US Bridges

Dan Mcnamara Road over Deadman Creek

Poor

Merced County, California · 0.8 MI N Sandy Mush Road · Structure no. 39C0169

Built
1960
65 years old
Condition
Poor
inspected November 2024
Type
Slab
Concrete Continuous
Length
47 ft
2 main spans
Daily traffic
400
1990 count
Owner
County
County Highway Agency

About this bridge

Dan Mcnamara Road over Deadman Creek is a concrete continuous slab carrying Dan Mcnamara Road over Deadman Creek in Merced 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 poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 400 vehicles a day, roughly 5% of them trucks, projected to reach 1,089 by 2042. The structure is 47 ft (14.3 m) long and 27 ft wide. If it were closed, the detour would be 18 mi (29 km).

CarriesDan Mcnamara Road
CrossesDeadman Creek
Location0.8 MI N Sandy Mush Road
RouteCounty Highway 0
Coordinates37.19932, -120.67079
Functional classRural Minor Collector

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry5: 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 rating35.4 US tons
Inventory rating27.1 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length47 ft (14.3 m)
Longest span22 ft (6.7 m)
Deck width27 ft (8.1 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic400 (1990)
Projected traffic1,089 by 2042
Trucks5%
Lanes on structure2
Traffic directionTwo-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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$186,000 (2017 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Dan Mcnamara Road over Deadman Creek built?

It was built in 1960, making it 65 years old in 2025.

What condition is Dan Mcnamara Road over Deadman Creek in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in November 2024.

How much traffic does Dan Mcnamara Road over Deadman Creek carry?

About 400 vehicles per day (1990 count), of which roughly 5% are trucks.

How long is Dan Mcnamara Road over Deadman Creek?

The structure is 47 ft (14.3 m) long with a longest span of 22 ft (6.7 m) and a deck 27 ft wide.

Who owns Dan Mcnamara Road over Deadman Creek?

It is owned by the County Highway Agency.