US Bridges

White Rock Road over Deadman Creek

Fair

Mariposa County, California · 0.6 MI W Westfall RD · Structure no. 40C0063

Built
1992
33 years old
Condition
Fair
inspected September 2023
Type
Arch - Deck
Steel
Length
25 ft
1 main span
Daily traffic
20
1998 count
Owner
County
County Highway Agency

About this bridge

White Rock Road over Deadman Creek is a steel arch - deck carrying White Rock Road over Deadman Creek in Mariposa County, California. It was built in 1992, so it is 33 years old, younger 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 20 vehicles a day, roughly 1% of them trucks, projected to reach 54 by 2040. The structure is 25 ft (7.5 m) long and 23 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
CarriesWhite Rock Road
CrossesDeadman Creek
Location0.6 MI W Westfall RD
RouteCounty Highway 0
CountyMariposa County
StateCalifornia
Coordinates37.33153, -120.04762
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
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionSeptember 2023
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
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeArch - Deck
MaterialSteel
DeckNot applicable
Main spans1
Design loadUnknown
Structure length25 ft (7.5 m)
Longest span25 ft (7.5 m)
Deck width23 ft (7 m)
Roadway width21 ft (6.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20 (1998)
Projected traffic54 by 2040
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 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 White Rock Road over Deadman Creek built?

It was built in 1992, making it 33 years old in 2025.

What condition is White Rock Road over Deadman 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 2023.

How much traffic does White Rock Road over Deadman Creek carry?

About 20 vehicles per day (1998 count), of which roughly 1% are trucks.

How long is White Rock Road over Deadman Creek?

The structure is 25 ft (7.5 m) long with a longest span of 25 ft (7.5 m) and a deck 23 ft wide.

Who owns White Rock Road over Deadman Creek?

It is owned by the County Highway Agency.