US Bridges

FM 580 over Lampasas River

Fair

Lampasas County, Texas · 4.1 MI N of FM 2313 · Structure no. 231410103201016

Built
1965
60 years old
Condition
Fair
inspected November 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
262 ft
3 main spans
Daily traffic
906
2023 count
Owner
State
State Highway Agency

About this bridge

FM 580 over Lampasas River is a steel continuous stringer/multi-beam or girder carrying FM 580 over Lampasas River in Lampasas County, Texas. It was built in 1965, so it is 60 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 906 vehicles a day, roughly 13% of them trucks, projected to reach 880 by 2033. The structure is 262 ft (79.9 m) long and 26 ft wide. If it were closed, the detour would be 18 mi (29 km).

Location

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CarriesFM 580
CrossesLampasas River
Location4.1 MI N of FM 2313
RouteState Highway 580
CountyLampasas County
StateTexas
Coordinates31.17153, -98.07142
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating40 US tons
Inventory rating24 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3 (+1 approach)
Design loadH 20
Structure length262 ft (79.9 m)
Longest span90 ft (27.4 m)
Deck width26 ft (7.8 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic906 (2023)
Projected traffic880 by 2033
Trucks13%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed18 mi (29 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusEligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was FM 580 over Lampasas River built?

It was built in 1965, making it 60 years old in 2025.

What condition is FM 580 over Lampasas 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 November 2023.

How much traffic does FM 580 over Lampasas River carry?

About 906 vehicles per day (2023 count), of which roughly 13% are trucks.

How long is FM 580 over Lampasas River?

The structure is 262 ft (79.9 m) long with a longest span of 90 ft (27.4 m) and a deck 26 ft wide.

Who owns FM 580 over Lampasas River?

It is owned by the State Highway Agency.