Storage Dimensions?

Believe it or not, I hadn't accurately measured the dimensions of the bunker until today. I'm posting a cross-sectional diagram, together with a scale MX5 / Eunos / Miata in there for the Pistonheads! After all, there is a roadway leading down into it underneath all those rocks !

So, the tunnel itself is 120 inches (10 feet) wide at the entrance (measured between the concrete base walls), tapering in slightly to around 115 inches wide at the rear. Its 96 inches (8 feet) high to the centre of the ceiling arch, and slightly lower at the rear (the floor slopes to the entrance, presumably for drainage).

Lengthwise it is 60 feet (easy accommodation for 4 Miata!).