US Bridges

State Route 49 over Maxwell Creek

Fair

Mariposa County, California · 10-MPA-049-44.62 · Structure no. 40 0019

Built
1963
62 years old
Condition
Fair
inspected July 2024
Type
Tee Beam
Concrete Continuous
Length
116 ft
3 main spans
Daily traffic
615
2009 count
Owner
State
State Highway Agency

About this bridge

State Route 49 over Maxwell Creek is a concrete continuous tee beam carrying State Route 49 over Maxwell Creek in Mariposa County, California. It was built in 1963, so it is 62 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 615 vehicles a day, roughly 5% of them trucks, projected to reach 735 by 2042. The structure is 116 ft (35.4 m) long and 34 ft wide. If it were closed, the detour would be 47.8 mi (77 km).

CarriesState Route 49
CrossesMaxwell Creek
Location10-MPA-049-44.62
RouteState Highway 49
Coordinates37.70981, -120.19649
Functional classRural Minor Arterial

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
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 adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating32.2 US tons
Inventory rating22.5 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length116 ft (35.4 m)
Longest span44 ft (13.4 m)
Deck width34 ft (10.4 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic615 (2009)
Projected traffic735 by 2042
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed47.8 mi (77 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 State Route 49 over Maxwell Creek built?

It was built in 1963, making it 62 years old in 2025.

What condition is State Route 49 over Maxwell 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 July 2024.

How much traffic does State Route 49 over Maxwell Creek carry?

About 615 vehicles per day (2009 count), of which roughly 5% are trucks.

How long is State Route 49 over Maxwell Creek?

The structure is 116 ft (35.4 m) long with a longest span of 44 ft (13.4 m) and a deck 34 ft wide.

Who owns State Route 49 over Maxwell Creek?

It is owned by the State Highway Agency.