US Bridges

SP 581 over Draw

Fair

Frio County, Texas · 5.42 MI S of FM 1582 · Structure no. 150830001715078

Built
1950
75 years old
Condition
Fair
inspected July 2024
Type
Culvert
Concrete
Length
38 ft
5 main spans
Daily traffic
1,409
2020 count
Owner
State
State Highway Agency

About this bridge

SP 581 over Draw is a concrete culvert carrying SP 581 over Draw 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 5 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 38 ft (11.6 m) long and 51 ft wide. If it were closed, the detour would be 21.7 mi (35 km).

Location

Open in Google Maps
CarriesSP 581
CrossesDraw
Location5.42 MI S of FM 1582
RouteState Highway 581
CountyFrio County
StateTexas
Coordinates28.79524, -99.12445
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
Channel and channel protection8 Very GoodNo problems noted.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour evaluation has not been made
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Waterway adequacy3: Basically intolerable, requiring high priority of corrective action
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 spans5
Design loadOther
Structure length38 ft (11.6 m)
Longest span7 ft (2.1 m)
Deck width51 ft (15.6 m)
Roadway width50 ft (15.2 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
CrossesWaterway
Detour if closed21.7 mi (35 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$5,000
NavigationNo navigation control on waterway

Frequently asked questions

When was SP 581 over Draw built?

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

What condition is SP 581 over Draw 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 Draw carry?

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

How long is SP 581 over Draw?

The structure is 38 ft (11.6 m) long with a longest span of 7 ft (2.1 m) and a deck 51 ft wide.

Who owns SP 581 over Draw?

It is owned by the State Highway Agency.