US Bridges

FM 2818 SB over Cottonwood Branch

Good

Brazos County, Texas · 0.7 MI SE of SH 21 · Structure no. 170210285101001

Built
1964
61 years old
Condition
Good
inspected February 2023
Type
Culvert
Concrete
Length
30 ft
3 main spans
Daily traffic
8,968
2021 count
Owner
State
State Highway Agency

About this bridge

FM 2818 SB over Cottonwood Branch is a concrete culvert carrying FM 2818 SB over Cottonwood Branch in Brazos County, Texas. It was built in 1964, so it is 61 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 8,968 vehicles a day, roughly 7% of them trucks, projected to reach 12,555 by 2041. The structure is 30 ft (9.1 m) long and 69 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesFM 2818 SB
CrossesCottonwood Branch
Location0.7 MI SE of SH 21
RouteState Highway 2818
CountyBrazos County
StateTexas
Coordinates30.65736, -96.40328
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 protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44 US tons
Inventory rating26 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length30 ft (9.1 m)
Longest span9 ft (2.7 m)
Deck width69 ft (21.1 m)
Roadway width52 ft (16 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,968 (2021)
Projected traffic12,555 by 2041
Trucks7%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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 SB over Cottonwood Branch built?

It was built in 1964, making it 61 years old in 2025.

What condition is FM 2818 SB over Cottonwood 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 SB over Cottonwood Branch carry?

About 8,968 vehicles per day (2021 count), of which roughly 7% are trucks.

How long is FM 2818 SB over Cottonwood Branch?

The structure is 30 ft (9.1 m) long with a longest span of 9 ft (2.7 m) and a deck 69 ft wide.

Who owns FM 2818 SB over Cottonwood Branch?

It is owned by the State Highway Agency.