US Bridges

E1660 over Irrigation Canal

GoodPosted for load

Jackson County, Oklahoma · 283 &62 2.0 S & 0.5E · Structure no. 084290000000000

Built
1940
85 years old
Condition
Good
inspected June 2024
Type
Slab
Concrete
Length
34 ft
1 main span
Daily traffic
60
2022 count
Owner
County
County Highway Agency

About this bridge

E1660 over Irrigation Canal is a concrete slab carrying E1660 over Irrigation Canal in Jackson County, Oklahoma. It was built in 1940, so it is 85 years old, older than the Oklahoma average of 47.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. Its operating status is: posted for load restriction.

It carries about 60 vehicles a day, roughly 10% of them trucks, projected to reach 96 by 2042. The structure is 34 ft (10.4 m) long and 19 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesE1660
CrossesIrrigation Canal
Location283 &62 2.0 S & 0.5E
RouteCounty Highway E1660
CountyJackson County
StateOklahoma
Coordinates34.60868, -99.32516
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation2: Basically intolerable, requiring high priority of replacement
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 rating22 US tons
Inventory rating4 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length34 ft (10.4 m)
Longest span32 ft (9.9 m)
Deck width19 ft (5.7 m)
Roadway width18 ft (5.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic60 (2022)
Projected traffic96 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$285,000
NavigationNo navigation control on waterway

Frequently asked questions

When was E1660 over Irrigation Canal built?

It was built in 1940, making it 85 years old in 2025.

What condition is E1660 over Irrigation Canal in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in June 2024.

How much traffic does E1660 over Irrigation Canal carry?

About 60 vehicles per day (2022 count), of which roughly 10% are trucks.

How long is E1660 over Irrigation Canal?

The structure is 34 ft (10.4 m) long with a longest span of 32 ft (9.9 m) and a deck 19 ft wide.

Who owns E1660 over Irrigation Canal?

It is owned by the County Highway Agency.