US Bridges

FM 3100 over Salt Creek

Good

Brown County, Texas · 6.35 MI N of US 67 · Structure no. 230250318001003

Built
1993
32 years old
Condition
Good
inspected March 2024
Type
Culvert
Concrete
Length
30 ft
3 main spans
Daily traffic
137
2020 count
Owner
State
State Highway Agency

About this bridge

FM 3100 over Salt Creek is a concrete culvert carrying FM 3100 over Salt Creek in Brown County, Texas. It was built in 1993, so it is 32 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 137 vehicles a day, roughly 6% of them trucks, projected to reach 260 by 2033. The structure is 30 ft (9.1 m) long. If it were closed, the detour would be 8.1 mi (13 km).

CarriesFM 3100
CrossesSalt Creek
Location6.35 MI N of US 67
RouteState Highway 3100
StateTexas
Coordinates31.84193, -98.88347
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 inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44 US tons
Inventory rating26 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadHS 20
Structure length30 ft (9.1 m)
Longest span9 ft (2.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic137 (2020)
Projected traffic260 by 2033
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 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 FM 3100 over Salt Creek built?

It was built in 1993, making it 32 years old in 2025.

What condition is FM 3100 over Salt Creek 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 March 2024.

How much traffic does FM 3100 over Salt Creek carry?

About 137 vehicles per day (2020 count), of which roughly 6% are trucks.

How long is FM 3100 over Salt Creek?

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

Who owns FM 3100 over Salt Creek?

It is owned by the State Highway Agency.