US Bridges

SH 173 over Mile and a Half Creek

Fair

Atascosa County, Texas · 2.85 MI SE of FM 2504 · Structure no. 150070042104008

Built
1940
85 years old, rebuilt 2008
Condition
Fair
inspected May 2024
Type
Culvert
Concrete
Length
62 ft
5 main spans
Daily traffic
2,448
2020 count
Owner
State
State Highway Agency

About this bridge

SH 173 over Mile and a Half Creek is a concrete culvert carrying SH 173 over Mile and a Half Creek in Atascosa County, Texas. It was built in 1940 and reconstructed in 2008, so it is 85 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 2,448 vehicles a day, roughly 6% of them trucks, projected to reach 4,050 by 2033. The structure is 62 ft (18.9 m) long. If it were closed, the detour would be 16.2 mi (26 km).

Location

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CarriesSH 173
CrossesMile and a Half Creek
Location2.85 MI SE of FM 2504
RouteState Highway 173
CountyAtascosa County
StateTexas
Coordinates29.00539, -98.74927
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation6: Equal to present minimum 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
DeckNot applicable
Main spans5
Design loadH 15
Structure length62 ft (18.9 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,448 (2020)
Projected traffic4,050 by 2033
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed16.2 mi (26 km)
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 173 over Mile and a Half Creek built?

It was built in 1940, making it 85 years old in 2025. It was reconstructed in 2008.

What condition is SH 173 over Mile and a Half Creek 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 May 2024.

How much traffic does SH 173 over Mile and a Half Creek carry?

About 2,448 vehicles per day (2020 count), of which roughly 6% are trucks.

How long is SH 173 over Mile and a Half Creek?

The structure is 62 ft (18.9 m) long with a longest span of 10 ft (3 m).

Who owns SH 173 over Mile and a Half Creek?

It is owned by the State Highway Agency.