|South portal of Summit Tunnel, entering|
Burns Creek basin, c. 1882. (Bruce MacGregor)
|Construction of northern end of Summit Tunnel, c. 1879. (Bruce MacGregor)|
|Reconstruction of the north portal, 1892-1893. (Bruce MacGregor)|
|Nearly completed northern portal, 1893. (Bruce MacGregor)|
Repairmen inside the Summit Tunnel, probably after the 1906 Earthquake.
In April 1906, the San Francisco Earthquake utterly devastated the tunnel, cutting off service over the mountain. The 1893 portal was repaired but the narrow-gauge tracks were pulled up and replaced with new broad-gauge tracks.
|The Summit Tunnel in the 1910s or later with a velocipede and rider on the tracks. (Bruce MacGregor)|
The south portal was completely replaced in 1908 and a brick roof was installed that went 300 ft. deep into the tunnel from the south to help protect the tunnel in case of a natural gas explosion. That portion of the tunnel still exists today, as does the portal itself.
|The south portal of Summit Tunnel after 1908.|
|Summit Tunnel north portal in the autumn of 1937. (Courtesy Bruce McGregor)|
|Summit Tunnel north portal in April 1940 after abandonment papers had been filed. (Courtesy Bruce McGregor)|
|The heavily graffitied inside of the Summit Tunnel's north portal today. The rubble pile is directly behind me.|
|The north portal of Summit Tunnel today (Photo courtesy Brian Liddicot)|
|Here is a perspective shot of the collapsed north portal of Summit Tunnel. It is still quite high, but the floor has definitely move upward toward the ceiling over the past seventy years.|
|The now-unused spillway beside the tunnel entrance, covered in moss and lichen and in pieces.|
|Standing on top of the portal, looking down.|
|Summit Tunnel's south portal today. Overgrown but otherwise intact.|
|Summit Tunnel's south portal from the inside showing the brick ceiling and|
the distant glow of the entrance to the portal.