US Bridges

Mile 4 1/2 West RD over Main Supply Canal

FairPosted for load

Hidalgo County, Texas · 0.1 MI N of Mile 19 N RD · Structure no. 211090T00655001

Built
1948
77 years old
Condition
Fair
inspected May 2024
Type
Stringer/Multi-beam or Girder
Concrete
Length
93 ft
3 main spans
Daily traffic
2,800
2010 count
Owner
County
County Highway Agency

About this bridge

Mile 4 1/2 West RD over Main Supply Canal is a concrete stringer/multi-beam or girder carrying Mile 4 1/2 West RD over Main Supply Canal in Hidalgo County, Texas. It was built in 1948, so it is 77 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 2,800 vehicles a day, roughly 1% of them trucks, projected to reach 3,000 by 2032. The structure is 93 ft (28.3 m) long and 25 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesMile 4 1/2 West RD
CrossesMain Supply Canal
Location0.1 MI N of Mile 19 N RD
RouteCounty Highway 0
CountyHidalgo County
StateTexas
Coordinates26.18646, -97.98312
Functional classUrban 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.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionMay 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 geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36 US tons
Inventory rating27 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadUnknown
Structure length93 ft (28.3 m)
Longest span30 ft (9.1 m)
Deck width25 ft (7.5 m)
Roadway width23 ft (6.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,800 (2010)
Projected traffic3,000 by 2032
Trucks1%
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$5,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Mile 4 1/2 West RD over Main Supply Canal built?

It was built in 1948, making it 77 years old in 2025.

What condition is Mile 4 1/2 West RD over Main Supply Canal 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 Mile 4 1/2 West RD over Main Supply Canal carry?

About 2,800 vehicles per day (2010 count), of which roughly 1% are trucks.

How long is Mile 4 1/2 West RD over Main Supply Canal?

The structure is 93 ft (28.3 m) long with a longest span of 30 ft (9.1 m) and a deck 25 ft wide.

Who owns Mile 4 1/2 West RD over Main Supply Canal?

It is owned by the County Highway Agency.