FM 766 over Willow Branch

Good

DeWitt County, Texas · 5.61 MI North of FM 953 · Structure no. 130620111301010

Built: 1959; 66 years old, rebuilt 2017
Condition: Good; inspected October 2024
Type: Culvert; Concrete
Length: 43 ft; 4 main spans
Daily traffic: 402; 2023 count
Owner: State; State Highway Agency

About this bridge

FM 766 over Willow Branch is a concrete culvert carrying FM 766 over Willow Branch in DeWitt County, Texas. It was built in 1959 and reconstructed in 2017, so it is 66 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 402 vehicles a day, roughly 20% of them trucks, projected to reach 840 by 2033. The structure is 43 ft (13.2 m) long and 39 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesFM 766

CrossesWillow Branch

Location5.61 MI North of FM 953

RouteState Highway 766

CountyDeWitt County

StateTexas

Coordinates29.22437, -97.3463

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.

Component	Rating	Meaning
Channel and channel protection	8 Very Good	No problems noted.
Culvert	7 Good	Some minor problems.

Last inspectionOctober 2024

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 adequacy7: Better than present minimum criteria

Approach roadway alignment8: Equal to present desirable criteria

Operating rating44 US tons

Inventory rating26 US tons

Structure

Structure typeCulvert

MaterialConcrete

DeckConcrete, cast-in-place

Main spans4

Design loadHS 20

Structure length43 ft (13.2 m)

Longest span10 ft (3 m)

Deck width39 ft (12 m)

Roadway width28 ft (8.5 m)

Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic402 (2023)

Projected traffic840 by 2033

Trucks20%

Lanes on structure2

Traffic directionTwo-way traffic

CarriesHighway

CrossesWaterway

Detour if closed5 mi (8 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 766 over Willow Branch built?

It was built in 1959, making it 66 years old in 2025. It was reconstructed in 2017.

What condition is FM 766 over Willow Branch 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 October 2024.

How much traffic does FM 766 over Willow Branch carry?

About 402 vehicles per day (2023 count), of which roughly 20% are trucks.

How long is FM 766 over Willow Branch?

The structure is 43 ft (13.2 m) long with a longest span of 10 ft (3 m) and a deck 39 ft wide.

Who owns FM 766 over Willow Branch?

It is owned by the State Highway Agency.