US Bridges

SH 99 NB to IH 10 over IH 10 & SH 99

Fair

Harris County, Texas · At IH 10 & SH 99 Int · Structure no. 121020027106689

Built
2014
11 years old
Condition
Fair
inspected September 2024
Type
Box Beam or Girders - Multiple
Steel Continuous
Length
1,553 ft
6 main spans
Daily traffic
9,000
2012 count
Owner
State
State Highway Agency

About this bridge

SH 99 NB to IH 10 over IH 10 & SH 99 is a steel continuous box beam or girders - multiple carrying SH 99 NB to IH 10 over IH 10 & SH 99 in Harris County, Texas. It was built in 2014, so it is 11 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 9,000 vehicles a day, roughly 5% of them trucks, projected to reach 13,300 by 2032. The structure is 1,553 ft (473.4 m) long and 29 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesSH 99 NB to IH 10
CrossesIH 10 & SH 99
LocationAt IH 10 & SH 99 Int
RouteState Highway 99
StateTexas
Coordinates29.7833, -95.77699
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure8 Very GoodNo problems noted.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60 US tons
Inventory rating36 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans6 (+2 approach)
Design loadHL 93
Structure length1,553 ft (473.4 m)
Longest span295 ft (89.9 m)
Deck width29 ft (8.7 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deck19 ft (5.9 m)

Traffic and service

Average daily traffic9,000 (2012)
Projected traffic13,300 by 2032
Trucks5%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkSTRAHNET connector

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 to IH 10 over IH 10 & SH 99 built?

It was built in 2014, making it 11 years old in 2025.

What condition is SH 99 NB to IH 10 over IH 10 & SH 99 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 September 2024.

How much traffic does SH 99 NB to IH 10 over IH 10 & SH 99 carry?

About 9,000 vehicles per day (2012 count), of which roughly 5% are trucks.

How long is SH 99 NB to IH 10 over IH 10 & SH 99?

The structure is 1,553 ft (473.4 m) long with a longest span of 295 ft (89.9 m) and a deck 29 ft wide.

Who owns SH 99 NB to IH 10 over IH 10 & SH 99?

It is owned by the State Highway Agency.