US Bridges

FM 20 over Walnut Creek

Good

Bastrop County, Texas · 1.7 MI N of FM 535 · Structure no. 140110011504024

Built
1994
31 years old
Condition
Good
inspected November 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
530 ft
6 main spans
Daily traffic
5,744
2023 count
Owner
State
State Highway Agency

About this bridge

FM 20 over Walnut Creek is a prestressed concrete stringer/multi-beam or girder carrying FM 20 over Walnut Creek in Bastrop 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 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 5,744 vehicles a day, roughly 9% of them trucks, projected to reach 4,300 by 2033. The structure is 530 ft (161.5 m) long and 52 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

CarriesFM 20
CrossesWalnut Creek
Location1.7 MI N of FM 535
RouteState Highway 20
StateTexas
Coordinates30.02802, -97.42642
Functional classRural Minor 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.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable 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 spans6
Design loadHS 20
Structure length530 ft (161.5 m)
Longest span93 ft (28.3 m)
Deck width52 ft (15.9 m)
Roadway width50 ft (15.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,744 (2023)
Projected traffic4,300 by 2033
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$318,000
NavigationNo navigation control on waterway

Frequently asked questions

When was FM 20 over Walnut Creek built?

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

What condition is FM 20 over Walnut Creek 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 2024.

How much traffic does FM 20 over Walnut Creek carry?

About 5,744 vehicles per day (2023 count), of which roughly 9% are trucks.

How long is FM 20 over Walnut Creek?

The structure is 530 ft (161.5 m) long with a longest span of 93 ft (28.3 m) and a deck 52 ft wide.

Who owns FM 20 over Walnut Creek?

It is owned by the State Highway Agency.