US Bridges

E1580 over Irrigation Canal

FairPosted for load

Jackson County, Oklahoma · 4S 0.1E of Blair · Structure no. 063520000000000

Built
1938
87 years old
Condition
Fair
inspected May 2024
Type
Slab
Concrete
Length
49 ft
2 main spans
Daily traffic
100
2022 count
Owner
County
County Highway Agency

About this bridge

E1580 over Irrigation Canal is a concrete slab carrying E1580 over Irrigation Canal in Jackson County, Oklahoma. It was built in 1938, so it is 87 years old, older than the Oklahoma average of 47.8 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. Its operating status is: posted for load restriction.

It carries about 100 vehicles a day, roughly 10% of them trucks, projected to reach 160 by 2042. The structure is 49 ft (14.9 m) long and 20 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesE1580
CrossesIrrigation Canal
Location4S 0.1E of Blair
RouteCounty Highway E1580
CountyJackson County
StateOklahoma
Coordinates34.72515, -99.33343
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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating33 US tons
Inventory rating19 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length49 ft (14.9 m)
Longest span25 ft (7.5 m)
Deck width20 ft (6 m)
Roadway width18 ft (5.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2022)
Projected traffic160 by 2042
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$347,000
NavigationNo navigation control on waterway

Frequently asked questions

When was E1580 over Irrigation Canal built?

It was built in 1938, making it 87 years old in 2025.

What condition is E1580 over Irrigation 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 E1580 over Irrigation Canal carry?

About 100 vehicles per day (2022 count), of which roughly 10% are trucks.

How long is E1580 over Irrigation Canal?

The structure is 49 ft (14.9 m) long with a longest span of 25 ft (7.5 m) and a deck 20 ft wide.

Who owns E1580 over Irrigation Canal?

It is owned by the County Highway Agency.