US Bridges

FM 640 over Baughmans Slough

Good

Wharton County, Texas · 0.9 MI N of FM 102 · Structure no. 132410126003016

Built
1966
59 years old, rebuilt 2007
Condition
Good
inspected January 2023
Type
Culvert
Concrete
Length
30 ft
3 main spans
Daily traffic
424
2021 count
Owner
State
State Highway Agency

About this bridge

FM 640 over Baughmans Slough is a concrete culvert carrying FM 640 over Baughmans Slough in Wharton County, Texas. It was built in 1966 and reconstructed in 2007, so it is 59 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 424 vehicles a day, roughly 13% of them trucks, projected to reach 594 by 2041. The structure is 30 ft (9.1 m) long and 37 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesFM 640
CrossesBaughmans Slough
Location0.9 MI N of FM 102
RouteState Highway 640
StateTexas
Coordinates29.35613, -96.17195
Functional classRural Major Collector

Condition and inspection

Good

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

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionJanuary 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 alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating44 US tons
Inventory rating26 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length30 ft (9.1 m)
Longest span9 ft (2.7 m)
Deck width37 ft (11.4 m)
Roadway width35 ft (10.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic424 (2021)
Projected traffic594 by 2041
Trucks13%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 640 over Baughmans Slough built?

It was built in 1966, making it 59 years old in 2025. It was reconstructed in 2007.

What condition is FM 640 over Baughmans Slough 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 January 2023.

How much traffic does FM 640 over Baughmans Slough carry?

About 424 vehicles per day (2021 count), of which roughly 13% are trucks.

How long is FM 640 over Baughmans Slough?

The structure is 30 ft (9.1 m) long with a longest span of 9 ft (2.7 m) and a deck 37 ft wide.

Who owns FM 640 over Baughmans Slough?

It is owned by the State Highway Agency.