<p>On verso of image: G. N. Tunnel, Seattle. Material yard, north end.</p>
<ul><li>Subjects (LCSH): Tunnels--Washington (State)--Berne; Railroad construction &amp; maintenance--Washington (State)--Seattle; Railroad construction workers--Washington (State)--Seattle; Great Northern Railway Company (U.S.)</li></ul><hr>
This appears to be the North Portal of the tunnel.
<bdi><a href="https://en.wikipedia.org/wiki/en:Asahel_Curtis" class="extiw" title="w:en:Asahel Curtis"><span title="American photographer">Asahel Curtis</span></a>
</bdi>
<a rel="nofollow" class="external text" href="http://content.lib.washington.edu/transportationweb/index.html">Transportation Photographs Collection</a>