US Bridges

IRR N3910 over Delaware Creek

Fair

Osage County, Oklahoma · 4 NW of Downtown Airpark · Structure no. 267790000000000

Built
2003
22 years old
Condition
Fair
inspected February 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
120 ft
3 main spans
Daily traffic
150
2022 count
Owner
County
County Highway Agency

About this bridge

IRR N3910 over Delaware Creek is a prestressed concrete stringer/multi-beam or girder carrying IRR N3910 over Delaware Creek in Osage County, Oklahoma. It was built in 2003, so it is 22 years old, younger 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 5 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 150 vehicles a day, roughly 10% of them trucks, projected to reach 240 by 2042. The structure is 120 ft (36.7 m) long and 28 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

CarriesIRR N3910
CrossesDelaware Creek
Location4 NW of Downtown Airpark
RouteCounty Highway N3910
Coordinates36.27216, -96.03152
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.
Superstructure8 Very GoodNo problems noted.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60.3 US tons
Inventory rating36 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadUnknown
Structure length120 ft (36.7 m)
Longest span50 ft (15.2 m)
Deck width28 ft (8.5 m)
Roadway width26 ft (8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic150 (2022)
Projected traffic240 by 2042
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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$636,000
NavigationNo navigation control on waterway

Frequently asked questions

When was IRR N3910 over Delaware Creek built?

It was built in 2003, making it 22 years old in 2025.

What condition is IRR N3910 over Delaware Creek 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 February 2024.

How much traffic does IRR N3910 over Delaware Creek carry?

About 150 vehicles per day (2022 count), of which roughly 10% are trucks.

How long is IRR N3910 over Delaware Creek?

The structure is 120 ft (36.7 m) long with a longest span of 50 ft (15.2 m) and a deck 28 ft wide.

Who owns IRR N3910 over Delaware Creek?

It is owned by the County Highway Agency.