US Bridges

State Route 4 over BNSF RY

Fair

Contra Costa County, California · 04-CC-004-R9.10-MTZ · Structure no. 28 0252

Built
1938
87 years old
Condition
Fair
inspected June 2024
Type
Arch - Deck
Concrete
Length
605 ft
1 main span
Daily traffic
62,000
2018 count
Owner
Railroad
Railroad

About this bridge

State Route 4 over BNSF RY is a concrete arch - deck carrying State Route 4 over BNSF RY in Contra Costa County, California. It was built in 1938, so it is 87 years old, older than the California average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 62,000 vehicles a day, roughly 7% of them trucks, projected to reach 127,639 by 2042. The structure is 605 ft (184.4 m) long. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesState Route 4
CrossesBNSF RY
Location04-CC-004-R9.10-MTZ
RouteState Highway 4
CountyContra Costa County
StateCalifornia
Coordinates37.99451, -122.12075
Functional classUrban Principal Arterial - Other Freeway or Expressway

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating44.6 US tons
Inventory rating26.8 US tons

Structure

Structure typeArch - Deck
MaterialConcrete
DeckNot applicable
Main spans1
Design loadUnknown
Structure length605 ft (184.4 m)
Longest span22 ft (6.6 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic62,000 (2018)
Projected traffic127,639 by 2042
Trucks7%
Lanes on structure7
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway and railroad
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerRailroad
Maintained byRailroad
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was State Route 4 over BNSF RY built?

It was built in 1938, making it 87 years old in 2025.

What condition is State Route 4 over BNSF RY in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in June 2024.

How much traffic does State Route 4 over BNSF RY carry?

About 62,000 vehicles per day (2018 count), of which roughly 7% are trucks.

How long is State Route 4 over BNSF RY?

The structure is 605 ft (184.4 m) long with a longest span of 22 ft (6.6 m).

Who owns State Route 4 over BNSF RY?

It is owned by the Railroad.