Status: Dead (2014; last barge scrapped 2016). The famous "floating datacenter" that never was — the barges were retail showrooms, and the actual floating-datacenter concept behind the speculation was never built. Still instructive: it's the cleanest case study of maritime regulation killing an ocean project.
Google filed a "Water-Based Data Center" patent in Feb 2007 (granted 2009, US7525207B2): floating datacenters 3–7 miles offshore, powered by wave-energy converters, cooled by seawater heat exchangers, ~40 MW, no real estate or property taxes, movable to demand (disaster relief, military). Never built by anyone at Google. The patent is the only reason the world assumed the 2013 mystery barges were datacenters.
Four oceangoing barges (built 2010–2012 in Louisiana), leased through shell entity "By and Large LLC" ($80K/month for 727,000 sq ft at Treasure Island, SF). Two got 4-story shipping-container superstructures — one in SF Bay, one in Portland, Maine. Per WSJ-FOIA'd documents and Google's lone official statement, they were invitation-only interactive showrooms for Google Glass and Google X products — "an interactive space where people can learn about new technology," with plans for a dozen sails and "nautical whimsy."
Even a non-datacenter, low-risk use of a barge in a US harbor drew two separate regulatory kill shots (Coast Guard fire code, state bay-conservation permitting). Any US coastal/floating compute pitch needs a real answer on maritime permitting — this is the graveyard's clearest evidence that the hard part is not the technology.
Patent US7525207B2 · TechCrunch "Abandon Ship" (WSJ FOIA reporting) · Time on the fire-safety documents · NBC: BCDC orders barge moved · TechCrunch: Maine barge scrapped · Wikipedia: Google barges (hull registry, disposition)