US Bridges

SH 99 over West Prong of Old River

Good

Liberty County, Texas · 2.0 MI S of US 90 · Structure no. 201460351009263

Built
2022
3 years old
Condition
Good
inspected July 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
122 ft
1 main span
Daily traffic
3,800
2022 count
Owner
State
State Highway Agency

About this bridge

SH 99 over West Prong of Old River is a prestressed concrete stringer/multi-beam or girder carrying SH 99 over West Prong of Old River in Liberty County, Texas. It was built in 2022, so it is 3 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 3,800 vehicles a day, roughly 10% of them trucks, projected to reach 16,650 by 2049. The structure is 122 ft (37.2 m) long and 46 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesSH 99
CrossesWest Prong of Old River
Location2.0 MI S of US 90
RouteState Highway 99
StateTexas
Coordinates29.98306, -94.92935
Functional classUrban Principal Arterial - Other Freeway or Expressway

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.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60 US tons
Inventory rating36 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length122 ft (37.2 m)
Longest span122 ft (37.2 m)
Deck width46 ft (14 m)
Roadway width44 ft (13.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,800 (2022)
Projected traffic16,650 by 2049
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 km)
TollToll bridge
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Toll Authority
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was SH 99 over West Prong of Old River built?

It was built in 2022, making it 3 years old in 2025.

What condition is SH 99 over West Prong of Old River 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 July 2024.

How much traffic does SH 99 over West Prong of Old River carry?

About 3,800 vehicles per day (2022 count), of which roughly 10% are trucks.

How long is SH 99 over West Prong of Old River?

The structure is 122 ft (37.2 m) long with a longest span of 122 ft (37.2 m) and a deck 46 ft wide.

Who owns SH 99 over West Prong of Old River?

It is owned by the State Highway Agency and maintained by the State Toll Authority.