US Bridges

SH 21/71 EB over Loop 150 West

Good

Bastrop County, Texas · 2.8 MI E of FM 20 · Structure no. 140110026504110

Built
2005
20 years old
Condition
Good
inspected November 2022
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
222 ft
3 main spans
Daily traffic
24,545
2023 count
Owner
State
State Highway Agency

About this bridge

SH 21/71 EB over Loop 150 West is a prestressed concrete stringer/multi-beam or girder carrying SH 21/71 EB over Loop 150 West in Bastrop County, Texas. It was built in 2005, so it is 20 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 24,545 vehicles a day, roughly 5% of them trucks, projected to reach 21,870 by 2033. The structure is 222 ft (67.7 m) long and 40 ft wide.

CarriesSH 21/71 EB
CrossesLoop 150 West
Location2.8 MI E of FM 20
RouteState Highway 21
StateTexas
Coordinates30.1051, -97.32916
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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionNovember 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum 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 spans3
Design loadHS 20
Structure length222 ft (67.7 m)
Longest span76 ft (23.2 m)
Deck width40 ft (12.2 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic24,545 (2023)
Projected traffic21,870 by 2033
Trucks5%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
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 21/71 EB over Loop 150 West built?

It was built in 2005, making it 20 years old in 2025.

What condition is SH 21/71 EB over Loop 150 West 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 November 2022.

How much traffic does SH 21/71 EB over Loop 150 West carry?

About 24,545 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is SH 21/71 EB over Loop 150 West?

The structure is 222 ft (67.7 m) long with a longest span of 76 ft (23.2 m) and a deck 40 ft wide.

Who owns SH 21/71 EB over Loop 150 West?

It is owned by the State Highway Agency.