US Bridges

N Gateway DR over SR 99

Fair

Madera County, California · 06-MAD-099-12.75-MAD · Structure no. 41 0058

Built
1958
67 years old
Condition
Fair
inspected June 2023
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
302 ft
3 main spans
Daily traffic
4,000
1998 count
Owner
State
State Highway Agency

About this bridge

N Gateway DR over SR 99 is a concrete continuous box beam or girders - multiple carrying N Gateway DR over SR 99 in Madera County, California. It was built in 1958, so it is 67 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 4,000 vehicles a day, roughly 10% of them trucks, projected to reach 6,542 by 2041. The structure is 302 ft (92 m) long and 35 ft wide. If it were closed, the detour would be 14.3 mi (23 km).

Location

Open in Google Maps
CarriesN Gateway DR
CrossesSR 99
Location06-MAD-099-12.75-MAD
RouteCounty Highway 0
CountyMadera County
StateCalifornia
Coordinates36.9814, -120.08433
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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment7: Better than present minimum criteria
Operating rating41.8 US tons
Inventory rating25 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3 (+2 approach)
Design loadHS 20
Structure length302 ft (92 m)
Longest span97 ft (29.6 m)
Deck width35 ft (10.6 m)
Roadway width32 ft (9.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,000 (1998)
Projected traffic6,542 by 2041
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed14.3 mi (23 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was N Gateway DR over SR 99 built?

It was built in 1958, making it 67 years old in 2025.

What condition is N Gateway DR over SR 99 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 June 2023.

How much traffic does N Gateway DR over SR 99 carry?

About 4,000 vehicles per day (1998 count), of which roughly 10% are trucks.

How long is N Gateway DR over SR 99?

The structure is 302 ft (92 m) long with a longest span of 97 ft (29.6 m) and a deck 35 ft wide.

Who owns N Gateway DR over SR 99?

It is owned by the State Highway Agency.