CSIS Satellite Imagery Shows Record Activity at Iran's Pickaxe Mountain Site
New CSIS analysis reveals that the Pickaxe Mountain complex near Natanz saw more road and construction activity in 2026 than at any point in its history. The findings suggest a shift from excavation to internal construction, sharpening concerns that Iran is hardening its nuclear infrastructure against potential strikes. This episode breaks down the satellite detective work used to infer what is happening deep underground.
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Satellite imagery shows road traffic at Pickaxe Mountain reached an all-time high in summer twenty twenty-six.
The facility sits under one hundred meters of rock to provide protection from aerial strikes.
Analysts use surface concrete plants and ventilation stacks to infer internal construction progress underground.
Recent activity indicates the site is transitioning from excavation to installing internal infrastructure and power systems.
The scale of the underground floor space suggests capacity for a full-scale enrichment hall.
Hardened tunnel portals and backfilled entrances are designed to create a permanent, survivable nuclear installation.
- 01Intro1 min
- 02The Twenty Twenty-Six Surge2 min
- 03Geography of a Buried Fortress2 min
- 04The Tradecraft of Inference3 min
- 05Strategic Stakes and Intelligence Gaps2 min
- 06Outro1 min
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