US Bridges

FM 321 over Mound Prairie Creek

Fair

Anderson County, Texas · 1.1 MI E of FM 315 · Structure no. 100010089202008

Built
1965
60 years old
Condition
Fair
inspected December 2022
Type
Culvert
Concrete
Length
64 ft
6 main spans
Daily traffic
1,167
2020 count
Owner
State
State Highway Agency

About this bridge

FM 321 over Mound Prairie Creek is a concrete culvert carrying FM 321 over Mound Prairie Creek in Anderson 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 fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 1,167 vehicles a day, roughly 12% of them trucks, projected to reach 1,060 by 2033. The structure is 64 ft (19.5 m) long and 33 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

Open in Google Maps
CarriesFM 321
CrossesMound Prairie Creek
Location1.1 MI E of FM 315
RouteState Highway 321
CountyAnderson County
StateTexas
Coordinates31.87192, -95.60952
Functional classRural Major Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2022
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36 US tons
Inventory rating27 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans6
Design loadUnknown
Structure length64 ft (19.5 m)
Longest span10 ft (3 m)
Deck width33 ft (10.2 m)
Roadway width26 ft (8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,167 (2020)
Projected traffic1,060 by 2033
Trucks12%
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 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 321 over Mound Prairie Creek built?

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

What condition is FM 321 over Mound Prairie Creek in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in December 2022.

How much traffic does FM 321 over Mound Prairie Creek carry?

About 1,167 vehicles per day (2020 count), of which roughly 12% are trucks.

How long is FM 321 over Mound Prairie Creek?

The structure is 64 ft (19.5 m) long with a longest span of 10 ft (3 m) and a deck 33 ft wide.

Who owns FM 321 over Mound Prairie Creek?

It is owned by the State Highway Agency.