US Bridges

State Route 4 over Pacific Creek

Fair

Alpine County, California · 10-ALP-004-11.99 · Structure no. 31 0018

Built
1937
88 years old, rebuilt 1986
Condition
Fair
inspected October 2023
Type
Slab
Prestressed Concrete
Length
25 ft
1 main span
Daily traffic
1,250
2009 count
Owner
State
State Highway Agency

About this bridge

State Route 4 over Pacific Creek is a prestressed concrete slab carrying State Route 4 over Pacific Creek in Alpine County, California. It was built in 1937 and reconstructed in 1986, so it is 88 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 1,250 vehicles a day, projected to reach 1,467 by 2041. The structure is 25 ft (7.6 m) long and 32 ft wide. If it were closed, the detour would be 36.7 mi (59 km).

Location

Open in Google Maps
CarriesState Route 4
CrossesPacific Creek
Location10-ALP-004-11.99
RouteState Highway 4
CountyAlpine County
StateCalifornia
Coordinates38.52766, -119.89915
Functional classRural 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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
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
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length25 ft (7.6 m)
Longest span22 ft (6.7 m)
Deck width32 ft (9.9 m)
Roadway width31 ft (9.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,250 (2009)
Projected traffic1,467 by 2041
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed36.7 mi (59 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was State Route 4 over Pacific Creek built?

It was built in 1937, making it 88 years old in 2025. It was reconstructed in 1986.

What condition is State Route 4 over Pacific Creek 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 October 2023.

How much traffic does State Route 4 over Pacific Creek carry?

About 1,250 vehicles per day (2009 count).

How long is State Route 4 over Pacific Creek?

The structure is 25 ft (7.6 m) long with a longest span of 22 ft (6.7 m) and a deck 32 ft wide.

Who owns State Route 4 over Pacific Creek?

It is owned by the State Highway Agency.