US Bridges

SP 581 over UPRR

Fair

Frio County, Texas · 1.15 MI N of FM 1583 · Structure no. 150830001715035

Built
1938
87 years old
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
270 ft
6 main spans
Daily traffic
1,409
2020 count
Owner
State
State Highway Agency

About this bridge

SP 581 over UPRR is a steel stringer/multi-beam or girder carrying SP 581 over UPRR in Frio County, Texas. It was built in 1938, so it is 87 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 1,409 vehicles a day, roughly 12% of them trucks, projected to reach 2,600 by 2033. The structure is 270 ft (82.3 m) long and 32 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesSP 581
CrossesUPRR
Location1.15 MI N of FM 1583
RouteState Highway 581
CountyFrio County
StateTexas
Coordinates28.78467, -99.12796
Functional classRural Principal Arterial - Other

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.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.9 US tons
Inventory rating29 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans6
Design loadH 15
Structure length270 ft (82.3 m)
Longest span45 ft (13.7 m)
Deck width32 ft (9.8 m)
Roadway width27 ft (8.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,409 (2020)
Projected traffic2,600 by 2033
Trucks12%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesRailroad
Detour if closed5 mi (8 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$785,000
NavigationNot applicable (no waterway)

Frequently asked questions

When was SP 581 over UPRR built?

It was built in 1938, making it 87 years old in 2025.

What condition is SP 581 over UPRR 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 July 2024.

How much traffic does SP 581 over UPRR carry?

About 1,409 vehicles per day (2020 count), of which roughly 12% are trucks.

How long is SP 581 over UPRR?

The structure is 270 ft (82.3 m) long with a longest span of 45 ft (13.7 m) and a deck 32 ft wide.

Who owns SP 581 over UPRR?

It is owned by the State Highway Agency.