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Nearby Bridges in NBI 2021: 1


ALEXANDER VALLEY R over RUSSIAN RIVER - JIMTOWN (Route: 0)
Num: 20C0006x
Open: no restriction [A]
Built: 1949, Reconstructed: N/A [0000]
Historic: Bridge is not eligible for the NRHP. [5]

Google Streetview (If Available)

Rough Distance: 0 Miles (0.1 Kilometers)

Bridge Type
Main Span(s): Steel continuous [4] Truss - Thru [10]
Approach Span(s): Concrete [1] Tee beam [04]
Deck: Concrete Cast-in-Place [1] with Wearing Surface:
Bridge Dimensions
Length: 421.8 m = 1383.9 ft
Main Spans: 5 at 36.6 m = 120.1 ft
Approach Spans: 30
Skew: 0
Width, Roadway: 7.3 m = 24.0 ft (2 Lanes) and Out-To-Out: 8.5 m = 27.9 ft for a 7.3 m = 24.0 ft approaching roadway.
Vertical Clearance: 99.99 m = 328.1 ft and Navigational Clearance: 0 = N/A
Location
Unknown [00000]: Sonoma County [097], California [06]
Owned by County Highway Agency [02], DOT District: 4
NORTH OF HEALDSBURG
Condition
Deck: Poor [4]
Superstructure: Fair [5]
Substructure: Good [7]
Loading
Design: MS 18 / HS 20 [5]
Operating: 33.7 metric ton = 37.1 tons (Load Factor(LF) [1])
Inventory: 15.6 metric ton = 17.2 tons (Load Factor(LF) [1])
Appraisal
Structural: Meets minimum tolerable limits to be left in place as is [4]
Deck Geometry: Basically intolerable requiring high priority of replacement [2]
Road Alignment: Better than present minimum criteria [7]
Waterway: Better than present minimum criteria [7] and Bridge is scour critical; bridge foundations determined to be unstable. [3]
Inspections
Date: July 1999 [799] and Frequency: 24
Future Work
Work Needed: Replacement of bridge or other structure because of substandard load carrying capacity or substantial bridge roadway geometry. [31]
Bridge Detour: 1.9 km = 1.2 mi
Traffic
ADT: 3300 (2012) and Trucks: 2%
Future ADT: 3800 (In 2037 )

Special Bridge Conditions Legend: R - Former location of relocated bridge. ! - At risk for demolition or destruction. X - Confirmed demolished or collapsed. S  - Dismantled and/or in storage. L -  Severe loss of historic integrity due to alteration.

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