US Bridges

IH 20 over Iatan Creek

Fair

Mitchell County, Texas · 0.9 MI E of Howard CO LN · Structure no. 081680000507009

Built
1928
97 years old, rebuilt 1984
Condition
Fair
inspected May 2023
Type
Culvert
Concrete
Length
44 ft
8 main spans
Daily traffic
18,494
2020 count
Owner
State
State Highway Agency

About this bridge

IH 20 over Iatan Creek is a concrete culvert carrying IH 20 over Iatan Creek in Mitchell County, Texas. It was built in 1928 and reconstructed in 1984, so it is 97 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 18,494 vehicles a day, roughly 37% of them trucks, projected to reach 20,120 by 2033. The structure is 44 ft (13.4 m) long. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesIH 20
CrossesIatan Creek
Location0.9 MI E of Howard CO LN
RouteInterstate 20
CountyMitchell County
StateTexas
Coordinates32.33113, -101.16318
Functional classRural Principal Arterial - Interstate

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 protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44 US tons
Inventory rating26 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans8
Design loadH 15
Structure length44 ft (13.4 m)
Longest span8 ft (2.4 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic18,494 (2020)
Projected traffic20,120 by 2033
Trucks37%
Lanes on structure8
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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 IH 20 over Iatan Creek built?

It was built in 1928, making it 97 years old in 2025. It was reconstructed in 1984.

What condition is IH 20 over Iatan 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 May 2023.

How much traffic does IH 20 over Iatan Creek carry?

About 18,494 vehicles per day (2020 count), of which roughly 37% are trucks.

How long is IH 20 over Iatan Creek?

The structure is 44 ft (13.4 m) long with a longest span of 8 ft (2.4 m).

Who owns IH 20 over Iatan Creek?

It is owned by the State Highway Agency.