FM 820 over Coahoma Draw

Fair

Howard County, Texas · 2.2 MI N of IH 20 · Structure no. 081150115601005

Built: 1961; 64 years old
Condition: Fair; inspected June 2023
Type: Culvert; Concrete
Length: 47 ft; 5 main spans
Daily traffic: 631; 2020 count
Owner: State; State Highway Agency

About this bridge

FM 820 over Coahoma Draw is a concrete culvert carrying FM 820 over Coahoma Draw in Howard County, Texas. It was built in 1961, so it is 64 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 631 vehicles a day, roughly 10% of them trucks, projected to reach 1,480 by 2035. The structure is 47 ft (14.3 m) long and 46 ft wide. If it were closed, the detour would be 24.9 mi (40 km).

Location

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CarriesFM 820

CrossesCoahoma Draw

Location2.2 MI N of IH 20

RouteState Highway 820

CountyHoward County

StateTexas

Coordinates32.32456, -101.31522

Functional classRural Major Collector

Condition and inspection

Fair

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

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

Last inspectionJune 2023

Inspection intervalevery 24 months

Operating statusOpen, no restriction

ScourFoundations stable; scour above top of footing

Structural evaluation6: Equal to present minimum criteria

Deck geometry9: Superior to present desirable 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 spans5

Design loadOther

Structure length47 ft (14.3 m)

Longest span9 ft (2.7 m)

Deck width46 ft (14 m)

Roadway width44 ft (13.4 m)

Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic631 (2020)

Projected traffic1,480 by 2035

Trucks10%

Lanes on structure2

Traffic directionTwo-way traffic

CarriesHighway

CrossesWaterway

Detour if closed24.9 mi (40 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 FM 820 over Coahoma Draw built?

It was built in 1961, making it 64 years old in 2025.

What condition is FM 820 over Coahoma 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 June 2023.

How much traffic does FM 820 over Coahoma Draw carry?

About 631 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is FM 820 over Coahoma Draw?

The structure is 47 ft (14.3 m) long with a longest span of 9 ft (2.7 m) and a deck 46 ft wide.

Who owns FM 820 over Coahoma Draw?

It is owned by the State Highway Agency.