US Bridges

FM 644 over Big Sandy Draw

Fair

Mitchell County, Texas · 4.3 MI S of IH 20 · Structure no. 081680096603007

Built
1959
66 years old, rebuilt 2004
Condition
Fair
inspected May 2023
Type
Culvert
Concrete
Length
40 ft
6 main spans
Daily traffic
187
2020 count
Owner
State
State Highway Agency

About this bridge

FM 644 over Big Sandy Draw is a concrete culvert carrying FM 644 over Big Sandy Draw in Mitchell County, Texas. It was built in 1959 and reconstructed in 2004, so it is 66 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 187 vehicles a day, roughly 11% of them trucks, projected to reach 370 by 2029. The structure is 40 ft (12.2 m) long and 41 ft wide. If it were closed, the detour would be 14.3 mi (23 km).

Location

Open in Google Maps
CarriesFM 644
CrossesBig Sandy Draw
Location4.3 MI S of IH 20
RouteState Highway 644
CountyMitchell County
StateTexas
Coordinates32.36071, -100.70879
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.

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 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 spans6
Design loadOther
Structure length40 ft (12.2 m)
Longest span6 ft (1.8 m)
Deck width41 ft (12.6 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic187 (2020)
Projected traffic370 by 2029
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.3 mi (23 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 644 over Big Sandy Draw built?

It was built in 1959, making it 66 years old in 2025. It was reconstructed in 2004.

What condition is FM 644 over Big Sandy 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 May 2023.

How much traffic does FM 644 over Big Sandy Draw carry?

About 187 vehicles per day (2020 count), of which roughly 11% are trucks.

How long is FM 644 over Big Sandy Draw?

The structure is 40 ft (12.2 m) long with a longest span of 6 ft (1.8 m) and a deck 41 ft wide.

Who owns FM 644 over Big Sandy Draw?

It is owned by the State Highway Agency.