US Bridges

SH 99 NB over Westheimer Pkwy

Fair

Fort Bend County, Texas · 2.30 MI N of FM 1093 · Structure no. 120800351004010

Built
1994
31 years old
Condition
Fair
inspected October 2022
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
312 ft
3 main spans
Daily traffic
57,757
2019 count
Owner
State
State Highway Agency

About this bridge

SH 99 NB over Westheimer Pkwy is a prestressed concrete stringer/multi-beam or girder carrying SH 99 NB over Westheimer Pkwy in Fort Bend County, Texas. It was built in 1994, so it is 31 years old, younger 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 57,757 vehicles a day, roughly 4% of them trucks, projected to reach 30,040 by 2033. The structure is 312 ft (95.1 m) long and 43 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesSH 99 NB
CrossesWestheimer Pkwy
Location2.30 MI N of FM 1093
RouteState Highway 99
CountyFort Bend County
StateTexas
Coordinates29.73343, -95.77275
Functional classUrban Principal Arterial - Other Freeway or Expressway

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionOctober 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60 US tons
Inventory rating36 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans3
Design loadHS 20
Structure length312 ft (95.1 m)
Longest span122 ft (37.2 m)
Deck width43 ft (13 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic57,757 (2019)
Projected traffic30,040 by 2033
Trucks4%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
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 statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was SH 99 NB over Westheimer Pkwy built?

It was built in 1994, making it 31 years old in 2025.

What condition is SH 99 NB over Westheimer Pkwy 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 October 2022.

How much traffic does SH 99 NB over Westheimer Pkwy carry?

About 57,757 vehicles per day (2019 count), of which roughly 4% are trucks.

How long is SH 99 NB over Westheimer Pkwy?

The structure is 312 ft (95.1 m) long with a longest span of 122 ft (37.2 m) and a deck 43 ft wide.

Who owns SH 99 NB over Westheimer Pkwy?

It is owned by the State Highway Agency.