IH 20 over Coahoma Draw

Good

Howard County, Texas · 2.3 MI W of FM 821 · Structure no. 081150000506042

Built: 1955; 70 years old, rebuilt 1986
Condition: Good; inspected June 2023
Type: Culvert; Concrete
Length: 53 ft; 5 main spans
Daily traffic: 19,056; 2020 count
Owner: State; State Highway Agency

About this bridge

IH 20 over Coahoma Draw is a concrete culvert carrying IH 20 over Coahoma Draw in Howard County, Texas. It was built in 1955 and reconstructed in 1986, so it is 70 years old, older 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 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 19,056 vehicles a day, roughly 35% of them trucks, projected to reach 33,620 by 2035. The structure is 53 ft (16.2 m) long. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesIH 20

CrossesCoahoma Draw

Location2.3 MI W of FM 821

RouteInterstate 20

CountyHoward County

StateTexas

Coordinates32.29829, -101.27657

Functional classRural Principal Arterial - Interstate

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

Component	Rating	Meaning
Channel and channel protection	6 Satisfactory	Structural elements show some minor deterioration.
Culvert	7 Good	Some minor problems.

Last inspectionJune 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 spans5

Design loadH 20

Structure length53 ft (16.2 m)

Longest span10 ft (3 m)

Deck width0 ft (0 m)

Roadway width0 ft (0 m)

Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic19,056 (2020)

Projected traffic33,620 by 2035

Trucks35%

Lanes on structure9

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 Coahoma Draw built?

It was built in 1955, making it 70 years old in 2025. It was reconstructed in 1986.

What condition is IH 20 over Coahoma Draw 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 June 2023.

How much traffic does IH 20 over Coahoma Draw carry?

About 19,056 vehicles per day (2020 count), of which roughly 35% are trucks.

How long is IH 20 over Coahoma Draw?

The structure is 53 ft (16.2 m) long with a longest span of 10 ft (3 m).

Who owns IH 20 over Coahoma Draw?

It is owned by the State Highway Agency.