US Bridges

183A NB Ml over Spanish Oak CR Trib

Fair

Williamson County, Texas · 3.8 MI N of SH 45 · Structure no. 142460T00183012

Built
2007
18 years old
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
630 ft
6 main spans
Daily traffic
26,850
2010 count
Owner
Toll Authority
Local Toll Authority

About this bridge

183A NB Ml over Spanish Oak CR Trib is a prestressed concrete stringer/multi-beam or girder carrying 183A NB Ml over Spanish Oak CR Trib in Williamson County, Texas. It was built in 2007, so it is 18 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 26,850 vehicles a day, roughly 5% of them trucks, projected to reach 48,330 by 2030. The structure is 630 ft (192 m) long and 70 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Carries183A NB Ml
CrossesSpanish Oak CR Trib
Location3.8 MI N of SH 45
StateTexas
Coordinates30.51851, -97.81462
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum 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

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans6
Design loadHS 20
Structure length630 ft (192 m)
Longest span105 ft (32 m)
Deck width70 ft (21.3 m)
Roadway width68 ft (20.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic26,850 (2010)
Projected traffic48,330 by 2030
Trucks5%
Lanes on structure4
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was 183A NB Ml over Spanish Oak CR Trib built?

It was built in 2007, making it 18 years old in 2025.

What condition is 183A NB Ml over Spanish Oak CR Trib 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 September 2023.

How much traffic does 183A NB Ml over Spanish Oak CR Trib carry?

About 26,850 vehicles per day (2010 count), of which roughly 5% are trucks.

How long is 183A NB Ml over Spanish Oak CR Trib?

The structure is 630 ft (192 m) long with a longest span of 105 ft (32 m) and a deck 70 ft wide.

Who owns 183A NB Ml over Spanish Oak CR Trib?

It is owned by the Local Toll Authority.