US Bridges

FM 2818 over Thompson Branch

Good

Brazos County, Texas · 2.15 MI NW of SH 21 · Structure no. 170210285101003

Built
1975
50 years old
Condition
Good
inspected February 2023
Type
Culvert
Concrete
Length
78 ft
7 main spans
Daily traffic
6,229
2020 count
Owner
State
State Highway Agency

About this bridge

FM 2818 over Thompson Branch is a concrete culvert carrying FM 2818 over Thompson Branch in Brazos 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 6,229 vehicles a day, roughly 3% of them trucks, projected to reach 7,370 by 2033. The structure is 78 ft (23.8 m) long. If it were closed, the detour would be 3.7 mi (6 km).

CarriesFM 2818
CrossesThompson Branch
Location2.15 MI NW of SH 21
RouteState Highway 2818
StateTexas
Coordinates30.69299, -96.42993
Functional classUrban Other Principal Arterial

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 protection8 Very GoodNo problems noted.
Culvert7 GoodSome minor problems.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44 US tons
Inventory rating26 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans7
Design loadHS 20
Structure length78 ft (23.8 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,229 (2020)
Projected traffic7,370 by 2033
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemYes

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 2818 over Thompson Branch built?

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

What condition is FM 2818 over Thompson Branch 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 February 2023.

How much traffic does FM 2818 over Thompson Branch carry?

About 6,229 vehicles per day (2020 count), of which roughly 3% are trucks.

How long is FM 2818 over Thompson Branch?

The structure is 78 ft (23.8 m) long with a longest span of 10 ft (3 m).

Who owns FM 2818 over Thompson Branch?

It is owned by the State Highway Agency.