WATMAUGH ROAD over SONOMA CREEK (Route: 0)
Num: 20C0017x
Posted for load [P]
Built: 1929, Reconstructed: N/A [0000]
Historic: Bridge is eligible for the NRHP. [2]

Google Streetview (If Available)

Rough Distance: 0 Miles (0.1 Kilometers)

Bridge Type
Main Span(s): Steel [3] Truss - Thru [10]
Approach Span(s): Concrete [1] Tee beam [04]
Deck: Concrete Cast-in-Place [1] with Wearing Surface: Bituminous [6]

Bridge Dimensions
Length: 51.8 m = 170.0 ft
Main Spans: 1 at 31.4 m = 103.0 ft
Approach Spans: 2
Skew: 14
Width, Roadway: 6.8 m = 22.3 ft (2 Lanes) and Out-To-Out: 7.2 m = 23.6 ft for a 5.8 m = 19.0 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
0.3 MI WEST OF SR 12

Condition
Deck: Good [7]
Superstructure: Fair [5]
Substructure: Fair [5]
Loading
Design: M 13.5 / H 15 [2]
Operating: 22 metric ton = 24.2 tons (Load Factor(LF) [1])
Inventory: 13.3 metric ton = 14.6 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: Basically intolerable requiring high priority of corrrective action [3]
Waterway: Equal to present minimum criteria [6] and Bridge is scour critical; bridge foundations determined to be unstable. [3]
Inspections
Date: April 2020 [0420] and Frequency: 24

Future Work
Work Needed:
Bridge Detour: 0.8 km = 0.5 mi
Traffic
ADT: 3628 (2016) and Trucks: 1%
Future ADT: 2095 (In 2040 )

WATMAUGH ROAD over FOWLER CREEK (Route: 0)
Num: 20C0257x
Open: would be posted or closed except for temporary shoring [D]
Built: 1920, Reconstructed: 1965
Historic: Bridge is not eligible for the NRHP. [5]

Google Streetview (If Available)

Rough Distance: 0.5 Miles (0.8 Kilometers)

Bridge Type
Main Span(s): Concrete continuous [2] Slab [01]
Approach Span(s): Other [00]
Deck: Concrete Cast-in-Place [1] with Wearing Surface: Bituminous [6]

Bridge Dimensions
Length: 16.2 m = 53.2 ft
Main Spans: 3 at 5.3 m = 17.4 ft
Approach Spans: 0
Skew: 24
Width, Roadway: 12.6 m = 41.3 ft (2 Lanes) and Out-To-Out: 12.8 m = 42.0 ft for a 6.7 m = 22.0 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
0.3 MI E ARNOLD

Condition
Deck: Fair [5]
Superstructure: Fair [5]
Substructure: Critical [2]
Loading
Design:
Operating: 28.8 metric ton = 31.7 tons (Load and Resistance Factor Rating (LRFR) rating reported by rating factor (RF) method using HL-93 loadings [8])
Inventory: 22.4 metric ton = 24.6 tons (Load and Resistance Factor Rating (LRFR) rating reported by rating factor (RF) method using HL-93 loadings [8])

Appraisal
Structural: Basically intolerable requiring high priority of replacement [2]
Deck Geometry: Equal to present minimum criteria [6]
Road Alignment: Equal to present desirable criteria [8]
Waterway: Equal to present desirable criteria [8] and Bridge is scour critical; field review indicates that extensive scour has occurred at bridge foundations. [2]
Inspections
Date: April 2020 [0420] and Frequency: 12

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 km = 0.6 mi
Traffic
ADT: 3300 (2015) and Trucks: 3%
Future ADT: 2095 (In 2040 )