US Bridges

SH 91 over Post Oak Crk Trib

Fair

Grayson County, Texas · 1.0 MI S of US 82 · Structure no. 010920004718032

Built
1943
82 years old
Condition
Fair
inspected May 2023
Type
Culvert
Concrete
Length
24 ft
3 main spans
Daily traffic
13,766
2020 count
Owner
State
State Highway Agency

About this bridge

SH 91 over Post Oak Crk Trib is a concrete culvert carrying SH 91 over Post Oak Crk Trib in Grayson County, Texas. It was built in 1943, so it is 82 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 13,766 vehicles a day, roughly 16% of them trucks, projected to reach 30,130 by 2030. The structure is 24 ft (7.3 m) long. If it were closed, the detour would be 1.2 mi (2 km).

CarriesSH 91
CrossesPost Oak Crk Trib
Location1.0 MI S of US 82
RouteState Highway 91
StateTexas
Coordinates33.6565, -96.61235
Functional classUrban Other Principal Arterial

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 inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour evaluation has not been made
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
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
DeckNot applicable
Main spans3
Design loadH 20
Structure length24 ft (7.3 m)
Longest span7 ft (2.1 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic13,766 (2020)
Projected traffic30,130 by 2030
Trucks16%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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 91 over Post Oak Crk Trib built?

It was built in 1943, making it 82 years old in 2025.

What condition is SH 91 over Post Oak Crk Trib 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 May 2023.

How much traffic does SH 91 over Post Oak Crk Trib carry?

About 13,766 vehicles per day (2020 count), of which roughly 16% are trucks.

How long is SH 91 over Post Oak Crk Trib?

The structure is 24 ft (7.3 m) long with a longest span of 7 ft (2.1 m).

Who owns SH 91 over Post Oak Crk Trib?

It is owned by the State Highway Agency.