US Bridges

CR 51 over Austin Bayou

Good

Brazoria County, Texas · 0.20 MI E of SH 288 · Structure no. 120200D00946001

Built
2015
10 years old
Condition
Good
inspected October 2023
Type
Other
Prestressed Concrete
Length
50 ft
1 main span
Daily traffic
78
2013 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

CR 51 over Austin Bayou is a prestressed concrete other carrying CR 51 over Austin Bayou in Brazoria County, Texas. It was built in 2015, so it is 10 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 78 vehicles a day, projected to reach 158 by 2033. The structure is 50 ft (15.2 m) long and 30 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesCR 51
CrossesAustin Bayou
Location0.20 MI E of SH 288
RouteCounty Highway 0
CountyBrazoria County
StateTexas
Coordinates29.31726, -95.42056
Functional classRural Local

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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60 US tons
Inventory rating36 US tons

Structure

Structure typeOther
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length50 ft (15.2 m)
Longest span50 ft (15.2 m)
Deck width30 ft (9.1 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic78 (2013)
Projected traffic158 by 2033
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerTown or Township Highway Agency
Maintained byTown or Township Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$3,000
NavigationNo navigation control on waterway

Frequently asked questions

When was CR 51 over Austin Bayou built?

It was built in 2015, making it 10 years old in 2025.

What condition is CR 51 over Austin Bayou 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 October 2023.

How much traffic does CR 51 over Austin Bayou carry?

About 78 vehicles per day (2013 count).

How long is CR 51 over Austin Bayou?

The structure is 50 ft (15.2 m) long with a longest span of 50 ft (15.2 m) and a deck 30 ft wide.

Who owns CR 51 over Austin Bayou?

It is owned by the Town or Township Highway Agency.