US Bridges

SH 6 Nb/Sl 340 SB over FM 3400

Good

McLennan County, Texas · 4.3 MI E of IH 35 · Structure no. 091610025809097

Built
2007
18 years old
Condition
Good
inspected April 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
295 ft
3 main spans
Daily traffic
9,711
2017 count
Owner
State
State Highway Agency

About this bridge

SH 6 Nb/Sl 340 SB over FM 3400 is a prestressed concrete stringer/multi-beam or girder carrying SH 6 Nb/Sl 340 SB over FM 3400 in McLennan County, Texas. It was built in 2007, so it is 18 years old, younger 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 9,711 vehicles a day, roughly 8% of them trucks, projected to reach 11,850 by 2037. The structure is 295 ft (89.9 m) long and 47 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesSH 6 Nb/Sl 340 SB
CrossesFM 3400
Location4.3 MI E of IH 35
RouteState Highway 6
StateTexas
Coordinates31.51885, -97.08997
Functional classUrban Other Principal Arterial

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.
Last inspectionApril 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating75 US tons
Inventory rating45 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 25 or greater
Structure length295 ft (89.9 m)
Longest span108 ft (32.9 m)
Deck width47 ft (14.4 m)
Roadway width45 ft (13.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,711 (2017)
Projected traffic11,850 by 2037
Trucks8%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was SH 6 Nb/Sl 340 SB over FM 3400 built?

It was built in 2007, making it 18 years old in 2025.

What condition is SH 6 Nb/Sl 340 SB over FM 3400 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 April 2023.

How much traffic does SH 6 Nb/Sl 340 SB over FM 3400 carry?

About 9,711 vehicles per day (2017 count), of which roughly 8% are trucks.

How long is SH 6 Nb/Sl 340 SB over FM 3400?

The structure is 295 ft (89.9 m) long with a longest span of 108 ft (32.9 m) and a deck 47 ft wide.

Who owns SH 6 Nb/Sl 340 SB over FM 3400?

It is owned by the State Highway Agency.