US Bridges

SH 6 SB / Sl 340NB over Brazos River

Fair

McLennan County, Texas · 4.0 MI E of US 77 · Structure no. 091610025809093

Built
1984
41 years old
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
630 ft
4 main spans
Daily traffic
16,451
2017 count
Owner
State
State Highway Agency

About this bridge

SH 6 SB / Sl 340NB over Brazos River is a prestressed concrete stringer/multi-beam or girder carrying SH 6 SB / Sl 340NB over Brazos River in McLennan County, Texas. It was built in 1984, so it is 41 years old, younger than the Texas average of 44.4 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 16,451 vehicles a day, roughly 9% of them trucks, projected to reach 23,037 by 2037. The structure is 630 ft (192 m) long and 42 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesSH 6 SB / Sl 340NB
CrossesBrazos River
Location4.0 MI E of US 77
RouteState Highway 6
CountyMcLennan County
StateTexas
Coordinates31.53605, -97.07402
Functional classUrban Other Principal Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.9 US tons
Inventory rating30 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4 (+6 approach)
Design loadHS 20
Structure length630 ft (192 m)
Longest span105 ft (32 m)
Deck width42 ft (12.8 m)
Roadway width39 ft (12 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic16,451 (2017)
Projected traffic23,037 by 2037
Trucks9%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway and waterway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$3.5 million
NavigationNo navigation control on waterway

Frequently asked questions

When was SH 6 SB / Sl 340NB over Brazos River built?

It was built in 1984, making it 41 years old in 2025.

What condition is SH 6 SB / Sl 340NB over Brazos River in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in April 2023.

How much traffic does SH 6 SB / Sl 340NB over Brazos River carry?

About 16,451 vehicles per day (2017 count), of which roughly 9% are trucks.

How long is SH 6 SB / Sl 340NB over Brazos River?

The structure is 630 ft (192 m) long with a longest span of 105 ft (32 m) and a deck 42 ft wide.

Who owns SH 6 SB / Sl 340NB over Brazos River?

It is owned by the State Highway Agency.