US Bridges

SH 108 over Trib of N Fk N Bosque Ri

Good

Erath County, Texas · 0.65 MI NW of FM 3025 · Structure no. 020730034304023

Built
1946
79 years old, rebuilt 1996
Condition
Good
inspected August 2024
Type
Culvert
Concrete
Length
27 ft
3 main spans
Daily traffic
2,780
2024 count
Owner
State
State Highway Agency

About this bridge

SH 108 over Trib of N Fk N Bosque Ri is a concrete culvert carrying SH 108 over Trib of N Fk N Bosque Ri in Erath County, Texas. It was built in 1946 and reconstructed in 1996, so it is 79 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 2,780 vehicles a day, roughly 14% of them trucks, projected to reach 2,760 by 2033. The structure is 27 ft (8.2 m) long and 85 ft wide. If it were closed, the detour would be 13 mi (21 km).

CarriesSH 108
CrossesTrib of N Fk N Bosque Ri
Location0.65 MI NW of FM 3025
RouteState Highway 108
StateTexas
Coordinates32.30755, -98.26178
Functional classRural Major Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert7 GoodSome minor problems.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44 US tons
Inventory rating26 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadH 15
Structure length27 ft (8.2 m)
Longest span6 ft (1.8 m)
Deck width85 ft (26 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,780 (2024)
Projected traffic2,760 by 2033
Trucks14%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed13 mi (21 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was SH 108 over Trib of N Fk N Bosque Ri built?

It was built in 1946, making it 79 years old in 2025. It was reconstructed in 1996.

What condition is SH 108 over Trib of N Fk N Bosque Ri 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 August 2024.

How much traffic does SH 108 over Trib of N Fk N Bosque Ri carry?

About 2,780 vehicles per day (2024 count), of which roughly 14% are trucks.

How long is SH 108 over Trib of N Fk N Bosque Ri?

The structure is 27 ft (8.2 m) long with a longest span of 6 ft (1.8 m) and a deck 85 ft wide.

Who owns SH 108 over Trib of N Fk N Bosque Ri?

It is owned by the State Highway Agency.