US Bridges

FM 391 over Pin Oak Creek

Fair

Robertson County, Texas · 1.2 MI E of FM 2549 · Structure no. 171980026206029

Built
1947
78 years old
Condition
Fair
inspected November 2024
Type
Slab
Concrete
Length
75 ft
3 main spans
Daily traffic
233
2023 count
Owner
State
State Highway Agency

About this bridge

FM 391 over Pin Oak Creek is a concrete slab carrying FM 391 over Pin Oak Creek in Robertson County, Texas. It was built in 1947, so it is 78 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 233 vehicles a day, roughly 13% of them trucks, projected to reach 326 by 2042. The structure is 75 ft (22.9 m) long and 25 ft wide. If it were closed, the detour would be 11.8 mi (19 km).

Location

Open in Google Maps
CarriesFM 391
CrossesPin Oak Creek
Location1.2 MI E of FM 2549
RouteState Highway 391
CountyRobertson County
StateTexas
Coordinates30.88891, -96.51297
Functional classRural Major Collector

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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating63.9 US tons
Inventory rating33 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadH 15
Structure length75 ft (22.9 m)
Longest span25 ft (7.6 m)
Deck width25 ft (7.7 m)
Roadway width23 ft (7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic233 (2023)
Projected traffic326 by 2042
Trucks13%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.8 mi (19 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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost$404,000
NavigationNo navigation control on waterway

Frequently asked questions

When was FM 391 over Pin Oak Creek built?

It was built in 1947, making it 78 years old in 2025.

What condition is FM 391 over Pin Oak Creek 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 Pin Oak Creek carry?

About 233 vehicles per day (2023 count), of which roughly 13% are trucks.

How long is FM 391 over Pin Oak Creek?

The structure is 75 ft (22.9 m) long with a longest span of 25 ft (7.6 m) and a deck 25 ft wide.

Who owns FM 391 over Pin Oak Creek?

It is owned by the State Highway Agency.