US Bridges

FM 81 over Salt Creek

Good

Karnes County, Texas · 6.5 MI SE of SH 80 · Structure no. 161290069101018

Built
2024
1 years old
Condition
Good
inspected May 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
180 ft
3 main spans
Daily traffic
3,100
2020 count
Owner
State
State Highway Agency

About this bridge

FM 81 over Salt Creek is a prestressed concrete stringer/multi-beam or girder carrying FM 81 over Salt Creek in Karnes County, Texas. It was built in 2024, so it is 1 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 3,100 vehicles a day, roughly 46% of them trucks, projected to reach 4,340 by 2040. The structure is 180 ft (54.9 m) long and 46 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesFM 81
CrossesSalt Creek
Location6.5 MI SE of SH 80
RouteState Highway 81
StateTexas
Coordinates28.91706, -97.73366
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60 US tons
Inventory rating36 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length180 ft (54.9 m)
Longest span65 ft (19.8 m)
Deck width46 ft (14 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,100 (2020)
Projected traffic4,340 by 2040
Trucks46%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 81 over Salt Creek built?

It was built in 2024, making it 1 years old in 2025.

What condition is FM 81 over Salt Creek 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 May 2024.

How much traffic does FM 81 over Salt Creek carry?

About 3,100 vehicles per day (2020 count), of which roughly 46% are trucks.

How long is FM 81 over Salt Creek?

The structure is 180 ft (54.9 m) long with a longest span of 65 ft (19.8 m) and a deck 46 ft wide.

Who owns FM 81 over Salt Creek?

It is owned by the State Highway Agency.