US Bridges

State Route 4 over Kendall Creek Overflow

Fair

Contra Costa County, California · 04-CC-004-45.84 · Structure no. 28 0033

Built
1990
35 years old
Condition
Fair
inspected June 2023
Type
Slab
Concrete Continuous
Length
47 ft
3 main spans
Daily traffic
18,900
2017 count
Owner
State
State Highway Agency

About this bridge

State Route 4 over Kendall Creek Overflow is a concrete continuous slab carrying State Route 4 over Kendall Creek Overflow in Contra Costa County, California. It was built in 1990, so it is 35 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 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 18,900 vehicles a day, roughly 15% of them trucks, projected to reach 28,829 by 2045. The structure is 47 ft (14.2 m) long and 58 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesState Route 4
CrossesKendall Creek Overflow
Location04-CC-004-45.84
RouteState Highway 4
CountyContra Costa County
StateCalifornia
Coordinates37.88929, -121.61388
Functional classUrban Other Principal 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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length47 ft (14.2 m)
Longest span15 ft (4.6 m)
Deck width58 ft (17.7 m)
Roadway width54 ft (16.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic18,900 (2017)
Projected traffic28,829 by 2045
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 km)
TollOn a free road
National Highway SystemYes

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—
NavigationNo navigation control on waterway

Frequently asked questions

When was State Route 4 over Kendall Creek Overflow built?

It was built in 1990, making it 35 years old in 2025.

What condition is State Route 4 over Kendall Creek Overflow 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 2023.

How much traffic does State Route 4 over Kendall Creek Overflow carry?

About 18,900 vehicles per day (2017 count), of which roughly 15% are trucks.

How long is State Route 4 over Kendall Creek Overflow?

The structure is 47 ft (14.2 m) long with a longest span of 15 ft (4.6 m) and a deck 58 ft wide.

Who owns State Route 4 over Kendall Creek Overflow?

It is owned by the State Highway Agency.