US Bridges

FM 1478 over Sulphur Creek

Fair

Lampasas County, Texas · 0.80 MI NE of Burnet C/L · Structure no. 231410103203011

Built
1959
66 years old
Condition
Fair
inspected January 2024
Type
Stringer/Multi-beam or Girder
Concrete
Length
125 ft
3 main spans
Daily traffic
688
2020 count
Owner
State
State Highway Agency

About this bridge

FM 1478 over Sulphur Creek is a concrete stringer/multi-beam or girder carrying FM 1478 over Sulphur Creek in Lampasas County, Texas. It was built in 1959, so it is 66 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 688 vehicles a day, roughly 6% of them trucks, projected to reach 1,134 by 2038. The structure is 125 ft (38.1 m) long and 25 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesFM 1478
CrossesSulphur Creek
Location0.80 MI NE of Burnet C/L
RouteState Highway 1478
CountyLampasas County
StateTexas
Coordinates31.03591, -98.21389
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.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJanuary 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 rating58 US tons
Inventory rating34.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadOther
Structure length125 ft (38.1 m)
Longest span42 ft (12.8 m)
Deck width25 ft (7.5 m)
Roadway width24 ft (7.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic688 (2020)
Projected traffic1,134 by 2038
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost$8,000
NavigationNo navigation control on waterway

Frequently asked questions

When was FM 1478 over Sulphur Creek built?

It was built in 1959, making it 66 years old in 2025.

What condition is FM 1478 over Sulphur Creek 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 January 2024.

How much traffic does FM 1478 over Sulphur Creek carry?

About 688 vehicles per day (2020 count), of which roughly 6% are trucks.

How long is FM 1478 over Sulphur Creek?

The structure is 125 ft (38.1 m) long with a longest span of 42 ft (12.8 m) and a deck 25 ft wide.

Who owns FM 1478 over Sulphur Creek?

It is owned by the State Highway Agency.