US Bridges

Milano Way over State Route 4

Fair

Contra Costa County, California · 04-CC-004-R11.13-MTZ · Structure no. 28 0217

Built
1975
50 years old
Condition
Fair
inspected June 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
311 ft
2 main spans
Daily traffic
5,500
2018 count
Owner
State
State Highway Agency

About this bridge

Milano Way over State Route 4 is a prestressed concrete continuous box beam or girders - multiple carrying Milano Way over State Route 4 in Contra Costa County, California. It was built in 1975, so it is 50 years old, younger 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 6 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 5,500 vehicles a day, roughly 1% of them trucks, projected to reach 8,755 by 2042. The structure is 311 ft (94.8 m) long and 52 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesMilano Way
CrossesState Route 4
Location04-CC-004-R11.13-MTZ
RouteCity Street 0
CountyContra Costa County
StateCalifornia
Coordinates37.99152, -122.08663
Functional classUrban Minor Arterial

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating61.4 US tons
Inventory rating40.7 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length311 ft (94.8 m)
Longest span159 ft (48.5 m)
Deck width52 ft (15.8 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,500 (2018)
Projected traffic8,755 by 2042
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed123.7 mi (199 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 proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Milano Way over State Route 4 built?

It was built in 1975, making it 50 years old in 2025.

What condition is Milano Way over State Route 4 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 Milano Way over State Route 4 carry?

About 5,500 vehicles per day (2018 count), of which roughly 1% are trucks.

How long is Milano Way over State Route 4?

The structure is 311 ft (94.8 m) long with a longest span of 159 ft (48.5 m) and a deck 52 ft wide.

Who owns Milano Way over State Route 4?

It is owned by the State Highway Agency.