US Bridges

SH 6 NB /Sl 340 SB over 12th ST

Fair

McLennan County, Texas · 3.2 MI E of IH 35 · Structure no. 091610025809095

Built
2007
18 years old
Condition
Fair
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 12th ST is a prestressed concrete stringer/multi-beam or girder carrying SH 6 NB /Sl 340 SB over 12th ST 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 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 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 39 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesSH 6 NB /Sl 340 SB
Crosses12th ST
Location3.2 MI E of IH 35
RouteState Highway 6
CountyMcLennan County
StateTexas
Coordinates31.50883, -97.1035
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
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 geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating75 US tons
Inventory rating45 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 25 or greater
Structure length295 ft (89.9 m)
Longest span98 ft (29.9 m)
Deck width39 ft (12 m)
Roadway width36 ft (11.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,711 (2017)
Projected traffic11,850 by 2037
Trucks8%
Lanes on structure2
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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was SH 6 NB /Sl 340 SB over 12th ST built?

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

What condition is SH 6 NB /Sl 340 SB over 12th ST 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 NB /Sl 340 SB over 12th ST 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 12th ST?

The structure is 295 ft (89.9 m) long with a longest span of 98 ft (29.9 m) and a deck 39 ft wide.

Who owns SH 6 NB /Sl 340 SB over 12th ST?

It is owned by the State Highway Agency.