US Bridges

FM 486 over San Gabriel River

Fair

Milam County, Texas · 1.1 MI N of FM 908 · Structure no. 171660059005067

Built
2014
11 years old
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
265 ft
2 main spans
Daily traffic
1,981
2023 count
Owner
State
State Highway Agency

About this bridge

FM 486 over San Gabriel River is a prestressed concrete stringer/multi-beam or girder carrying FM 486 over San Gabriel River in Milam County, Texas. It was built in 2014, so it is 11 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 1,981 vehicles a day, roughly 12% of them trucks, projected to reach 3,031 by 2042. The structure is 265 ft (80.8 m) long and 46 ft wide. If it were closed, the detour would be 19.3 mi (31 km).

Location

Open in Google Maps
CarriesFM 486
CrossesSan Gabriel River
Location1.1 MI N of FM 908
RouteState Highway 486
CountyMilam County
StateTexas
Coordinates30.68764, -97.19328
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
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 evaluation6: Equal to 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 rating60 US tons
Inventory rating36 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2 (+1 approach)
Design loadHL 93
Structure length265 ft (80.8 m)
Longest span115 ft (35.1 m)
Deck width46 ft (14 m)
Roadway width43 ft (13 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,981 (2023)
Projected traffic3,031 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 San Gabriel River built?

It was built in 2014, making it 11 years old in 2025.

What condition is FM 486 over San Gabriel River 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 September 2024.

How much traffic does FM 486 over San Gabriel River carry?

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

How long is FM 486 over San Gabriel River?

The structure is 265 ft (80.8 m) long with a longest span of 115 ft (35.1 m) and a deck 46 ft wide.

Who owns FM 486 over San Gabriel River?

It is owned by the State Highway Agency.