US Bridges

Kahlon Road over Mariposa Creek

Fair

Merced County, California · 2.4 MI SE of E Mission RD · Structure no. 39C0378

Built
1938
87 years old, rebuilt 2015
Condition
Fair
inspected September 2024
Type
Slab
Concrete Continuous
Length
76 ft
5 main spans
Daily traffic
384
2018 count
Owner
County
County Highway Agency

About this bridge

Kahlon Road over Mariposa Creek is a concrete continuous slab carrying Kahlon Road over Mariposa Creek in Merced County, California. It was built in 1938 and reconstructed in 2015, 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 384 vehicles a day, projected to reach 1,121 by 2042. The structure is 76 ft (23.2 m) long and 48 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesKahlon Road
CrossesMariposa Creek
Location2.4 MI SE of E Mission RD
RouteCounty Highway 0
CountyMerced County
StateCalifornia
Coordinates37.24934, -120.40956
Functional classRural Local

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44.6 US tons
Inventory rating26.8 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadUnknown
Structure length76 ft (23.2 m)
Longest span21 ft (6.4 m)
Deck width48 ft (14.5 m)
Roadway width44 ft (13.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic384 (2018)
Projected traffic1,121 by 2042
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Kahlon Road over Mariposa Creek built?

It was built in 1938, making it 87 years old in 2025. It was reconstructed in 2015.

What condition is Kahlon Road over Mariposa 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 September 2024.

How much traffic does Kahlon Road over Mariposa Creek carry?

About 384 vehicles per day (2018 count).

How long is Kahlon Road over Mariposa Creek?

The structure is 76 ft (23.2 m) long with a longest span of 21 ft (6.4 m) and a deck 48 ft wide.

Who owns Kahlon Road over Mariposa Creek?

It is owned by the County Highway Agency.