US Bridges

S Post Oak RD SB over US 90A & UP RR

Good

Harris County, Texas · At US 90A / S Post Oak · Structure no. 121020B52313010

Built
1986
39 years old
Condition
Good
inspected August 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
1,120 ft
13 main spans
Daily traffic
10,000
2009 count
Owner
City
City or Municipal Highway Agency

About this bridge

S Post Oak RD SB over US 90A & UP RR is a prestressed concrete stringer/multi-beam or girder carrying S Post Oak RD SB over US 90A & UP RR in Harris County, Texas. It was built in 1986, so it is 39 years old, younger 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 10,000 vehicles a day, projected to reach 20,000 by 2029. The structure is 1,120 ft (341.4 m) long and 30 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesS Post Oak RD SB
CrossesUS 90A & UP RR
LocationAt US 90A / S Post Oak
RouteCity Street 0
CountyHarris County
StateTexas
Coordinates29.6487, -95.46386
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36 US tons
Inventory rating27 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans13
Design loadUnknown
Structure length1,120 ft (341.4 m)
Longest span103 ft (31.4 m)
Deck width30 ft (9 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deck19 ft (5.6 m)

Traffic and service

Average daily traffic10,000 (2009)
Projected traffic20,000 by 2029
Trucks0%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway and railroad
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$68,000
NavigationNot applicable (no waterway)

Frequently asked questions

When was S Post Oak RD SB over US 90A & UP RR built?

It was built in 1986, making it 39 years old in 2025.

What condition is S Post Oak RD SB over US 90A & UP RR 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 August 2023.

How much traffic does S Post Oak RD SB over US 90A & UP RR carry?

About 10,000 vehicles per day (2009 count).

How long is S Post Oak RD SB over US 90A & UP RR?

The structure is 1,120 ft (341.4 m) long with a longest span of 103 ft (31.4 m) and a deck 30 ft wide.

Who owns S Post Oak RD SB over US 90A & UP RR?

It is owned by the City or Municipal Highway Agency.