US Bridges

Nat Trails HWY over Workman Wash

Fair

San Bernardino County, California · 0.5 MI N/O RTE 40 · Structure no. 54C0132

Built
1890
135 years old
Condition
Fair
inspected February 2024
Type
Arch - Deck
Masonry
Length
26 ft
1 main span
Daily traffic
146
2022 count
Owner
County
County Highway Agency

About this bridge

Nat Trails HWY over Workman Wash is a masonry arch - deck carrying Nat Trails HWY over Workman Wash in San Bernardino County, California. It was built in 1890, so it is 135 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 146 vehicles a day, roughly 3% of them trucks, projected to reach 158 by 2046. The structure is 26 ft (7.9 m) long. If it were closed, the detour would be 123.7 mi (199 km).

Location

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CarriesNat Trails HWY
CrossesWorkman Wash
Location0.5 MI N/O RTE 40
RouteCounty Highway 0
CountySan Bernardino County
StateCalifornia
Coordinates34.72462, -114.49343
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
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating30 US tons
Inventory rating17.9 US tons

Structure

Structure typeArch - Deck
MaterialMasonry
DeckNot applicable
Main spans1
Design loadUnknown
Structure length26 ft (7.9 m)
Longest span24 ft (7.3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic146 (2022)
Projected traffic158 by 2046
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Nat Trails HWY over Workman Wash built?

It was built in 1890, making it 135 years old in 2025.

What condition is Nat Trails HWY over Workman Wash 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 February 2024.

How much traffic does Nat Trails HWY over Workman Wash carry?

About 146 vehicles per day (2022 count), of which roughly 3% are trucks.

How long is Nat Trails HWY over Workman Wash?

The structure is 26 ft (7.9 m) long with a longest span of 24 ft (7.3 m).

Who owns Nat Trails HWY over Workman Wash?

It is owned by the County Highway Agency.