US Bridges

RM 337 over Little Dry Frio River

Good

Real County, Texas · 5.8 MI E of US 83 · Structure no. 071930079202014

Built
2006
19 years old
Condition
Good
inspected July 2024
Type
Culvert
Concrete
Length
96 ft
10 main spans
Daily traffic
286
2023 count
Owner
State
State Highway Agency

About this bridge

RM 337 over Little Dry Frio River is a concrete culvert carrying RM 337 over Little Dry Frio River in Real County, Texas. It was built in 2006, so it is 19 years old, younger 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 286 vehicles a day, roughly 7% of them trucks, projected to reach 386 by 2042. The structure is 96 ft (29.3 m) long and 42 ft wide. If it were closed, the detour would be 47.2 mi (76 km).

CarriesRM 337
CrossesLittle Dry Frio River
Location5.8 MI E of US 83
RouteState Highway 337
StateTexas
Coordinates29.72146, -99.67447
Functional classUrban 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 inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than 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 rating60 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans10
Design loadHS 20
Structure length96 ft (29.3 m)
Longest span5 ft (1.5 m)
Deck width42 ft (12.8 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic286 (2023)
Projected traffic386 by 2042
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed47.2 mi (76 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was RM 337 over Little Dry Frio River built?

It was built in 2006, making it 19 years old in 2025.

What condition is RM 337 over Little Dry Frio River 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 July 2024.

How much traffic does RM 337 over Little Dry Frio River carry?

About 286 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is RM 337 over Little Dry Frio River?

The structure is 96 ft (29.3 m) long with a longest span of 5 ft (1.5 m) and a deck 42 ft wide.

Who owns RM 337 over Little Dry Frio River?

It is owned by the State Highway Agency.