US Bridges

SH 37 over Sulphur River

Fair

Red River County, Texas · 6.9 MI S JCT US 271 · Structure no. 011940018904044

Built
1973
52 years old
Condition
Fair
inspected January 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
960 ft
12 main spans
Daily traffic
1,797
2019 count
Owner
State
State Highway Agency

About this bridge

SH 37 over Sulphur River is a prestressed concrete stringer/multi-beam or girder carrying SH 37 over Sulphur River in Red River County, Texas. It was built in 1973, so it is 52 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 5 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 1,797 vehicles a day, roughly 28% of them trucks, projected to reach 2,340 by 2033. The structure is 960 ft (292.6 m) long and 46 ft wide. If it were closed, the detour would be 24.9 mi (40 km).

CarriesSH 37
CrossesSulphur River
Location6.9 MI S JCT US 271
RouteState Highway 37
StateTexas
Coordinates33.36806, -95.23968
Functional classRural Minor Arterial

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionJanuary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour evaluation has not been made
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry8: Equal to present desirable criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60 US tons
Inventory rating36 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans12
Design loadHS 20
Structure length960 ft (292.6 m)
Longest span80 ft (24.4 m)
Deck width46 ft (14.1 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,797 (2019)
Projected traffic2,340 by 2033
Trucks28%
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 SH 37 over Sulphur River built?

It was built in 1973, making it 52 years old in 2025.

What condition is SH 37 over Sulphur River 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 January 2023.

How much traffic does SH 37 over Sulphur River carry?

About 1,797 vehicles per day (2019 count), of which roughly 28% are trucks.

How long is SH 37 over Sulphur River?

The structure is 960 ft (292.6 m) long with a longest span of 80 ft (24.4 m) and a deck 46 ft wide.

Who owns SH 37 over Sulphur River?

It is owned by the State Highway Agency.