By the 1910s, electricity from Seattle City Light powered homes and businesses as well as the streetlights and trolleys. This 1917 photo shows Seattle City Light "Underground Service" truck No. 29, with an workman at the wheel.
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Unknown author<span style="display: none;">Unknown author</span></div>
Taken on 21 September 1917
<a rel="nofollow" class="external text" href="https://digitalcollections.lib.washington.edu/digital/collection/imlsmohai/search">Museum of History and Industry</a>