US Bridges

State Route 99 SB over UP RR

Good

Madera County, California · 06-MAD-099-23.09 · Structure no. 41 0014L

Built
1957
68 years old, rebuilt 1993
Condition
Good
inspected June 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
207 ft
3 main spans
Daily traffic
18,750
2009 count
Owner
State
State Highway Agency

About this bridge

State Route 99 SB over UP RR is a prestressed concrete stringer/multi-beam or girder carrying State Route 99 SB over UP RR in Madera County, California. It was built in 1957 and reconstructed in 1993, so it is 68 years old, older than the California average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 18,750 vehicles a day, roughly 25% of them trucks, projected to reach 53,946 by 2043. The structure is 207 ft (63.1 m) long and 43 ft wide. If it were closed, the detour would be 11.8 mi (19 km).

CarriesState Route 99 SB
CrossesUP RR
Location06-MAD-099-23.09
RouteState Highway 99
Coordinates37.0887, -120.21331
Functional classRural Principal Arterial - Other

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating40 US tons
Inventory rating24.7 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length207 ft (63.1 m)
Longest span69 ft (20.9 m)
Deck width43 ft (13 m)
Roadway width39 ft (11.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic18,750 (2009)
Projected traffic53,946 by 2043
Trucks25%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesRailroad
Detour if closed11.8 mi (19 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was State Route 99 SB over UP RR built?

It was built in 1957, making it 68 years old in 2025. It was reconstructed in 1993.

What condition is State Route 99 SB over UP RR in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in June 2023.

How much traffic does State Route 99 SB over UP RR carry?

About 18,750 vehicles per day (2009 count), of which roughly 25% are trucks.

How long is State Route 99 SB over UP RR?

The structure is 207 ft (63.1 m) long with a longest span of 69 ft (20.9 m) and a deck 43 ft wide.

Who owns State Route 99 SB over UP RR?

It is owned by the State Highway Agency.