US Bridges

SH 171 over Trib W Nolan Creek N

Fair

Johnson County, Texas · 7.5 MI S of US 377 · Structure no. 021270036503008

Built
1938
87 years old, rebuilt 1959
Condition
Fair
inspected October 2024
Type
Culvert
Concrete
Length
24 ft
3 main spans
Daily traffic
6,470
2020 count
Owner
State
State Highway Agency

About this bridge

SH 171 over Trib W Nolan Creek N is a concrete culvert carrying SH 171 over Trib W Nolan Creek N in Johnson County, Texas. It was built in 1938 and reconstructed in 1959, so it is 87 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 6,470 vehicles a day, roughly 17% of them trucks, projected to reach 8,170 by 2033. The structure is 24 ft (7.3 m) long and 62 ft wide.

Location

Open in Google Maps
CarriesSH 171
CrossesTrib W Nolan Creek N
Location7.5 MI S of US 377
RouteState Highway 171
CountyJohnson County
StateTexas
Coordinates32.44996, -97.53542
Functional classRural Minor Arterial

Condition and inspection

Fair

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

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44 US tons
Inventory rating26 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadH 15
Structure length24 ft (7.3 m)
Longest span5 ft (1.5 m)
Deck width62 ft (18.9 m)
Roadway width54 ft (16.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,470 (2020)
Projected traffic8,170 by 2033
Trucks17%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
TollOn a free road
National Highway SystemNo

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 171 over Trib W Nolan Creek N built?

It was built in 1938, making it 87 years old in 2025. It was reconstructed in 1959.

What condition is SH 171 over Trib W Nolan Creek N 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 October 2024.

How much traffic does SH 171 over Trib W Nolan Creek N carry?

About 6,470 vehicles per day (2020 count), of which roughly 17% are trucks.

How long is SH 171 over Trib W Nolan Creek N?

The structure is 24 ft (7.3 m) long with a longest span of 5 ft (1.5 m) and a deck 62 ft wide.

Who owns SH 171 over Trib W Nolan Creek N?

It is owned by the State Highway Agency.