US Bridges

US 183 Nbml over Carson Creek

Good

Travis County, Texas · 0.5 MI N of SH 71 · Structure no. 142270015109519

Built
2020
5 years old
Condition
Good
inspected September 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
148 ft
2 main spans
Daily traffic
41,425
2019 count
Owner
Toll Authority
Local Toll Authority

About this bridge

US 183 Nbml over Carson Creek is a prestressed concrete stringer/multi-beam or girder carrying US 183 Nbml over Carson Creek in Travis County, Texas. It was built in 2020, so it is 5 years old, younger than the Texas average of 44.4 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 41,425 vehicles a day, roughly 8% of them trucks, projected to reach 49,710 by 2039. The structure is 148 ft (45.1 m) long and 102 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesUS 183 Nbml
CrossesCarson Creek
Location0.5 MI N of SH 71
RouteU.S. Route 183
CountyTravis County
StateTexas
Coordinates30.23426, -97.68449
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.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60 US tons
Inventory rating36 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadHL 93
Structure length148 ft (45.1 m)
Longest span75 ft (22.9 m)
Deck width102 ft (31.1 m)
Roadway width99 ft (30.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic41,425 (2019)
Projected traffic49,710 by 2039
Trucks8%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a toll road
National Highway SystemYes

Ownership and planned work

OwnerLocal Toll Authority
Maintained byLocal Toll Authority
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 US 183 Nbml over Carson Creek built?

It was built in 2020, making it 5 years old in 2025.

What condition is US 183 Nbml over Carson Creek 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 September 2023.

How much traffic does US 183 Nbml over Carson Creek carry?

About 41,425 vehicles per day (2019 count), of which roughly 8% are trucks.

How long is US 183 Nbml over Carson Creek?

The structure is 148 ft (45.1 m) long with a longest span of 75 ft (22.9 m) and a deck 102 ft wide.

Who owns US 183 Nbml over Carson Creek?

It is owned by the Local Toll Authority.