US Bridges

N99-W4 Connector over SR 99 E4-N99 N99-E26

Fair

San Joaquin County, California · 10-SJ-099-18.57 · Structure no. 29 0309G

Built
1993
32 years old
Condition
Fair
inspected June 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
683 ft
6 main spans
Daily traffic
16,000
2009 count
Owner
State
State Highway Agency

About this bridge

N99-W4 Connector over SR 99 E4-N99 N99-E26 is a prestressed concrete continuous box beam or girders - multiple carrying N99-W4 Connector over SR 99 E4-N99 N99-E26 in San Joaquin County, California. It was built in 1993, so it is 32 years old, younger 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 16,000 vehicles a day, roughly 10% of them trucks, projected to reach 17,739 by 2046. The structure is 683 ft (208.2 m) long and 43 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesN99-W4 Connector
CrossesSR 99 E4-N99 N99-E26
Location10-SJ-099-18.57
RouteState Highway 99
CountySan Joaquin County
StateCalifornia
Coordinates37.96047, -121.24078
Functional classUrban Principal Arterial - Other Freeway or Expressway

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 2024
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 alignment7: Better than present minimum criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans6
Design loadHS 20 + Mod
Structure length683 ft (208.2 m)
Longest span138 ft (42 m)
Deck width43 ft (13 m)
Roadway width39 ft (11.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic16,000 (2009)
Projected traffic17,739 by 2046
Trucks10%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkNon-Interstate 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 N99-W4 Connector over SR 99 E4-N99 N99-E26 built?

It was built in 1993, making it 32 years old in 2025.

What condition is N99-W4 Connector over SR 99 E4-N99 N99-E26 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 2024.

How much traffic does N99-W4 Connector over SR 99 E4-N99 N99-E26 carry?

About 16,000 vehicles per day (2009 count), of which roughly 10% are trucks.

How long is N99-W4 Connector over SR 99 E4-N99 N99-E26?

The structure is 683 ft (208.2 m) long with a longest span of 138 ft (42 m) and a deck 43 ft wide.

Who owns N99-W4 Connector over SR 99 E4-N99 N99-E26?

It is owned by the State Highway Agency.