US Bridges

Harding Avenue over Lateral #6

FairPosted for load

Merced County, California · 0.4 MI E of Merced Ave · Structure no. 39C0108

Built
1924
101 years old
Condition
Fair
inspected January 2024
Type
Slab
Concrete
Length
23 ft
1 main span
Daily traffic
173
2008 count
Owner
County
County Highway Agency

About this bridge

Harding Avenue over Lateral #6 is a concrete slab carrying Harding Avenue over Lateral #6 in Merced County, California. It was built in 1924, so it is 101 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. Its operating status is: posted for load restriction.

It carries about 173 vehicles a day, roughly 26% of them trucks, projected to reach 328 by 2042. The structure is 23 ft (7 m) long and 24 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesHarding Avenue
CrossesLateral #6
Location0.4 MI E of Merced Ave
RouteCounty Highway 0
CountyMerced County
StateCalifornia
Coordinates37.46327, -120.78694
Functional classRural Minor Collector

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 protection8 Very GoodNo problems noted.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating22.8 US tons
Inventory rating13.6 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length23 ft (7 m)
Longest span22 ft (6.7 m)
Deck width24 ft (7.3 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic173 (2008)
Projected traffic328 by 2042
Trucks26%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 Harding Avenue over Lateral #6 built?

It was built in 1924, making it 101 years old in 2025.

What condition is Harding Avenue over Lateral #6 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 January 2024.

How much traffic does Harding Avenue over Lateral #6 carry?

About 173 vehicles per day (2008 count), of which roughly 26% are trucks.

How long is Harding Avenue over Lateral #6?

The structure is 23 ft (7 m) long with a longest span of 22 ft (6.7 m) and a deck 24 ft wide.

Who owns Harding Avenue over Lateral #6?

It is owned by the County Highway Agency.