Image: Cross section mount baker tunnel 3rd tube
Cross_section_mount_baker_tunnel_3rd_tube.png (274 × 265 pixels, file size: 41 KB, MIME type: image/png)
Description: Cross section Stacked Drift Mt Baker Tunnel, I-90, Seattle, WA
Title: Cross section mount baker tunnel 3rd tube
Credit: Technical Manual for Design and Construction of Road Tunnels
Author: Federal Highway Administration (FHWA)
Usage Terms: Public domain
License: Public domain
Attribution Required?: No
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