US Bridges

FM 777 over Big Walnut Run

Fair

Jasper County, Texas · 2.45 MI SE of US 190 · Structure no. 201220110901006

Built
1949
76 years old
Condition
Fair
inspected March 2024
Type
Slab
Concrete
Length
100 ft
4 main spans
Daily traffic
145
2024 count
Owner
State
State Highway Agency

About this bridge

FM 777 over Big Walnut Run is a concrete slab carrying FM 777 over Big Walnut Run in Jasper County, Texas. It was built in 1949, so it is 76 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 145 vehicles a day, roughly 11% of them trucks, projected to reach 182 by 2042. The structure is 100 ft (30.5 m) long and 23 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesFM 777
CrossesBig Walnut Run
Location2.45 MI SE of US 190
RouteState Highway 777
CountyJasper County
StateTexas
Coordinates30.84521, -94.10846
Functional classRural Minor 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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMarch 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 alignment6: Equal to present minimum criteria
Operating rating51 US tons
Inventory rating25 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans4
Design loadH 15
Structure length100 ft (30.5 m)
Longest span25 ft (7.6 m)
Deck width23 ft (7.1 m)
Roadway width21 ft (6.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic145 (2024)
Projected traffic182 by 2042
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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 777 over Big Walnut Run built?

It was built in 1949, making it 76 years old in 2025.

What condition is FM 777 over Big Walnut Run 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 March 2024.

How much traffic does FM 777 over Big Walnut Run carry?

About 145 vehicles per day (2024 count), of which roughly 11% are trucks.

How long is FM 777 over Big Walnut Run?

The structure is 100 ft (30.5 m) long with a longest span of 25 ft (7.6 m) and a deck 23 ft wide.

Who owns FM 777 over Big Walnut Run?

It is owned by the State Highway Agency.