US Bridges

IRR N3925 (osage) over Flat Rock Creek

Good

Osage County, Oklahoma · .5N of 36th Street N. · Structure no. 308150000000000

Built
2013
12 years old
Condition
Good
inspected February 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
108 ft
1 main span
Daily traffic
960
2022 count
Owner
County
County Highway Agency

About this bridge

IRR N3925 (osage) over Flat Rock Creek is a prestressed concrete stringer/multi-beam or girder carrying IRR N3925 (osage) over Flat Rock Creek in Osage County, Oklahoma. It was built in 2013, so it is 12 years old, younger 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 960 vehicles a day, roughly 10% of them trucks, projected to reach 1,536 by 2042. The structure is 108 ft (32.8 m) long and 34 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

CarriesIRR N3925 (osage)
CrossesFlat Rock Creek
Location.5N of 36th Street N.
RouteCounty Highway N3925
Coordinates36.21417, -96.01139
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating77.9 US tons
Inventory rating32.4 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length108 ft (32.8 m)
Longest span105 ft (32 m)
Deck width34 ft (10.4 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic960 (2022)
Projected traffic1,536 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was IRR N3925 (osage) over Flat Rock Creek built?

It was built in 2013, making it 12 years old in 2025.

What condition is IRR N3925 (osage) over Flat Rock Creek 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 February 2024.

How much traffic does IRR N3925 (osage) over Flat Rock Creek carry?

About 960 vehicles per day (2022 count), of which roughly 10% are trucks.

How long is IRR N3925 (osage) over Flat Rock Creek?

The structure is 108 ft (32.8 m) long with a longest span of 105 ft (32 m) and a deck 34 ft wide.

Who owns IRR N3925 (osage) over Flat Rock Creek?

It is owned by the County Highway Agency.