US Bridges

Reilly Road over Miles Creek

Fair

Merced County, California · 0.7 MI E of SR 59 · Structure no. 39C0171

Built
1955
70 years old
Condition
Fair
inspected January 2024
Type
Culvert
Concrete Continuous
Length
30 ft
2 main spans
Daily traffic
150
2005 count
Owner
County
County Highway Agency

About this bridge

Reilly Road over Miles Creek is a concrete continuous culvert carrying Reilly Road over Miles Creek in Merced County, California. It was built in 1955, so it is 70 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 6 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 150 vehicles a day, roughly 3% of them trucks, projected to reach 210 by 2046. The structure is 30 ft (9.1 m) long and 32 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesReilly Road
CrossesMiles Creek
Location0.7 MI E of SR 59
RouteCounty Highway 0
CountyMerced County
StateCalifornia
Coordinates37.25817, -120.47537
Functional classRural Major 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
Channel and channel protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44.6 US tons
Inventory rating26.8 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length30 ft (9.1 m)
Longest span14 ft (4.4 m)
Deck width32 ft (9.8 m)
Roadway width31 ft (9.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic150 (2005)
Projected traffic210 by 2046
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 Reilly Road over Miles Creek built?

It was built in 1955, making it 70 years old in 2025.

What condition is Reilly Road over Miles 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 January 2024.

How much traffic does Reilly Road over Miles Creek carry?

About 150 vehicles per day (2005 count), of which roughly 3% are trucks.

How long is Reilly Road over Miles Creek?

The structure is 30 ft (9.1 m) long with a longest span of 14 ft (4.4 m) and a deck 32 ft wide.

Who owns Reilly Road over Miles Creek?

It is owned by the County Highway Agency.