US Bridges

FM 486 over Little River Slough

Fair

Milam County, Texas · 4.2 MI S of US 190 · Structure no. 171660033705027

Built
1960
65 years old
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Concrete
Length
160 ft
4 main spans
Daily traffic
1,111
2023 count
Owner
State
State Highway Agency

About this bridge

FM 486 over Little River Slough is a concrete stringer/multi-beam or girder carrying FM 486 over Little River Slough in Milam County, Texas. It was built in 1960, so it is 65 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 1,111 vehicles a day, roughly 13% of them trucks, projected to reach 1,911 by 2042. The structure is 160 ft (48.8 m) long and 26 ft wide. If it were closed, the detour would be 11.8 mi (19 km).

Location

Open in Google Maps
CarriesFM 486
CrossesLittle River Slough
Location4.2 MI S of US 190
RouteState Highway 486
CountyMilam County
StateTexas
Coordinates30.80141, -97.11136
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating56 US tons
Inventory rating34 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialConcrete
DeckConcrete, cast-in-place
Main spans4
Design loadOther
Structure length160 ft (48.8 m)
Longest span40 ft (12.2 m)
Deck width26 ft (7.8 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,111 (2023)
Projected traffic1,911 by 2042
Trucks13%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.8 mi (19 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 FM 486 over Little River Slough built?

It was built in 1960, making it 65 years old in 2025.

What condition is FM 486 over Little River Slough 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 Little River Slough carry?

About 1,111 vehicles per day (2023 count), of which roughly 13% are trucks.

How long is FM 486 over Little River Slough?

The structure is 160 ft (48.8 m) long with a longest span of 40 ft (12.2 m) and a deck 26 ft wide.

Who owns FM 486 over Little River Slough?

It is owned by the State Highway Agency.