US Bridges

SH 31 EB over Post Oak CR

Fair

Navarro County, Texas · 1.90 MI E of IH45 · Structure no. 181750016301029

Built
1964
61 years old
Condition
Fair
inspected January 2024
Type
Stringer/Multi-beam or Girder
Concrete
Length
200 ft
5 main spans
Daily traffic
4,784
2019 count
Owner
State
State Highway Agency

About this bridge

SH 31 EB over Post Oak CR is a concrete stringer/multi-beam or girder carrying SH 31 EB over Post Oak CR in Navarro 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 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 4,784 vehicles a day, roughly 11% of them trucks, projected to reach 10,120 by 2033. The structure is 200 ft (61 m) long and 38 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesSH 31 EB
CrossesPost Oak CR
Location1.90 MI E of IH45
RouteState Highway 31
StateTexas
Coordinates32.10168, -96.40938
Functional classRural Principal Arterial - Other

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60 US tons
Inventory rating36 US tons

Structure

MaterialConcrete
DeckConcrete, cast-in-place
Main spans5
Design loadH 20
Structure length200 ft (61 m)
Longest span40 ft (12.2 m)
Deck width38 ft (11.6 m)
Roadway width37 ft (11.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,784 (2019)
Projected traffic10,120 by 2033
Trucks11%
Lanes on structure2
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 SH 31 EB over Post Oak CR built?

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

What condition is SH 31 EB over Post Oak CR 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 January 2024.

How much traffic does SH 31 EB over Post Oak CR carry?

About 4,784 vehicles per day (2019 count), of which roughly 11% are trucks.

How long is SH 31 EB over Post Oak CR?

The structure is 200 ft (61 m) long with a longest span of 40 ft (12.2 m) and a deck 38 ft wide.

Who owns SH 31 EB over Post Oak CR?

It is owned by the State Highway Agency.