Google is keeping everyone guessing over mystery barge floating in San Francisco Bay

The search giant refuses to confirm it owns the four-storey structure

Four storeys tall, 250ft long and 72ft wide, there’s little doubt that Google’s latest idea is a big one.

The only problem: nobody knows what it is yet.

The mysterious structure, swaddled in scaffolding and floating on a vast barge in San Francisco Bay, is composed of shipping containers welded together, painted white with several narrow slits for windows and topped with 12 spires that may be antennae.

The waterborne monolith has been linked to Google, yet the search giant has refused to confirm it owns the structure or reveal its purpose.

The barge, which is generating feverish speculation in San Francisco and Silicon Valley, is registered to a Delaware firm, By and Large LLC.

The mystery deepened this week with the discovery of another,  near-identical barge 2,700 miles away on the east coast of the US, in Portland, Maine. This is said to have appeared in Portland’s harbour on 11 October and is also registered to By and Large.

Local media reports suggest a Maine-based company, Cianbro, has been making secret interior and electronics modifications to the structure. Cianbro would not provide any details of its client or the work, but revealed the barge is destined to leave Portland once it is completed. A comprehensive investigation of the San Francisco barge by the Cnet website determined its most likely purpose was as a massive, sea-going computer server. In 2009, Google was granted a patent for a “water-based data centre”.

Bob Jessup, a construction professional whose workplace is adjacent to the facility on Treasure Island in San Francisco Bay, where the structure was assembled, told Reuters the project had been underway for a year.

The area was fenced off, he said, while the shipping containers were outfitted with electronics equipment and then loaded on to the barge with a crane. He estimated that about 40 welders worked on the structure, but would not reveal any details.

“It was a phenomenal production,” Mr Jessup said. “None of them would tell  us anything.”

Over the weekend, the Bay Area news station Kpix reported that the barge might be a mobile store for a new line of high-tech eyewear, Google Glass, designed to travel from city to city via the coast and rivers.

The search giant is sufficiently concerned about keeping its latest venture a secret, however, so that even US government officials have been legally prevented from disclosing any details about the barges and their contents. At least one coast guard employee and an inspector for a California state government agency have signed non-disclosure agreements with Google.

VIDEO
Have you tried new the Independent Digital Edition iPad app?
Voices
For the Love of God (2007) The diamond-encrusted skull that divided the art world failed to sell for
its $100m asking price. It was eventually bought by a consortium
which included the artist himself.
voicesYou can shove it, Mr Webb – I'll be having fun until the day I die, says Janet Street-Porter
Sport
Mercedes driver Lewis Hamilton of Britain drives in the rain during the qualifying session of the Chinese Formula One Grand Prix in Shanghai
sport
Extras
indybestFake it with 10 best self-tanners
Arts & Entertainment
Madonna in her music video for 'Like A Virgin'
music... and other misheard song lyrics
News
Much of the colleges’ land is off-limits to locals in Cambridge, with tight security
educationAnd has the Cambridge I knew turned its back on me?
Sport
Steven Gerrard had to be talked into adopting a deeper role by his manager, Brendan Rodgers
sportThe city’s fight for justice after Hillsborough is embodied in Steven Gerrard, who's poised to lead his club to a remarkable triumph
News
peopleOrlando Bloom the pin-up hero is making a fresh start
News
Who makes you happy?
happy listSend your nominations now for the Independent on Sunday Happy List
Life & Style
The North Korean TV advert for Taedonggang beer, that became a YouTube hit
food + drinkAnd what did it take to set up a taste test back in Wiltshire?
Arts & Entertainment
filmLife for Leslie Mann's can be challenging sometimes
Voices
For music lovers: John Cusack with his vinyl collection in 'High Fidelity'
voices...but don't forget rest of the year
News
The energy drink MosKa was banned for containing a heavy dose of the popular erectile dysfunction Levitra
news
Independent
Travel Shop
the manor
Up to 70% off luxury travel
on city breaks Find out more
santorini
Up to 70% off luxury travel
on chic beach resorts Find out more
sardina foodie
Up to 70% off luxury travel
on country retreats Find out more
Have you tried new the Independent Digital Edition iPad app?
Independent Dating
and  

By clicking 'Search' you
are agreeing to our
Terms of Use.

iJobs Job Widget
iJobs General

Apprentice IT Technician

£150.00 per week: QA Apprenticeships: This company is a company that specializ...

1st Line Technical Service Desk Analyst IT Apprentice

£153.75 per week: QA Apprenticeships: This company is an innovative outsourcin...

1st Line Helpdesk Engineer Apprentice

£150.00 per week: QA Apprenticeships: This company has been providing on site ...

Sales Associate Apprentice

£150.00 per week: QA Apprenticeships: We've been supplying best of breed peopl...

Day In a Page

How I brokered a peace deal with Robert Mugabe: Roy Agyemang reveals the delicate diplomacy needed to get Zimbabwe’s President to sit down with the BBC

How I brokered a peace deal with Robert Mugabe

Roy Agyemang reveals the delicate diplomacy needed to get Zimbabwe’s President to sit down with the BBC
Video of British Muslims dancing to Pharrell Williams's hit Happy attacked as 'sinful'

British Muslims's Happy video attacked as 'sinful'

The four-minute clip by Honesty Policy has had more than 300,000 hits on YouTube
Church of England-raised Michael Williams describes the unexpected joys in learning about his family's Jewish faith

Michael Williams: Do as I do, not as I pray

Church of England-raised Williams describes the unexpected joys in learning about his family's Jewish faith
A History of the First World War in 100 moments: A visit to the Front Line by the Prime Minister's wife

A History of the First World War in 100 moments

A visit to the Front Line by the Prime Minister's wife
Comedian Jenny Collier: 'Sexism I experienced on stand-up circuit should be extinct'

Jenny Collier: 'Sexism on stand-up circuit should be extinct'

The comedian's appearance at a show on the eve of International Women's Day was cancelled because they had "too many women" on the bill
Cannes Film Festival: Ken Loach and Mike Leigh to fight it out for the Palme d'Or

Cannes Film Festival

Ken Loach and Mike Leigh to fight it out for the Palme d'Or
The concept album makes surprise top ten return with neolithic opus from Jethro Tull's Ian Anderson

The concept album makes surprise top ten return

Neolithic opus from Jethro Tull's Ian Anderson is unexpected success
Lichen is the surprise new ingredient on fine-dining menus, thanks to our love of Scandinavian and Indian cuisines

Lichen is surprise new ingredient on fine-dining menus

Emily Jupp discovers how it can give a unique, smoky flavour to our cooking
10 best baking books

10 best baking books

Planning a spot of baking this bank holiday weekend? From old favourites to new releases, here’s ten cookbooks for you
Jury still out on Manchester City boss Manuel Pellegrini

Jury still out on Pellegrini

Draw with Sunderland raises questions over Manchester City manager's ability to motivate and unify his players
Ben Stokes: 'Punching lockers isn't way forward'

Ben Stokes: 'Punching lockers isn't way forward'

The all-rounder has been hailed as future star after Ashes debut but incident in Caribbean added to doubts about discipline. Jon Culley meets a man looking to control his emotions
Mark Johnston: First £1 million jackpot spurs him on

Mark Johnston: First £1 million jackpot spurs him on

The most prize money ever at an All-Weather race day is up for grabs at Lingfield on Friday, and the record-breaking trainer tells Jon Freeman how times have changed
Ricky Gervais: 'People are waiting for me to fail. If you think it's awful, then just don't watch it'

Ricky Gervais: 'People are waiting for me to fail'

As the second series of his divisive sitcom 'Derek' hits screens, the comedian tells James Rampton why he'll never bow to the critics who habitually circle his work
Mad Men series 7, TV review: The suits are still sharp, but Don Draper has lost his edge

Mad Men returns for a final fling

The suits are still sharp, but Don Draper has lost his edge
Google finds a lift into space will never get off the ground as there is no material strong enough for a cable from Earth into orbit

Google finds a lift into space will never get off the ground

Technology giant’s scientists say there is no material strong enough for a cable from Earth into orbit