US Bridges

SH 6 over Chair Branch

Good

Robertson County, Texas · 0.2 MI N of SH 14 · Structure no. 171980004906160

Built
1967
58 years old, rebuilt 2007
Condition
Good
inspected November 2024
Type
Culvert
Concrete
Length
25 ft
4 main spans
Daily traffic
8,279
2023 count
Owner
State
State Highway Agency

About this bridge

SH 6 over Chair Branch is a concrete culvert carrying SH 6 over Chair Branch in Robertson County, Texas. It was built in 1967 and reconstructed in 2007, so it is 58 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 8,279 vehicles a day, roughly 40% of them trucks, projected to reach 14,737 by 2042. The structure is 25 ft (7.7 m) long. If it were closed, the detour would be 1.2 mi (2 km).

CarriesSH 6
CrossesChair Branch
Location0.2 MI N of SH 14
RouteState Highway 6
StateTexas
Coordinates31.11783, -96.71199
Functional classRural Principal Arterial - Other

Condition and inspection

Good

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

ComponentRatingMeaning
Channel and channel protection8 Very GoodNo problems noted.
Culvert7 GoodSome minor problems.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44 US tons
Inventory rating26 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans4
Design loadHS 20
Structure length25 ft (7.7 m)
Longest span6 ft (1.8 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,279 (2023)
Projected traffic14,737 by 2042
Trucks40%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

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 SH 6 over Chair Branch built?

It was built in 1967, making it 58 years old in 2025. It was reconstructed in 2007.

What condition is SH 6 over Chair 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 SH 6 over Chair Branch carry?

About 8,279 vehicles per day (2023 count), of which roughly 40% are trucks.

How long is SH 6 over Chair Branch?

The structure is 25 ft (7.7 m) long with a longest span of 6 ft (1.8 m).

Who owns SH 6 over Chair Branch?

It is owned by the State Highway Agency.