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The first walls around Apple’s Campus 2 have begun to take shape, as noted by KCBS reporter Ron Cervi, in a tweet today. Previously, more photos from KCBS showed the site’s considerable excavation under way, and earlier photos from March detailed the demolition work of the former HP campus on the site, which was almost complete at that time.

Demolition on the site began in February, after a lengthy approval process starting with a presentation by Steve Jobs back in July of 2011, which first detailed the specifics of the campus. Since then, we’ve seen a considerable amount of renders of the campus, a scale model of the site which is on display at Apple’s current headquarters, and even a life-size mockup of part of the building.

In October of last year, Apple was given the go ahead on the project by the Cupertino City Council, which is estimated to be about $2 billion over budget, and in November received the final set of building permits. The project itself is estimated to be completed in 2016, after some setbacks.

Today Apple also permanently closed off Pruneridge Avenue for construction, a road that runs directly through the Campus site.

Right now, the road looks more like a wasteland, a far cry from the tree filled space the campus will occupy when completed:

We’ve collected more aerial shots and photos of the campus taking shape below.