US Bridges

SH 21 over Long Hollow

Good

Caldwell County, Texas · 3.8 MI E of US 183 · Structure no. 140280047104075

Built
1980
45 years old
Condition
Good
inspected October 2024
Type
Stringer/Multi-beam or Girder
Concrete
Length
120 ft
3 main spans
Daily traffic
15,461
2023 count
Owner
State
State Highway Agency

About this bridge

SH 21 over Long Hollow is a concrete stringer/multi-beam or girder carrying SH 21 over Long Hollow in Caldwell County, Texas. It was built in 1980, so it is 45 years old, older 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 15,461 vehicles a day, roughly 14% of them trucks, projected to reach 30,304 by 2042. The structure is 120 ft (36.6 m) long and 56 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

CarriesSH 21
CrossesLong Hollow
Location3.8 MI E of US 183
RouteState Highway 21
StateTexas
Coordinates30.05161, -97.63186
Functional classRural Principal Arterial - Other

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 inspectionOctober 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 adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating75 US tons
Inventory rating45 US tons

Structure

MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length120 ft (36.6 m)
Longest span40 ft (12.2 m)
Deck width56 ft (17.1 m)
Roadway width54 ft (16.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15,461 (2023)
Projected traffic30,304 by 2042
Trucks14%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 km)
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 Long Hollow built?

It was built in 1980, making it 45 years old in 2025.

What condition is SH 21 over Long Hollow 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 October 2024.

How much traffic does SH 21 over Long Hollow carry?

About 15,461 vehicles per day (2023 count), of which roughly 14% are trucks.

How long is SH 21 over Long Hollow?

The structure is 120 ft (36.6 m) long with a longest span of 40 ft (12.2 m) and a deck 56 ft wide.

Who owns SH 21 over Long Hollow?

It is owned by the State Highway Agency.