US Bridges

SH 6 SB over Navasota River

Good

Brazos County, Texas · 1.95 MI SE of FM 2154 · Structure no. 170210005002014

Built
1930
95 years old, rebuilt 1990
Condition
Good
inspected February 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
509 ft
3 main spans
Daily traffic
11,534
2020 count
Owner
State
State Highway Agency

About this bridge

SH 6 SB over Navasota River is a steel continuous stringer/multi-beam or girder carrying SH 6 SB over Navasota River in Brazos County, Texas. It was built in 1930 and reconstructed in 1990, so it is 95 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 11,534 vehicles a day, roughly 14% of them trucks, projected to reach 18,890 by 2033. The structure is 509 ft (155.1 m) long and 41 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesSH 6 SB
CrossesNavasota River
Location1.95 MI SE of FM 2154
RouteState Highway 6
StateTexas
Coordinates30.41846, -96.10647
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48 US tons
Inventory rating28 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3 (+11 approach)
Design loadH 15
Structure length509 ft (155.1 m)
Longest span80 ft (24.4 m)
Deck width41 ft (12.5 m)
Roadway width37 ft (11.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,534 (2020)
Projected traffic18,890 by 2033
Trucks14%
Lanes on structure2
Traffic directionOne-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 SB over Navasota River built?

It was built in 1930, making it 95 years old in 2025. It was reconstructed in 1990.

What condition is SH 6 SB over Navasota River 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 February 2023.

How much traffic does SH 6 SB over Navasota River carry?

About 11,534 vehicles per day (2020 count), of which roughly 14% are trucks.

How long is SH 6 SB over Navasota River?

The structure is 509 ft (155.1 m) long with a longest span of 80 ft (24.4 m) and a deck 41 ft wide.

Who owns SH 6 SB over Navasota River?

It is owned by the State Highway Agency.