US Bridges

183A NB over Block House CR

Good

Williamson County, Texas · 1.8 MI N of FM 1431 · Structure no. 142460T00183030

Built
2012
13 years old
Condition
Good
inspected September 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
905 ft
8 main spans
Daily traffic
35,207
2011 count
Owner
Toll Authority
Local Toll Authority

About this bridge

183A NB over Block House CR is a prestressed concrete stringer/multi-beam or girder carrying 183A NB over Block House CR in Williamson County, Texas. It was built in 2012, so it is 13 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 35,207 vehicles a day, roughly 5% of them trucks, projected to reach 60,106 by 2031. The structure is 905 ft (275.8 m) long and 58 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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Carries183A NB
CrossesBlock House CR
Location1.8 MI N of FM 1431
CountyWilliamson County
StateTexas
Coordinates30.55554, -97.82002
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 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

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans8
Design loadHL 93
Structure length905 ft (275.8 m)
Longest span125 ft (38.1 m)
Deck width58 ft (17.7 m)
Roadway width56 ft (17.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic35,207 (2011)
Projected traffic60,106 by 2031
Trucks5%
Lanes on structure3
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 183A NB over Block House CR built?

It was built in 2012, making it 13 years old in 2025.

What condition is 183A NB over Block House CR 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 183A NB over Block House CR carry?

About 35,207 vehicles per day (2011 count), of which roughly 5% are trucks.

How long is 183A NB over Block House CR?

The structure is 905 ft (275.8 m) long with a longest span of 125 ft (38.1 m) and a deck 58 ft wide.

Who owns 183A NB over Block House CR?

It is owned by the Local Toll Authority.