Photographs of the Skagit River Hydroelectric Project constructed between 1918-1961.
<p>Seattle City Light's North Substation was completed ca. 1924 and was located north of Green Lake at East 75th Street.
</p><p>Transmission buses are steel structure arrays of switches used to route power in a substation.
</p><p>Oil circuit breakers are used to switch circuits and equipment in and out of a system in a substation. They are oil filled to provide cooling and to prevent arcing when the switch is activated.
</p><p>Caption on image: 5240
</p><p>Caption below image: Arrangement H.T. Bus, No. Substation - 165KV line, 154 KV G-2 oil circuit breakers
</p><p>PH Coll 45.1-3
</p>
<ul><li>Subjects (LCSH): Electric substations--Washington (State); Electric power distribution--Washington (State); Electric lines--Poles and towers; Switching circuits</li></ul>
<div class="fn value">
Unknown author<span style="display: none;">Unknown author</span></div>
1924<div style="display: none;">date QS:P571,+1924-00-00T00:00:00Z/9</div>
<a rel="nofollow" class="external text" href="https://content.lib.washington.edu/ww-spwsweb/index.html">Seattle Power and Water Supply Collection</a>