US Bridges

US 59 NB over Irons Bayou

Fair

Panola County, Texas · 0.70 MI S of FM 124 · Structure no. 191830006303077

Built
1974
51 years old
Condition
Fair
inspected June 2023
Type
Stringer/Multi-beam or Girder
Concrete
Length
560 ft
14 main spans
Daily traffic
4,522
2020 count
Owner
State
State Highway Agency

About this bridge

US 59 NB over Irons Bayou is a concrete stringer/multi-beam or girder carrying US 59 NB over Irons Bayou in Panola County, Texas. It was built in 1974, so it is 51 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 4,522 vehicles a day, roughly 31% of them trucks, projected to reach 7,070 by 2033. The structure is 560 ft (170.7 m) long and 44 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesUS 59 NB
CrossesIrons Bayou
Location0.70 MI S of FM 124
RouteU.S. Route 59
CountyPanola County
StateTexas
Coordinates32.23441, -94.35192
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating75 US tons
Inventory rating45 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialConcrete
DeckConcrete, cast-in-place
Main spans14
Design loadHS 20
Structure length560 ft (170.7 m)
Longest span40 ft (12.2 m)
Deck width44 ft (13.5 m)
Roadway width41 ft (12.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,522 (2020)
Projected traffic7,070 by 2033
Trucks31%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

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 US 59 NB over Irons Bayou built?

It was built in 1974, making it 51 years old in 2025.

What condition is US 59 NB over Irons Bayou 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 June 2023.

How much traffic does US 59 NB over Irons Bayou carry?

About 4,522 vehicles per day (2020 count), of which roughly 31% are trucks.

How long is US 59 NB over Irons Bayou?

The structure is 560 ft (170.7 m) long with a longest span of 40 ft (12.2 m) and a deck 44 ft wide.

Who owns US 59 NB over Irons Bayou?

It is owned by the State Highway Agency.