Historic Bridges
of the United States
Old Sonoma Road Bridge
Napa County
,
California
Overview
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Terraserver USA
Facts
Overview
Stone arch bridge over Carneros Creek on Old Sonoma Road in Napa
Location
Napa
,
Napa County
,
California
Status
Open to traffic
History
Built 1896; rehabilitated 1914
Design
Stone arch
Dimensions
Length of largest span: 30.5 ft.
Total length: 35.1 ft.
Deck width: 24.6 ft.
Recognition
Eligible for the National Register of Historic Places
Approximate latitude, longitude
+38.25694, -122.34000
(decimal degrees)
38°15'25" N, 122°20'24" W
(degrees°minutes'seconds")
Approximate UTM coordinates
10/557743/4234530
(zone/easting/northing)
USGS topographic map
Napa
Inventory numbers
CA 21C-17
(California bridge number)
BH 11208
(Bridgehunter.com ID)
Inspection
(as of 01/2007)
Superstructure condition rating:
Fair
(5 out of 9)
Substructure condition rating:
Fair
(5 out of 9)
Sufficiency rating: 53.9
(out of 100)
Average daily traffic
(as of 1979)
1,959
Categories
19th Century
(2,016)
Arch
(7,665)
Built 1896
(80)
Built during 1890s
(789)
California
(1,066)
Deck arch
(6,749)
NR-eligible
(2,577)
Napa County, California
(32)
Napa, California
(9)
Open
(21,979)
Owned by county
(14,324)
Span length 25-50 feet
(6,208)
Stone arch
(1,376)
Structurally deficient
(12,027)
Total length 25-50 feet
(5,365)
Comments
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