Tunnel Construction

AIR provides the following codes for tunnel construction:

  While Coverage C (content) is not supported for most of the 200-series construction class codes, it is, supported for Inland Transit (construction code 259) and for some other construction codes, such as tanks and pipelines. For the full list of supported combinations, refer to the "Const. & Occ. Combin." tab in each model supplement.

 

Construction Code


Category


Description

213

Alluvium Tunnels

Tunnels that were drilled through unconsolidated sedimentary deposits and then typically lined with concrete

For exposures in South America, use 2131.

214

Rock Tunnels

Rock tunnels are lined or unlined tunnels that were drilled through rock.

For exposures in South America, use 2141.

215

Cut and Cover Tunnels

Tunnels that were constructed by cutting a trench, installing a liner, and then covering the liner with earth

2131

Alluvium Tunnels

Lined or unlined alluvium tunnels with unknown method of construction

Valid only for South America and Southeast Asia, and the United States.

2132

Alluvial Bored Tunnels

Lined or unlined tunnels constructed through alluvium soil using a boring machine

Valid only for South America and Southeast Asia, and the United States.

2141

Rock Tunnels

Lined or unlined rock tunnels with unknown method of construction

Valid only for South America and Southeast Asia, and the United States.

2142

Rock Bored Tunnels

Lined or unlined tunnels drilled through rock using a boring machine

Valid only for South America and Southeast Asia, and the United States.

2150

Unknown Tunnel

Lined or unlined tunnels with unknown material and unknown method of construction, or other tunnels that cannot be mapped to any of the other tunnel construction class codes

Valid only for South America and Southeast Asia, and the United States.

2151

Rock Cut and Cover Tunnels

Lined or unlined rock tunnels constructed after excavating a trench and roofing over with an overhead support system

Valid only for South America and Southeast Asia, and the United States.

2152

Alluvial Cut and Cover Tunnels

Lined or unlined alluvium tunnels constructed after excavating a trench and roofing over with an overhead support system

Valid only for South America and Southeast Asia, and the United States.

 

 


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Touchstone 5.0 Updated January 17, 2019