US Bridges

FM 486 over Baird Slough

Good

Milam County, Texas · 1.4 MI N of FM 908 · Structure no. 171660059005057

Built
1984
41 years old
Condition
Good
inspected September 2024
Type
Stringer/Multi-beam or Girder
Concrete
Length
91 ft
3 main spans
Daily traffic
1,981
2023 count
Owner
State
State Highway Agency

About this bridge

FM 486 over Baird Slough is a concrete stringer/multi-beam or girder carrying FM 486 over Baird Slough in Milam County, Texas. It was built in 1984, so it is 41 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 1,981 vehicles a day, roughly 12% of them trucks, projected to reach 3,130 by 2042. The structure is 91 ft (27.7 m) long and 42 ft wide. If it were closed, the detour would be 19.3 mi (31 km).

CarriesFM 486
CrossesBaird Slough
Location1.4 MI N of FM 908
RouteState Highway 486
StateTexas
Coordinates30.69237, -97.19527
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating75 US tons
Inventory rating45 US tons

Structure

MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length91 ft (27.7 m)
Longest span30 ft (9.1 m)
Deck width42 ft (12.9 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,981 (2023)
Projected traffic3,130 by 2042
Trucks12%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed19.3 mi (31 km)
TollOn a free road
National Highway SystemNo

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 FM 486 over Baird Slough built?

It was built in 1984, making it 41 years old in 2025.

What condition is FM 486 over Baird Slough 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 September 2024.

How much traffic does FM 486 over Baird Slough carry?

About 1,981 vehicles per day (2023 count), of which roughly 12% are trucks.

How long is FM 486 over Baird Slough?

The structure is 91 ft (27.7 m) long with a longest span of 30 ft (9.1 m) and a deck 42 ft wide.

Who owns FM 486 over Baird Slough?

It is owned by the State Highway Agency.