US Bridges

FM 1860 over Tributary Brazos River

Good

McLennan County, Texas · 2.6 MI SW of SH 6 · Structure no. 091610083104013

Built
1956
69 years old, rebuilt 2008
Condition
Good
inspected December 2024
Type
Culvert
Concrete
Length
26 ft
4 main spans
Daily traffic
451
2023 count
Owner
State
State Highway Agency

About this bridge

FM 1860 over Tributary Brazos River is a concrete culvert carrying FM 1860 over Tributary Brazos River in McLennan County, Texas. It was built in 1956 and reconstructed in 2008, so it is 69 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 451 vehicles a day, roughly 14% of them trucks, projected to reach 510 by 2037. The structure is 26 ft (7.9 m) long and 40 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

CarriesFM 1860
CrossesTributary Brazos River
Location2.6 MI SW of SH 6
RouteState Highway 1860
StateTexas
Coordinates31.49546, -97.0084
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 protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
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
DeckConcrete, cast-in-place
Main spans4
Design loadOther
Structure length26 ft (7.9 m)
Longest span6 ft (1.8 m)
Deck width40 ft (12.2 m)
Roadway width25 ft (7.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic451 (2023)
Projected traffic510 by 2037
Trucks14%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.7 mi (14 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 FM 1860 over Tributary Brazos River built?

It was built in 1956, making it 69 years old in 2025. It was reconstructed in 2008.

What condition is FM 1860 over Tributary Brazos River 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 December 2024.

How much traffic does FM 1860 over Tributary Brazos River carry?

About 451 vehicles per day (2023 count), of which roughly 14% are trucks.

How long is FM 1860 over Tributary Brazos River?

The structure is 26 ft (7.9 m) long with a longest span of 6 ft (1.8 m) and a deck 40 ft wide.

Who owns FM 1860 over Tributary Brazos River?

It is owned by the State Highway Agency.