Grizzly Dome Tunnel

Photos 

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Grizzly dome tunnel West Portal Photo taken by Craig Philpott in March 2010 Enlarge

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Grizzly dome tunnel West Portal Photo taken by Craig Philpott in March 2010 Enlarge

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Grizzly dome tunnel West Portal Photo taken by Craig Philpott in March 2010 Enlarge

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Grizzly dome tunnel Photo taken by Craig Philpott in March 2010 Enlarge

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GrizzlyDomeTunnel Undated historical postcard Submitted by Craig Philpott

Map 

Street View 

Facts 

Overview

Tunnel under Grizzly Dome on State Route 70

Location

Plumas County, California

Status

Open to traffic

History

Built 1936

Design

Fourteen foot clearance hardrock tunnel

Dimensions

Span length: 390.1 ft.
Total length: 390.1 ft.
Vertical clearance above deck: 14 ft.

Approximate latitude, longitude

+39.86918, -121.37330   (decimal degrees)
39°52'09" N, 121°22'24" W   (degrees°minutes'seconds")

Approximate UTM coordinates

10/639122/4414503 (zone/easting/northing)

Elevation

1763 ft. above sea level

USGS topographic map

Soapstone Hill, CA

Inventory numbers

CA 09-1 (California bridge number)
BH 44347 (Bridgehunter.com ID)

Average daily traffic (as of 1997)

1,680

Categories 

Update Log 

• December 16, 2010: New Street View added by Kevin Pope
• October 31, 2010: New photo from Craig Philpott
• March 6, 2010: Updated by Craig Philpott: Added photos

Sources 

• Craig Philpott - cphilpott [at] puc [dot] edu
• Kevin Pope

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