WEBVTT

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To date, Nogales we are up to ninety-nine tunnels in Nogales itself.

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As far as types of tunnels, Tucson sector wide tunnel count is up to 104.

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There is the "rudimentary tunnel" which is hand dug,

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some can be short, some can be long.

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"No-shoring", just hand dug through the earth,

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self-sustaining with whatever soil they dig through.

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There's interconnecting tunnels which are tunnels that are dug to, between infrastructure,

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so between a sewage line or drainage line in Mexico,

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across the border to a sewage or drainage line in the United States.

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There's also sophisticated tunnels which comprise of shoring,

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ventilation, electrical lighting, and different mechanisms,

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they can be shored throughout, they can be shored in different parts,

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but they're, the tunnel is intended to be there for the long haul or longer duration.

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Some tunnels can be all three, some can be inter-connecting,

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have some sophisticated parts in them, and also be rudimentary.

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A lot of that is dictated by soil, it's to prevent cave-in and collapse.

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But the most common are in Nogales, where the hot spot is

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are usually interconnecting or rudimentary tunnels

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with some shoring in them based on soil types,

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but there have been some sophisticated tunnels found in this sector.