US Bridges

SH 21 over FM 812

Fair

Bastrop County, Texas · 0.9 MI E of Caldwell C/L · Structure no. 140110047105084

Built
2001
24 years old
Condition
Fair
inspected November 2022
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
197 ft
1 main span
Daily traffic
11,249
2019 count
Owner
State
State Highway Agency

About this bridge

SH 21 over FM 812 is a prestressed concrete stringer/multi-beam or girder carrying SH 21 over FM 812 in Bastrop County, Texas. It was built in 2001, so it is 24 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 11,249 vehicles a day, roughly 9% of them trucks, projected to reach 14,174 by 2039. The structure is 197 ft (60 m) long and 73 ft wide.

Location

Open in Google Maps
CarriesSH 21
CrossesFM 812
Location0.9 MI E of Caldwell C/L
RouteState Highway 21
CountyBastrop County
StateTexas
Coordinates30.07173, -97.57251
Functional classRural Principal Arterial - Other

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure8 Very GoodNo problems noted.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable 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, cast-in-place
Main spans1 (+2 approach)
Design loadHS 20
Structure length197 ft (60 m)
Longest span79 ft (24.1 m)
Deck width73 ft (22.2 m)
Roadway width71 ft (21.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,249 (2019)
Projected traffic14,174 by 2039
Trucks9%
Lanes on structure2
Traffic directionTwo-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—
NavigationNo navigation control on waterway

Frequently asked questions

When was SH 21 over FM 812 built?

It was built in 2001, making it 24 years old in 2025.

What condition is SH 21 over FM 812 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 November 2022.

How much traffic does SH 21 over FM 812 carry?

About 11,249 vehicles per day (2019 count), of which roughly 9% are trucks.

How long is SH 21 over FM 812?

The structure is 197 ft (60 m) long with a longest span of 79 ft (24.1 m) and a deck 73 ft wide.

Who owns SH 21 over FM 812?

It is owned by the State Highway Agency.