rock formations in the Lands’ End area of the Outer Richmond District in western San Francisco — in the city and county while mayor of San Francisco. Most importantly, he bought the land around Mount Sutro and planted a forest of Eucalyptus trees that would be eventually the home to Sutro Tower.

The story continues decades later with Sutro’s grandson, Adolf Gilbert Sutro. Not as an industrious as his grandfather, Adolf Gilbert would have made his own contribution to San Francisco, while paving the way towards the origins of the tower that bears his family’s name.

Adolfo Gilbert received his education at Santa Clara College but would later work as a mechanic for the Wright Brothers. An early advocate for aeronautics and flying, he would receive the first ever pilot’s license for hydro-planes in the United State, which he would proudly carry with him — License №1. The year he received the license, Adolf Gilbert would fly over the Bay and set a world’s record. This would eventually lead him to run the Sutro Hydro School in the Marina. He would become a broker while managing the Sutro Baths, built and designed by his grandfather. He also wrote articles for Boating Magazine and other publications. Eventually, his part in this story was begin when he decided to build a mansion in the center of Mount Sutro that his father acquired.

The mansion, a home Adolf Gilbert would call “La Avanzada,” was built in the 1930’s for what was believed to $250,000. The Sutro family lived there for 18 years. The home was a spare no expense villa designed to suit Adolf’s eccentric tastes. In an article written by the Oakland Tribune in 1969, the home was described as something akin to a mystery novel:

The three story villa, La Avanzada, of dun colored stucco, as turrets and bays and its iron-banded, double front doors recessed and reached by a flight of stone steps across a stone terrace. Great boulders enhance the look of heavy permanence.

It has the look of a settina Helen Maclnnes or Mary Stewart suspense story (“little did I know when the big door swung open…”) Indeed when the door does wing open it is literally an their story.

The big, unusual rooms, wood beamed, tile and stained glass-ornamented, where fire lace flames should warm walls of books and men and women deep in conversation, are bare of conventional furniture…

…Imagination could have a splendid time making this an eerie background for thrills and excitement — especially on a dark night with the wind whipping the tall eucalyptus trees and fog curling up the hill to blot out the lights below.

It is sinister? Or is it only a strange lonely house on a mountain top? Who was its fascinating builder? Why did he leave it? Why is it to be torn down? Why is it filled with unusual equipment?

The mystery will unravel

The home was literally a mansion on the hill and fittingly resided over the city of San Francisco, crowning the tallest site in the city. As time passed, Adolf Gilbert, who reside in the mansion with his mother, would look elsewhere for a home, moving the both of them in 1948 near San Diego at San Luis Key. Adolf decided to sell the house.

photos by permission, courtesy Sutro Tower Inc.

The new owners were ABC television, who bought the mansion as the studio and broadcast station for their local affiliate, KGO-TV. Two years later KPIX, the CBS affiliate, would join them. During this period, the ambiance of the mansion would migrate into something more bizarre and techy, as both stations with would transfer the villa on the hill into a broadcasting facilities, along with a much smaller TV tower constructed over the mansion as mentioned in the Tribune article:

…the house is loaded with highly technical electronic equipment.

In the basement, men work at panels in a room filled with cabinets. A huge fireplace incorporating fossil specimens hidden by a tool panel. Half the big living room is divided by aural and visual amplifiers. Acoustical tile blocks out the orange and blue pan ls that ornament the ceiling

KGO would move out of the house in 1953 to their current location at 277 Golden Gate Avenue, followed by KPIX. La Avenzada was abandoned aside from a skeleton crew that manned the TV Tower, which provide television signal for the city and surrounding area. The location became targets for intruders and vandals. In 1956 the television stations in the Bayarea decided they need a tower with more signaled, which lead to the final days of the Sutro mansion.

© Rudolfo San Miguel March ‎02, ‎2017

Originally, two locations were being considered for the new tower. Because of the unique geography of San Francisco with its large hills, the tower was only suitable for both locations. One location was San Bruno Mountain and the other was Mount Sutro. Eventually, Mount Sutro was chosen after the FCC disqualified San Bruno due to its location close to the airport.

With the site selected, a new company was formed named Sutro Tower Inc through joint ownership by ABC, The San Francisco Chronicle, Westinghouse, Cox Broadcast and Metromedia for Channels KGO-TV, KRON, KPIX, KTVU and KNEW-TV. Neil Smith and Associate were commissioned to build the tower.

This was the death sentence for La Avanzada. Through agreement with the city, Sutro Tower Inc would remove the mansion due to the condition of the villa. The city condemned the building as a fire trap and target for vandalism.

The sad passing of this eccentric and wonderful San Francisco home would give way to the even more bizarre, often reviled, and industrial icon of San Francisco.

Sutro Tower stands 977 feet high. Its highest antenna is 1,811 feet above sea level. The tower weighs 3.5 million pounds. According to SutroTower.com, it is used by “Eleven television stations, four FM radio stations and 20 wireless and mobile communications users (i.e. law enforcement agencies, taxi cabs, school buses, wireless internet, etc.).” In 2009, the tower began the process of broadcasting signal for digital television.

(C) Rudolfo San Miguel March ‎02, ‎2017

The legacy of the name and landscape surrounding Sutro Tower is complicated and rooted in the origins of the city. To understand this tower is to understand the history of San Francisco, from Adolf Sutro’s philanthropy to broadcasting imperium that is Sutro Tower Inc. Above all this history, both bizarre and mundane, dwells the Tower. Looming above the fog, casting shadows down the slopes of Mount Sutro and surrounding neighborhood, and molding its visage over the entire city; Sutro Tower remains an icon for San Francisco over multiple generations who still wait for it to begin its stalking march towards the Golden Gate.

Further Reading

· Sutro Tower History

· Stature of Sutro Tower rises

· Sutro Tower

· From Whale Mansion To Mega Tower

· Sutro Tower to Replace Historic Mountain Villa

· Stranger than Fiction: Adolph Sutro’s Spectacular San Francisco Lives On

· History (Sutro Tower)

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