US Bridges

Base Line RD over Arroyo Colorado

FairPosted for load

Hidalgo County, Texas · 1.1 MI N of Mile 4 N RD · Structure no. 211090AA0677001

Built
1950
75 years old
Condition
Fair
inspected April 2024
Type
Slab
Concrete
Length
50 ft
2 main spans
Daily traffic
113
2014 count
Owner
County
County Highway Agency

About this bridge

Base Line RD over Arroyo Colorado is a concrete slab carrying Base Line RD over Arroyo Colorado in Hidalgo County, Texas. It was built in 1950, so it is 75 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 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.

It carries about 113 vehicles a day, roughly 3% of them trucks, projected to reach 400 by 2042. The structure is 50 ft (15.2 m) long and 22 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesBase Line RD
CrossesArroyo Colorado
Location1.1 MI N of Mile 4 N RD
RouteCounty Highway 0
CountyHidalgo County
StateTexas
Coordinates26.12945, -97.90877
Functional classRural Local

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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating36 US tons
Inventory rating27 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length50 ft (15.2 m)
Longest span25 ft (7.6 m)
Deck width22 ft (6.6 m)
Roadway width18 ft (5.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic113 (2014)
Projected traffic400 by 2042
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$3,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Base Line RD over Arroyo Colorado built?

It was built in 1950, making it 75 years old in 2025.

What condition is Base Line RD over Arroyo Colorado 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 April 2024.

How much traffic does Base Line RD over Arroyo Colorado carry?

About 113 vehicles per day (2014 count), of which roughly 3% are trucks.

How long is Base Line RD over Arroyo Colorado?

The structure is 50 ft (15.2 m) long with a longest span of 25 ft (7.6 m) and a deck 22 ft wide.

Who owns Base Line RD over Arroyo Colorado?

It is owned by the County Highway Agency.