US Bridges

Louisiana ST over Mustang Bayou

Good

Brazoria County, Texas · 0.70 MI E of Mississippi · Structure no. 120200W00087001

Built
2013
12 years old
Condition
Good
inspected October 2024
Type
Slab
Prestressed Concrete
Length
112 ft
3 main spans
Daily traffic
230
2021 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

Louisiana ST over Mustang Bayou is a prestressed concrete slab carrying Louisiana ST over Mustang Bayou in Brazoria County, Texas. It was built in 2013, so it is 12 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 230 vehicles a day, roughly 3% of them trucks, projected to reach 330 by 2037. The structure is 112 ft (34.1 m) long and 27 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesLouisiana ST
CrossesMustang Bayou
Location0.70 MI E of Mississippi
RouteCity Street 0
CountyBrazoria County
StateTexas
Coordinates29.47449, -95.33262
Functional classUrban 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 2024
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60 US tons
Inventory rating36 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length112 ft (34.1 m)
Longest span40 ft (12.2 m)
Deck width27 ft (8.1 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic230 (2021)
Projected traffic330 by 2037
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerTown or Township Highway Agency
Maintained byTown or Township Highway Agency
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 Louisiana ST over Mustang Bayou built?

It was built in 2013, making it 12 years old in 2025.

What condition is Louisiana ST over Mustang 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 2024.

How much traffic does Louisiana ST over Mustang Bayou carry?

About 230 vehicles per day (2021 count), of which roughly 3% are trucks.

How long is Louisiana ST over Mustang Bayou?

The structure is 112 ft (34.1 m) long with a longest span of 40 ft (12.2 m) and a deck 27 ft wide.

Who owns Louisiana ST over Mustang Bayou?

It is owned by the Town or Township Highway Agency.