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Nearby Bridges in NBI 2021: 1


STATE ROUTE 37 over PETALUMA RIVER (Route: 37)
Num: 27 0013x
Open: no restriction [A]
Built: 1958, Reconstructed: N/A [0000]
Historic: Bridge is not eligible for the NRHP. [5]

Google Streetview (If Available)

Rough Distance: 0.4 Miles (0.7 Kilometers)

Bridge Type
Main Span(s): Steel [3] Stringer/Multi-beam or girder [02]
Approach Span(s): Prestressed concrete [5] Tee beam [04]
Deck: Concrete Cast-in-Place [1] with Wearing Surface: Bituminous [6]
Bridge Dimensions
Length: 665.4 m = 2183.2 ft
Main Spans: 1 at 48.8 m = 160.1 ft
Approach Spans: 28
Skew: 0
Width, Roadway: 18.3 m = 60.0 ft (4 Lanes) and Out-To-Out: 20.5 m = 67.3 ft for a 17.1 m = 56.1 ft approaching roadway.
Vertical Clearance: 99.99 m = 328.1 ft and Navigational Clearance: 21.3 m = 69.9 ft
Location
Unknown [00000]: Marin County [041], California [06]
Owned by State Highway Agency [01], DOT District: 4
04-MRN-037-14.47
Condition
Deck: Fair [5]
Superstructure: Good [7]
Substructure: Fair [5]
Loading
Design: MS 18 / HS 20 [5]
Operating: 65.4 metric ton = 71.9 tons (Load Factor(LF) [1])
Inventory: 32.4 metric ton = 35.6 tons (Load Factor(LF) [1])
Appraisal
Structural: Somewhat better than minimum adequacy to tolerate being left in place as is [5]
Deck Geometry: Meets minimum tolerable limits to be left in place as is [4]
Road Alignment: Equal to present desirable criteria [8]
Waterway: Superior to present desirable criteria [9] and Bridge foundations determined to be stable for assessed or calculated scour condition. [5]
Inspections
Date: May 2020 [0520] and Frequency: 24
Future Work
Work Needed:
Bridge Detour: 4.8 km = 3.0 mi
Traffic
ADT: 34000 (2009) and Trucks: 4%
Future ADT: 53985 (In 2040 )

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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