US Bridges

FM 456 over Tres Palacios River

Good

Matagorda County, Texas · 2.20 MI E of SH 71 · Structure no. 131580034612019

Built
1988
37 years old
Condition
Good
inspected November 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
155 ft
3 main spans
Daily traffic
71
2023 count
Owner
State
State Highway Agency

About this bridge

FM 456 over Tres Palacios River is a prestressed concrete stringer/multi-beam or girder carrying FM 456 over Tres Palacios River in Matagorda County, Texas. It was built in 1988, so it is 37 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 71 vehicles a day, roughly 11% of them trucks, projected to reach 99 by 2042. The structure is 155 ft (47.2 m) long and 30 ft wide.

CarriesFM 456
CrossesTres Palacios River
Location2.20 MI E of SH 71
RouteState Highway 456
StateTexas
Coordinates28.92808, -96.17117
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 inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to 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

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length155 ft (47.2 m)
Longest span55 ft (16.8 m)
Deck width30 ft (9.1 m)
Roadway width27 ft (8.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic71 (2023)
Projected traffic99 by 2042
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 FM 456 over Tres Palacios River built?

It was built in 1988, making it 37 years old in 2025.

What condition is FM 456 over Tres Palacios River 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 November 2024.

How much traffic does FM 456 over Tres Palacios River carry?

About 71 vehicles per day (2023 count), of which roughly 11% are trucks.

How long is FM 456 over Tres Palacios River?

The structure is 155 ft (47.2 m) long with a longest span of 55 ft (16.8 m) and a deck 30 ft wide.

Who owns FM 456 over Tres Palacios River?

It is owned by the State Highway Agency.