The passage was long and wide, allowing a medium-sized truck to pass through. However, the entire underground construction seemed shoddy, with signs of hasty completion everywhere. Most of its lighting wires were exposed, and there was no basic decorative work done.
But from a security perspective, the bunker had been very thoroughly fortified.
The entire bunker extended along a corridor to either side, which was the inevitable result of the need for rapid construction, but the corridor wasn't straight. Instead, it meandered back and forth in an S shape. Then, at intervals along the bends of the S, there would be a blast-proof door—an essential feature of any underground fortification.
However, many blast-proof doors were only framed, some had been fitted with hydraulic switches, and others simply had spaces designated for future installation.