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Dyson Lane Bridge

Plumas County, California

Photos 

Dyson Lane Bridge

Looking West

Photo taken by Craig Philpott in August 2010

Enlarge

BH Photo #174016

Map 

Description 

Single lane Pratt through truss main span with Pratt pony truss approach spans.

Facts 

Overview
Through truss bridge over Middle Fork Feather River on Dyson Lane
Location
Plumas County, California
Status
Open to traffic
Future prospects
To be repainted.
History
Built 1908
Builders
- Cambria Steel Co. of Johnstown, Pennsylvania (Iron/Steel Manufacturer)
- Canton Bridge Co. of Canton, Ohio (Builders)
Design
Pratt pin connected through truss main span with two Pratt pony truss spans on East approach and one Pratt pony truss span on West approach.
Dimensions
Length of largest span: 100.0 ft.
Total length: 285.0 ft.
Deck width: 12.0 ft.
Vertical clearance above deck: 14.8 ft.
Recognition
Eligible for the National Register of Historic Places
Also called
Marble Hot Springs Road Bridge
Marble Lane Bridge
Approximate latitude, longitude
+39.76278, -120.33647   (decimal degrees)
39°45'46" N, 120°20'11" W   (degrees°minutes'seconds")
Approximate UTM coordinates
10/728158/4404821 (zone/easting/northing)
Quadrangle map:
Reconnaissance Peak
Elevation
4874 ft. above sea level
Average daily traffic (as of 2016)
40
Inventory numbers
CA 9C-1 (California bridge number)
CA 09C-1 (California bridge number)
BH 11263 (Bridgehunter.com ID)
Inspection report (as of September 2016)
Overall condition: Fair
Superstructure condition rating: Fair (5 out of 9)
Substructure condition rating: Fair (5 out of 9)
Deck condition rating: Fair (5 out of 9)
Sufficiency rating: 25.5 (out of 100)
View more at BridgeReports.com

Categories 

Built 1908 (629)
Built during 1900s (6,434)
California (2,146)
Cambria Steel Co. (21)
Canton Bridge Co. (179)
Corrugated deck (490)
Feather River (22)
NR-eligible (3,977)
One-lane traffic (7,486)
Open (36,957)
Owned by county (18,958)
 Pin-connected (3,491)
Plumas County, California (48)
Pony truss (15,161)
Pratt pony truss (3,223)
Pratt through truss (4,689)
Pratt truss (8,164)
Span length 100-125 feet (4,084)
Structurally deficient (18,104)
Through truss (13,146)
Total length 250-500 feet (4,704)
Truss (29,814)

Update Log 

  • June 11, 2016: Updated by Christopher Finigan: Added category "Pin-connected"
  • May 21, 2013: Updated by Nathan Holth: Bridge to be repainted.
  • August 24, 2010: Updated by Craig Philpott: refined design and added photos

Sources 

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Comments 

Dyson Lane Bridge
Posted April 20, 2017, by 1122334455 (edh4801 [dot] 27 [at] gmail [dot] com)

Bridge is currently underwater.

Dyson Lane Bridge
Posted October 25, 2015, by Erik Hoffman

Road is also called Marble Hot Springs Rd.