US Bridges

SH 21 over Larrison Crk Relief No 1

Fair

Madison County, Texas · 3.22 MI NE of FM 1428 · Structure no. 171540011705081

Built
1968
57 years old
Condition
Fair
inspected June 2023
Type
Stringer/Multi-beam or Girder
Concrete
Length
120 ft
3 main spans
Daily traffic
5,633
2021 count
Owner
State
State Highway Agency

About this bridge

SH 21 over Larrison Crk Relief No 1 is a concrete stringer/multi-beam or girder carrying SH 21 over Larrison Crk Relief No 1 in Madison County, Texas. It was built in 1968, so it is 57 years old, older 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 5,633 vehicles a day, roughly 17% of them trucks, projected to reach 7,886 by 2041. The structure is 120 ft (36.6 m) long and 46 ft wide. If it were closed, the detour would be 14.9 mi (24 km).

Location

Open in Google Maps
CarriesSH 21
CrossesLarrison Crk Relief No 1
Location3.22 MI NE of FM 1428
RouteState Highway 21
CountyMadison County
StateTexas
Coordinates30.99926, -95.79434
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating52 US tons
Inventory rating31 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length120 ft (36.6 m)
Longest span40 ft (12.2 m)
Deck width46 ft (14.1 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,633 (2021)
Projected traffic7,886 by 2041
Trucks17%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesRelief for waterway
Detour if closed14.9 mi (24 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was SH 21 over Larrison Crk Relief No 1 built?

It was built in 1968, making it 57 years old in 2025.

What condition is SH 21 over Larrison Crk Relief No 1 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 June 2023.

How much traffic does SH 21 over Larrison Crk Relief No 1 carry?

About 5,633 vehicles per day (2021 count), of which roughly 17% are trucks.

How long is SH 21 over Larrison Crk Relief No 1?

The structure is 120 ft (36.6 m) long with a longest span of 40 ft (12.2 m) and a deck 46 ft wide.

Who owns SH 21 over Larrison Crk Relief No 1?

It is owned by the State Highway Agency.