Bridge Type
Main Span(s): Steel [3] Arch - Deck [11]
Approach Span(s): Other [00]
Deck: Not applicable [N] with Wearing Surface: Not applicable (applies only to structures with no deck) [N]
Bridge Dimensions
Length: 9.4 m = 30.8 ft
Main Spans: 1 at 9.1 m = 29.9 ft
Approach Spans: 0
Skew: 0
Width, Roadway: 7.4 m = 24.3 ft (2 Lanes) and Out-To-Out: 8 m = 26.2 ft for a 8 m = 26.2 ft approaching roadway.
Vertical Clearance: 99.99 m = 328.1 ft and Navigational Clearance: 0 = N/A
Location
Unknown [00000]: Napa County [055], California [06]
Owned by County Highway Agency [02], DOT District: 4
0.1 MI W/O SR 128
Condition
Deck: Not Applicable [N]
Superstructure: Good [7]
Substructure: Good [7]
Loading
Design:
Operating: 40.5 metric ton = 44.6 tons ()
Inventory: 24.3 metric ton = 26.7 tons ()
Appraisal
Structural: Equal to present minimum criteria [6]
Deck Geometry: Equal to present minimum criteria [6]
Road Alignment: Somewhat better than minimum adequacy to tolerate being left in place as is [5]
Waterway: Equal to present desirable criteria [8] 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: 0.2 km = 0.1 mi
Traffic
ADT: 100 (2012) and Trucks: 10%
Future ADT: 320 (In 2040
)
