US Bridges

Spur 412 over Trib Tennant Branch

Fair

McLennan County, Texas · 1.1 MI SE of SH 6 · Structure no. 091610025811030

Built
1932
93 years old, rebuilt 1961
Condition
Fair
inspected March 2023
Type
Culvert
Concrete
Length
28 ft
5 main spans
Daily traffic
172
2020 count
Owner
State
State Highway Agency

About this bridge

Spur 412 over Trib Tennant Branch is a concrete culvert carrying Spur 412 over Trib Tennant Branch in McLennan County, Texas. It was built in 1932 and reconstructed in 1961, so it is 93 years old, older 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 172 vehicles a day, roughly 41% of them trucks, projected to reach 150 by 2037. The structure is 28 ft (8.5 m) long. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesSpur 412
CrossesTrib Tennant Branch
Location1.1 MI SE of SH 6
RouteState Highway 412
CountyMcLennan County
StateTexas
Coordinates31.57167, -97.28102
Functional classRural Major Collector

Condition and inspection

Fair

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

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating75 US tons
Inventory rating45 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans5
Design loadH 15
Structure length28 ft (8.5 m)
Longest span5 ft (1.5 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic172 (2020)
Projected traffic150 by 2037
Trucks41%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$400,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Spur 412 over Trib Tennant Branch built?

It was built in 1932, making it 93 years old in 2025. It was reconstructed in 1961.

What condition is Spur 412 over Trib Tennant Branch 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 March 2023.

How much traffic does Spur 412 over Trib Tennant Branch carry?

About 172 vehicles per day (2020 count), of which roughly 41% are trucks.

How long is Spur 412 over Trib Tennant Branch?

The structure is 28 ft (8.5 m) long with a longest span of 5 ft (1.5 m).

Who owns Spur 412 over Trib Tennant Branch?

It is owned by the State Highway Agency.