4TH ST EAST over NATHANSON CREEK (Route: 0)
Num: 20C0495x
Open: no restriction [A]
Built: 1914, Reconstructed: N/A [0000]
Historic: Bridge is not eligible for the NRHP. [5]

Google Streetview (If Available)

Rough Distance: 0 Miles (0 Kilometers)

Bridge Type
Main Span(s): Concrete [1] 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: 10.7 m = 35.1 ft
Main Spans: 1 at 9.1 m = 29.9 ft
Approach Spans: 0
Skew: 18
Width, Roadway: 6.6 m = 21.7 ft (2 Lanes) and Out-To-Out: 10.1 m = 33.1 ft for a 9.4 m = 30.8 ft approaching roadway.
Vertical Clearance: 99.99 m = 328.1 ft and Navigational Clearance: 0 = N/A

Location
Sonoma [72646]: Sonoma County [097], California [06]
Owned by City or Municipal Highway Agency [04], DOT District: 4
0.1 MI N OF E NAPA ST

Condition
Deck: Not Applicable [N]
Superstructure: Fair [5]
Substructure: Good [7]
Loading
Design:
Operating: 25.6 metric ton = 28.2 tons ()
Inventory: 15.2 metric ton = 16.7 tons ()

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: Equal to present desirable criteria [8] and Bridge foundations determined to be stable for the assessed or calculated scour condition. [8]
Inspections
Date: June 1999 [699] and Frequency: 24

Future Work
Work Needed:
Bridge Detour: 0.2 km = 0.1 mi
Traffic
ADT: 2100 (2015) and Trucks: 1%
Future ADT: 2654 (In 2036 )

2ND STREET over NATHANSON CREEK (Route: 0)
Num: 20C0520x
Open: no restriction [A]
Built: 1909, Reconstructed: N/A [0000]
Historic: Bridge is on the NRHP. [1]

Google Streetview (If Available)

Rough Distance: 0.3 Miles (0.5 Kilometers)

Bridge Type
Main Span(s): Concrete [1] 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: 8.4 m = 27.6 ft
Main Spans: 1 at 6.4 m = 21.0 ft
Approach Spans: 0
Skew: 61
Width, Roadway: 5 m = 16.4 ft (2 Lanes) and Out-To-Out: 8.8 m = 28.9 ft for a 7 m = 23.0 ft approaching roadway.
Vertical Clearance: 99.99 m = 328.1 ft and Navigational Clearance: 0 = N/A

Location
Sonoma [72646]: Sonoma County [097], California [06]
Owned by City or Municipal Highway Agency [04], DOT District: 4
.02 mi so. of E. Napa St

Condition
Deck: Not Applicable [N]
Superstructure: Good [7]
Substructure: Good [7]
Loading
Design:
Operating: 26.2 metric ton = 28.8 tons ()
Inventory: 15.9 metric ton = 17.5 tons ()

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: Equal to present desirable criteria [8]
Waterway: Equal to present minimum criteria [6] and Bridge foundations determined to be stable for assessed or calculated scour condition. [5]
Inspections
Date: June 1999 [699] and Frequency: 24

Future Work
Work Needed:
Bridge Detour: 0.2 km = 0.1 mi
Traffic
ADT: 820 (2015) and Trucks: 1%
Future ADT: 1345 (In 2037 )