US Bridges

SH 20 over Alamo Arroyo

Fair

Hudspeth County, Texas · 7.71 MI E of El Paso C/L · Structure no. 241160000204008

Built
1922
103 years old, rebuilt 1938
Condition
Fair
inspected August 2023
Type
Slab
Concrete
Length
146 ft
8 main spans
Daily traffic
735
2020 count
Owner
State
State Highway Agency

About this bridge

SH 20 over Alamo Arroyo is a concrete slab carrying SH 20 over Alamo Arroyo in Hudspeth County, Texas. It was built in 1922 and reconstructed in 1938, so it is 103 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 735 vehicles a day, roughly 5% of them trucks, projected to reach 850 by 2033. The structure is 146 ft (44.5 m) long and 33 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesSH 20
CrossesAlamo Arroyo
Location7.71 MI E of El Paso C/L
RouteState Highway 20
CountyHudspeth County
StateTexas
Coordinates31.31765, -105.89905
Functional classRural Major Collector

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.
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 inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36 US tons
Inventory rating27 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans8
Design loadUnknown
Structure length146 ft (44.5 m)
Longest span18 ft (5.5 m)
Deck width33 ft (10.2 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic735 (2020)
Projected traffic850 by 2033
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost$101,000
NavigationNo navigation control on waterway

Frequently asked questions

When was SH 20 over Alamo Arroyo built?

It was built in 1922, making it 103 years old in 2025. It was reconstructed in 1938.

What condition is SH 20 over Alamo Arroyo 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 August 2023.

How much traffic does SH 20 over Alamo Arroyo carry?

About 735 vehicles per day (2020 count), of which roughly 5% are trucks.

How long is SH 20 over Alamo Arroyo?

The structure is 146 ft (44.5 m) long with a longest span of 18 ft (5.5 m) and a deck 33 ft wide.

Who owns SH 20 over Alamo Arroyo?

It is owned by the State Highway Agency.