US Bridges

FM 391 over SH 6 & UPRR

Fair

Robertson County, Texas · 1.5 MI S of FM 485 · Structure no. 171980004908119

Built
1974
51 years old
Condition
Fair
inspected November 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
525 ft
1 main span
Daily traffic
5,578
2023 count
Owner
State
State Highway Agency

About this bridge

FM 391 over SH 6 & UPRR is a steel continuous stringer/multi-beam or girder carrying FM 391 over SH 6 & UPRR in Robertson County, Texas. It was built in 1974, so it is 51 years old, older than the Texas average of 44.4 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 5,578 vehicles a day, roughly 7% of them trucks, projected to reach 7,140 by 2042. The structure is 525 ft (160 m) long and 39 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
CarriesFM 391
CrossesSH 6 & UPRR
Location1.5 MI S of FM 485
RouteState Highway 391
CountyRobertson County
StateTexas
Coordinates30.87671, -96.59086
Functional classRural Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating40 US tons
Inventory rating24 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans1 (+3 approach)
Design loadHS 20
Structure length525 ft (160 m)
Longest span200 ft (61 m)
Deck width39 ft (11.9 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,578 (2023)
Projected traffic7,140 by 2042
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway and railroad
Detour if closed6.8 mi (11 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was FM 391 over SH 6 & UPRR built?

It was built in 1974, making it 51 years old in 2025.

What condition is FM 391 over SH 6 & UPRR in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in November 2024.

How much traffic does FM 391 over SH 6 & UPRR carry?

About 5,578 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is FM 391 over SH 6 & UPRR?

The structure is 525 ft (160 m) long with a longest span of 200 ft (61 m) and a deck 39 ft wide.

Who owns FM 391 over SH 6 & UPRR?

It is owned by the State Highway Agency.