US Bridges

FM 2780 over Alum Creek

Good

Washington County, Texas · 0.95 MI NE of FM 1697 · Structure no. 172390156401012

Built
1965
60 years old
Condition
Good
inspected April 2023
Type
Culvert
Concrete
Length
34 ft
4 main spans
Daily traffic
187
2020 count
Owner
State
State Highway Agency

About this bridge

FM 2780 over Alum Creek is a concrete culvert carrying FM 2780 over Alum Creek in Washington County, Texas. It was built in 1965, so it is 60 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 187 vehicles a day, roughly 12% of them trucks, projected to reach 290 by 2033. The structure is 34 ft (10.4 m) long. If it were closed, the detour would be 6.2 mi (10 km).

CarriesFM 2780
CrossesAlum Creek
Location0.95 MI NE of FM 1697
RouteState Highway 2780
StateTexas
Coordinates30.24659, -96.67742
Functional classRural Minor 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 inspectionApril 2023
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 spans4
Design loadHS 20
Structure length34 ft (10.4 m)
Longest span8 ft (2.4 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic187 (2020)
Projected traffic290 by 2033
Trucks12%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 2780 over Alum Creek built?

It was built in 1965, making it 60 years old in 2025.

What condition is FM 2780 over Alum 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 April 2023.

How much traffic does FM 2780 over Alum Creek carry?

About 187 vehicles per day (2020 count), of which roughly 12% are trucks.

How long is FM 2780 over Alum Creek?

The structure is 34 ft (10.4 m) long with a longest span of 8 ft (2.4 m).

Who owns FM 2780 over Alum Creek?

It is owned by the State Highway Agency.