US Bridges

State Route 128 over Putah Creek

Poor

Solano County, California · 04-SOL-128-0.72 · Structure no. 23 0099

Built
1954
71 years old
Condition
Poor
inspected April 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
449 ft
8 main spans
Daily traffic
2,600
2018 count
Owner
State
State Highway Agency

About this bridge

State Route 128 over Putah Creek is a prestressed concrete stringer/multi-beam or girder carrying State Route 128 over Putah Creek in Solano County, California. It was built in 1954, so it is 71 years old, older than the California average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 2,600 vehicles a day, projected to reach 3,173 by 2042. The structure is 449 ft (136.9 m) long and 31 ft wide. If it were closed, the detour would be 31.7 mi (51 km).

Location

Open in Google Maps
CarriesState Route 128
CrossesPutah Creek
Location04-SOL-128-0.72
RouteState Highway 128
CountySolano County
StateCalifornia
Coordinates38.51265, -122.0957
Functional classRural Minor Arterial

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating38.6 US tons
Inventory rating27.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans8
Design loadHS 20
Structure length449 ft (136.9 m)
Longest span56 ft (17.1 m)
Deck width31 ft (9.5 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,600 (2018)
Projected traffic3,173 by 2042
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed31.7 mi (51 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$2.2 million (2021 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was State Route 128 over Putah Creek built?

It was built in 1954, making it 71 years old in 2025.

What condition is State Route 128 over Putah Creek in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in April 2024.

How much traffic does State Route 128 over Putah Creek carry?

About 2,600 vehicles per day (2018 count).

How long is State Route 128 over Putah Creek?

The structure is 449 ft (136.9 m) long with a longest span of 56 ft (17.1 m) and a deck 31 ft wide.

Who owns State Route 128 over Putah Creek?

It is owned by the State Highway Agency.