US Bridges

Onramp over SR 99

Good

Madera County, California · 06-MAD-099-R7.28 · Structure no. 41 0089K

Built
2016
9 years old
Condition
Good
inspected June 2021
Type
Slab
Prestressed Concrete Continuous
Length
226 ft
4 main spans
Daily traffic
1,650
2010 count
Owner
State
State Highway Agency

About this bridge

Onramp over SR 99 is a prestressed concrete continuous slab carrying Onramp over SR 99 in Madera County, California. It was built in 2016, so it is 9 years old, younger 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 1,650 vehicles a day, roughly 10% of them trucks, projected to reach 3,563 by 2043. The structure is 226 ft (68.9 m) long and 27 ft wide. If it were closed, the detour would be 5 mi (8 km).

CarriesOnramp
CrossesSR 99
Location06-MAD-099-R7.28
RouteState Highway 99
Coordinates36.92213, -120.02046
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.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJune 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46.4 US tons
Inventory rating35.7 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHL 93
Structure length226 ft (68.9 m)
Longest span65 ft (19.7 m)
Deck width27 ft (8.2 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,650 (2010)
Projected traffic3,563 by 2043
Trucks10%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Onramp over SR 99 built?

It was built in 2016, making it 9 years old in 2025.

What condition is Onramp over SR 99 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 2021.

How much traffic does Onramp over SR 99 carry?

About 1,650 vehicles per day (2010 count), of which roughly 10% are trucks.

How long is Onramp over SR 99?

The structure is 226 ft (68.9 m) long with a longest span of 65 ft (19.7 m) and a deck 27 ft wide.

Who owns Onramp over SR 99?

It is owned by the State Highway Agency.