US Bridges

31st ST SE over Branch of Big Sandy Crk

Good

Lamar County, Texas · 0.1 MI S of Mahaffey ST · Structure no. 011390B01290001

Built
1975
50 years old
Condition
Good
inspected November 2023
Type
Culvert
Concrete
Length
27 ft
3 main spans
Daily traffic
301
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

31st ST SE over Branch of Big Sandy Crk is a concrete culvert carrying 31st ST SE over Branch of Big Sandy Crk in Lamar County, Texas. It was built in 1975, so it is 50 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 301 vehicles a day, projected to reach 290 by 2030. The structure is 27 ft (8.2 m) long and 49 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
Carries31st ST SE
CrossesBranch of Big Sandy Crk
Location0.1 MI S of Mahaffey ST
RouteCity Street 0
CountyLamar County
StateTexas
Coordinates33.65302, -95.51965
Functional classRural Local

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 inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36 US tons
Inventory rating27 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadUnknown
Structure length27 ft (8.2 m)
Longest span7 ft (2.1 m)
Deck width49 ft (15 m)
Roadway width27 ft (8.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic301 (2023)
Projected traffic290 by 2030
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 31st ST SE over Branch of Big Sandy Crk built?

It was built in 1975, making it 50 years old in 2025.

What condition is 31st ST SE over Branch of Big Sandy Crk 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 November 2023.

How much traffic does 31st ST SE over Branch of Big Sandy Crk carry?

About 301 vehicles per day (2023 count).

How long is 31st ST SE over Branch of Big Sandy Crk?

The structure is 27 ft (8.2 m) long with a longest span of 7 ft (2.1 m) and a deck 49 ft wide.

Who owns 31st ST SE over Branch of Big Sandy Crk?

It is owned by the City or Municipal Highway Agency.