US Bridges

CR 146 over Mustang Bayou

Good

Brazoria County, Texas · 0.75 MI NE of SH 6 · Structure no. 120200AA0738102

Built
2019
6 years old
Condition
Good
inspected October 2023
Type
Other
Prestressed Concrete
Length
115 ft
5 main spans
Daily traffic
660
2017 count
Owner
County
County Highway Agency

About this bridge

CR 146 over Mustang Bayou is a prestressed concrete other carrying CR 146 over Mustang Bayou in Brazoria County, Texas. It was built in 2019, so it is 6 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 660 vehicles a day, projected to reach 880 by 2037. The structure is 115 ft (35.1 m) long and 28 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesCR 146
CrossesMustang Bayou
Location0.75 MI NE of SH 6
RouteCounty Highway 146
CountyBrazoria County
StateTexas
Coordinates29.45546, -95.28919
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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
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 spans5
Design loadHL 93
Structure length115 ft (35.1 m)
Longest span25 ft (7.6 m)
Deck width28 ft (8.5 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic660 (2017)
Projected traffic880 by 2037
Trucks0%
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

OwnerCounty Highway Agency
Maintained byCounty 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 CR 146 over Mustang Bayou built?

It was built in 2019, making it 6 years old in 2025.

What condition is CR 146 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 2023.

How much traffic does CR 146 over Mustang Bayou carry?

About 660 vehicles per day (2017 count).

How long is CR 146 over Mustang Bayou?

The structure is 115 ft (35.1 m) long with a longest span of 25 ft (7.6 m) and a deck 28 ft wide.

Who owns CR 146 over Mustang Bayou?

It is owned by the County Highway Agency.