US Bridges

SP 581 over Duck Creek

Fair

Frio County, Texas · 0.02 MI N of FM 1582 · Structure no. 150830001715076

Built
1950
75 years old
Condition
Fair
inspected July 2024
Type
Culvert
Concrete
Length
75 ft
10 main spans
Daily traffic
3,391
2023 count
Owner
State
State Highway Agency

About this bridge

SP 581 over Duck Creek is a concrete culvert carrying SP 581 over Duck Creek in Frio County, Texas. It was built in 1950, so it is 75 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 3,391 vehicles a day, roughly 15% of them trucks, projected to reach 2,830 by 2033. The structure is 75 ft (22.9 m) long and 46 ft wide. If it were closed, the detour would be 31.1 mi (50 km).

Location

Open in Google Maps
CarriesSP 581
CrossesDuck Creek
Location0.02 MI N of FM 1582
RouteState Highway 581
CountyFrio County
StateTexas
Coordinates28.87197, -99.10219
Functional classUrban Other Principal Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour evaluation has not been made
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44 US tons
Inventory rating26 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans10
Design loadOther
Structure length75 ft (22.9 m)
Longest span7 ft (2.1 m)
Deck width46 ft (14 m)
Roadway width44 ft (13.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,391 (2023)
Projected traffic2,830 by 2033
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed31.1 mi (50 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 SP 581 over Duck Creek built?

It was built in 1950, making it 75 years old in 2025.

What condition is SP 581 over Duck 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 July 2024.

How much traffic does SP 581 over Duck Creek carry?

About 3,391 vehicles per day (2023 count), of which roughly 15% are trucks.

How long is SP 581 over Duck Creek?

The structure is 75 ft (22.9 m) long with a longest span of 7 ft (2.1 m) and a deck 46 ft wide.

Who owns SP 581 over Duck Creek?

It is owned by the State Highway Agency.