US Bridges

FM 931 over Trib of Leon River

Good

Coryell County, Texas · 4.10 MI NE of SH 36 · Structure no. 090500122001003

Built
1956
69 years old
Condition
Good
inspected November 2024
Type
Culvert
Concrete
Length
23 ft
3 main spans
Daily traffic
172
2020 count
Owner
State
State Highway Agency

About this bridge

FM 931 over Trib of Leon River is a concrete culvert carrying FM 931 over Trib of Leon River in Coryell County, Texas. It was built in 1956, so it is 69 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 172 vehicles a day, roughly 17% of them trucks, projected to reach 310 by 2033. The structure is 23 ft (7 m) long and 41 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

CarriesFM 931
CrossesTrib of Leon River
Location4.10 MI NE of SH 36
RouteState Highway 931
StateTexas
Coordinates31.34227, -97.58338
Functional classRural Minor Collector

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 protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating44 US tons
Inventory rating26 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length23 ft (7 m)
Longest span6 ft (1.8 m)
Deck width41 ft (12.6 m)
Roadway width24 ft (7.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic172 (2020)
Projected traffic310 by 2033
Trucks17%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$400,000
NavigationNo navigation control on waterway

Frequently asked questions

When was FM 931 over Trib of Leon River built?

It was built in 1956, making it 69 years old in 2025.

What condition is FM 931 over Trib of Leon 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 931 over Trib of Leon River carry?

About 172 vehicles per day (2020 count), of which roughly 17% are trucks.

How long is FM 931 over Trib of Leon River?

The structure is 23 ft (7 m) long with a longest span of 6 ft (1.8 m) and a deck 41 ft wide.

Who owns FM 931 over Trib of Leon River?

It is owned by the State Highway Agency.