US Bridges

FM 770 over Mayhow Creek

Good

Hardin County, Texas · 1.80 MI S of SH 105 · Structure no. 201010109601019

Built
1950
75 years old, rebuilt 1982
Condition
Good
inspected March 2024
Type
Slab
Concrete
Length
50 ft
2 main spans
Daily traffic
2,941
2022 count
Owner
State
State Highway Agency

About this bridge

FM 770 over Mayhow Creek is a concrete slab carrying FM 770 over Mayhow Creek in Hardin County, Texas. It was built in 1950 and reconstructed in 1982, so it is 75 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 2,941 vehicles a day, roughly 17% of them trucks, projected to reach 3,360 by 2031. The structure is 50 ft (15.2 m) long and 46 ft wide. If it were closed, the detour would be 13 mi (21 km).

CarriesFM 770
CrossesMayhow Creek
Location1.80 MI S of SH 105
RouteState Highway 770
StateTexas
Coordinates30.22415, -94.60791
Functional classRural Major Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
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 evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating55 US tons
Inventory rating33 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans2
Design loadH 15
Structure length50 ft (15.2 m)
Longest span25 ft (7.6 m)
Deck width46 ft (14.1 m)
Roadway width45 ft (13.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,941 (2022)
Projected traffic3,360 by 2031
Trucks17%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed13 mi (21 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 770 over Mayhow Creek built?

It was built in 1950, making it 75 years old in 2025. It was reconstructed in 1982.

What condition is FM 770 over Mayhow Creek 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 March 2024.

How much traffic does FM 770 over Mayhow Creek carry?

About 2,941 vehicles per day (2022 count), of which roughly 17% are trucks.

How long is FM 770 over Mayhow Creek?

The structure is 50 ft (15.2 m) long with a longest span of 25 ft (7.6 m) and a deck 46 ft wide.

Who owns FM 770 over Mayhow Creek?

It is owned by the State Highway Agency.