US Bridges

IH35NB to US183NB over US 183 and IH35 Mainlane

Fair

Travis County, Texas · IH35/US183 Interchange · Structure no. 142270015106102

Built
1998
27 years old, rebuilt 2021
Condition
Fair
inspected August 2023
Type
Segmental Box Girder
Prestressed Concrete Continuous
Length
1,943 ft
11 main spans
Daily traffic
148,000
2011 count
Owner
State
State Highway Agency

About this bridge

IH35NB to US183NB over US 183 and IH35 Mainlane is a prestressed concrete continuous segmental box girder carrying IH35NB to US183NB over US 183 and IH35 Mainlane in Travis County, Texas. It was built in 1998 and reconstructed in 2021, so it is 27 years old, younger than the Texas average of 44.4 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 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 148,000 vehicles a day, roughly 2% of them trucks, projected to reach 170,000 by 2031. The structure is 1,943 ft (592.2 m) long and 28 ft wide.

Location

Open in Google Maps
CarriesIH35NB to US183NB
CrossesUS 183 and IH35 Mainlane
LocationIH35/US183 Interchange
RouteU.S. Route 183
CountyTravis County
StateTexas
Coordinates30.33863, -97.70027
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
Deck8 Very GoodNo problems noted.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60 US tons
Inventory rating36 US tons

Structure

Structure typeSegmental Box Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans11 (+13 approach)
Design loadHS 20
Structure length1,943 ft (592.2 m)
Longest span178 ft (54.3 m)
Deck width28 ft (8.5 m)
Roadway width26 ft (8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic148,000 (2011)
Projected traffic170,000 by 2031
Trucks2%
Lanes on structure1
Traffic directionOne-way traffic
CarriesFourth level (interchange)
CrossesHighway
Detour if closed—
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 IH35NB to US183NB over US 183 and IH35 Mainlane built?

It was built in 1998, making it 27 years old in 2025. It was reconstructed in 2021.

What condition is IH35NB to US183NB over US 183 and IH35 Mainlane 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 August 2023.

How much traffic does IH35NB to US183NB over US 183 and IH35 Mainlane carry?

About 148,000 vehicles per day (2011 count), of which roughly 2% are trucks.

How long is IH35NB to US183NB over US 183 and IH35 Mainlane?

The structure is 1,943 ft (592.2 m) long with a longest span of 178 ft (54.3 m) and a deck 28 ft wide.

Who owns IH35NB to US183NB over US 183 and IH35 Mainlane?

It is owned by the State Highway Agency.