US Bridges

LA Grange Road over Salt Spring Creek

Good

Tuolumne County, California · 4.1 MI N/E Stnls CO Line · Structure no. 32C0035

Built
2004
21 years old
Condition
Good
inspected July 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
70 ft
1 main span
Daily traffic
2,868
2014 count
Owner
County
County Highway Agency

About this bridge

LA Grange Road over Salt Spring Creek is a prestressed concrete stringer/multi-beam or girder carrying LA Grange Road over Salt Spring Creek in Tuolumne County, California. It was built in 2004, so it is 21 years old, younger than the California average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 2,868 vehicles a day, roughly 5% of them trucks, projected to reach 3,218 by 2041. The structure is 70 ft (21.3 m) long and 42 ft wide. If it were closed, the detour would be 41 mi (66 km).

CarriesLA Grange Road
CrossesSalt Spring Creek
Location4.1 MI N/E Stnls CO Line
RouteCounty Highway 0
Coordinates37.74076, -120.45186
Functional classRural Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJuly 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length70 ft (21.3 m)
Longest span69 ft (21 m)
Deck width42 ft (12.8 m)
Roadway width40 ft (12.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,868 (2014)
Projected traffic3,218 by 2041
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed41 mi (66 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 LA Grange Road over Salt Spring Creek built?

It was built in 2004, making it 21 years old in 2025.

What condition is LA Grange Road over Salt Spring Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in July 2023.

How much traffic does LA Grange Road over Salt Spring Creek carry?

About 2,868 vehicles per day (2014 count), of which roughly 5% are trucks.

How long is LA Grange Road over Salt Spring Creek?

The structure is 70 ft (21.3 m) long with a longest span of 69 ft (21 m) and a deck 42 ft wide.

Who owns LA Grange Road over Salt Spring Creek?

It is owned by the County Highway Agency.