US Bridges

FM 309 over Horne Branch

Good

Hill County, Texas · 5.6 MI SE of FM 934 · Structure no. 091100088802001

Built
1948
77 years old
Condition
Good
inspected November 2024
Type
Slab
Concrete
Length
75 ft
3 main spans
Daily traffic
266
2020 count
Owner
State
State Highway Agency

About this bridge

FM 309 over Horne Branch is a concrete slab carrying FM 309 over Horne Branch in Hill County, Texas. It was built in 1948, so it is 77 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 266 vehicles a day, roughly 17% of them trucks, projected to reach 221 by 2039. The structure is 75 ft (22.9 m) long and 23 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesFM 309
CrossesHorne Branch
Location5.6 MI SE of FM 934
RouteState Highway 309
CountyHill County
StateTexas
Coordinates32.05067, -97.22762
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
Deck8 Very GoodNo problems noted.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than 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 alignment8: Equal to present desirable criteria
Operating rating63.9 US tons
Inventory rating32 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadH 15
Structure length75 ft (22.9 m)
Longest span25 ft (7.6 m)
Deck width23 ft (7.1 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic266 (2020)
Projected traffic221 by 2039
Trucks17%
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$411,000
NavigationNo navigation control on waterway

Frequently asked questions

When was FM 309 over Horne Branch built?

It was built in 1948, making it 77 years old in 2025.

What condition is FM 309 over Horne 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 November 2024.

How much traffic does FM 309 over Horne Branch carry?

About 266 vehicles per day (2020 count), of which roughly 17% are trucks.

How long is FM 309 over Horne Branch?

The structure is 75 ft (22.9 m) long with a longest span of 25 ft (7.6 m) and a deck 23 ft wide.

Who owns FM 309 over Horne Branch?

It is owned by the State Highway Agency.