US Bridges

FM 770 over Longston Branch

Good

Hardin County, Texas · 0.30 MI W of SH 326 · Structure no. 201010109601001

Built
1935
90 years old, rebuilt 1982
Condition
Good
inspected April 2024
Type
Culvert
Concrete
Length
22 ft
3 main spans
Daily traffic
1,745
2022 count
Owner
State
State Highway Agency

About this bridge

FM 770 over Longston Branch is a concrete culvert carrying FM 770 over Longston Branch in Hardin County, Texas. It was built in 1935 and reconstructed in 1982, so it is 90 years old, older 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 1,745 vehicles a day, roughly 20% of them trucks, projected to reach 2,980 by 2033. The structure is 22 ft (6.7 m) long. If it were closed, the detour would be 6.2 mi (10 km).

CarriesFM 770
CrossesLongston Branch
Location0.30 MI W of SH 326
RouteState Highway 770
StateTexas
Coordinates30.34258, -94.35102
Functional classRural Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert7 GoodSome minor problems.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36 US tons
Inventory rating27 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadUnknown
Structure length22 ft (6.7 m)
Longest span7 ft (2.1 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,745 (2022)
Projected traffic2,980 by 2033
Trucks20%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was FM 770 over Longston Branch built?

It was built in 1935, making it 90 years old in 2025. It was reconstructed in 1982.

What condition is FM 770 over Longston Branch 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 April 2024.

How much traffic does FM 770 over Longston Branch carry?

About 1,745 vehicles per day (2022 count), of which roughly 20% are trucks.

How long is FM 770 over Longston Branch?

The structure is 22 ft (6.7 m) long with a longest span of 7 ft (2.1 m).

Who owns FM 770 over Longston Branch?

It is owned by the State Highway Agency.