US Bridges

US 377 over Leon Creek

Fair

Mason County, Texas · 10.7 MI SW of SH 29 · Structure no. 141570014904028

Built
1955
70 years old
Condition
Fair
inspected June 2023
Type
Slab
Concrete Continuous
Length
100 ft
4 main spans
Daily traffic
846
2020 count
Owner
State
State Highway Agency

About this bridge

US 377 over Leon Creek is a concrete continuous slab carrying US 377 over Leon Creek in Mason County, Texas. It was built in 1955, so it is 70 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 846 vehicles a day, roughly 12% of them trucks, projected to reach 960 by 2033. The structure is 100 ft (30.5 m) long and 30 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesUS 377
CrossesLeon Creek
Location10.7 MI SW of SH 29
RouteU.S. Route 377
CountyMason County
StateTexas
Coordinates30.75421, -99.47749
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating47 US tons
Inventory rating28 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadOther
Structure length100 ft (30.5 m)
Longest span25 ft (7.6 m)
Deck width30 ft (9.1 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic846 (2020)
Projected traffic960 by 2033
Trucks12%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 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 US 377 over Leon Creek built?

It was built in 1955, making it 70 years old in 2025.

What condition is US 377 over Leon 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 June 2023.

How much traffic does US 377 over Leon Creek carry?

About 846 vehicles per day (2020 count), of which roughly 12% are trucks.

How long is US 377 over Leon Creek?

The structure is 100 ft (30.5 m) long with a longest span of 25 ft (7.6 m) and a deck 30 ft wide.

Who owns US 377 over Leon Creek?

It is owned by the State Highway Agency.