US Bridges

State Route 99 over SB 99-NORTH ST Off Ramp

Good

Stanislaus County, California · 10-STA-099-R11.62-CER · Structure no. 38 0073

Built
1965
60 years old
Condition
Good
inspected March 2023
Type
Tee Beam
Concrete Continuous
Length
155 ft
3 main spans
Daily traffic
101,000
2011 count
Owner
State
State Highway Agency

About this bridge

State Route 99 over SB 99-NORTH ST Off Ramp is a concrete continuous tee beam carrying State Route 99 over SB 99-NORTH ST Off 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 155 ft (47.1 m) long and 118 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesState Route 99
CrossesSB 99-NORTH ST Off Ramp
Location10-STA-099-R11.62-CER
RouteState Highway 99
Coordinates37.59148, -120.95633
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 rating47.8 US tons
Inventory rating34 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length155 ft (47.1 m)
Longest span67 ft (20.4 m)
Deck width118 ft (36.1 m)
Roadway width114 ft (34.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic101,000 (2011)
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 SB 99-NORTH ST Off Ramp built?

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

What condition is State Route 99 over SB 99-NORTH ST Off 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 SB 99-NORTH ST Off Ramp carry?

About 101,000 vehicles per day (2011 count), of which roughly 13% are trucks.

How long is State Route 99 over SB 99-NORTH ST Off Ramp?

The structure is 155 ft (47.1 m) long with a longest span of 67 ft (20.4 m) and a deck 118 ft wide.

Who owns State Route 99 over SB 99-NORTH ST Off Ramp?

It is owned by the State Highway Agency.