US Bridges

State Route 99 over Second St-Sb 99 on Ramp

Good

Stanislaus County, California · 10-STA-099-R11.55-CER · Structure no. 38 0072

Built
1965
60 years old
Condition
Good
inspected March 2023
Type
Tee Beam
Concrete Continuous
Length
137 ft
3 main spans
Daily traffic
101,000
2009 count
Owner
State
State Highway Agency

About this bridge

State Route 99 over Second St-Sb 99 on Ramp is a concrete continuous tee beam carrying State Route 99 over Second St-Sb 99 on Ramp in Stanislaus County, California. It was built in 1965, so it is 60 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 101,000 vehicles a day, roughly 13% of them trucks, projected to reach 162,445 by 2045. The structure is 137 ft (41.7 m) long and 119 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesState Route 99
CrossesSecond St-Sb 99 on Ramp
Location10-STA-099-R11.55-CER
RouteState Highway 99
Coordinates37.59089, -120.95568
Functional classUrban Principal Arterial - Other Freeway or Expressway

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 inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating43.5 US tons
Inventory rating33.6 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length137 ft (41.7 m)
Longest span64 ft (19.5 m)
Deck width119 ft (36.2 m)
Roadway width114 ft (34.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic101,000 (2009)
Projected traffic162,445 by 2045
Trucks13%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 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 over Second St-Sb 99 on Ramp built?

It was built in 1965, making it 60 years old in 2025.

What condition is State Route 99 over Second St-Sb 99 on Ramp 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 March 2023.

How much traffic does State Route 99 over Second St-Sb 99 on Ramp carry?

About 101,000 vehicles per day (2009 count), of which roughly 13% are trucks.

How long is State Route 99 over Second St-Sb 99 on Ramp?

The structure is 137 ft (41.7 m) long with a longest span of 64 ft (19.5 m) and a deck 119 ft wide.

Who owns State Route 99 over Second St-Sb 99 on Ramp?

It is owned by the State Highway Agency.