US Bridges

White Rock Road over Deadman Creek

Fair

Mariposa County, California · 0.05 MI E Westfall RD · Structure no. 40C0062

Built
1960
65 years old
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
30 ft
2 main spans
Daily traffic
20
2002 count
Owner
County
County Highway Agency

About this bridge

White Rock Road over Deadman Creek is a wood or timber stringer/multi-beam or girder carrying White Rock Road over Deadman Creek in Mariposa County, California. It was built in 1960, so it is 65 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 20 vehicles a day, projected to reach 54 by 2040. The structure is 30 ft (9.2 m) long and 13 ft wide. If it were closed, the detour would be 18 mi (29 km).

Location

Open in Google Maps
CarriesWhite Rock Road
CrossesDeadman Creek
Location0.05 MI E Westfall RD
RouteCounty Highway 0
CountyMariposa County
StateCalifornia
Coordinates37.33633, -120.03869
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating39.7 US tons
Inventory rating27.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length30 ft (9.2 m)
Longest span14 ft (4.4 m)
Deck width13 ft (4 m)
Roadway width12 ft (3.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20 (2002)
Projected traffic54 by 2040
Trucks—
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed18 mi (29 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 1960, making it 65 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 (2002 count).

How long is White Rock Road over Deadman Creek?

The structure is 30 ft (9.2 m) long with a longest span of 14 ft (4.4 m) and a deck 13 ft wide.

Who owns White Rock Road over Deadman Creek?

It is owned by the County Highway Agency.