US Bridges

IRR N4640 over Trib to Spring River

PoorPosted for load

Ottawa County, Oklahoma · 1.5N 3.5E of Quapaw · Structure no. 303250000000000

Built
2009
16 years old
Condition
Poor
inspected September 2023
Type
Culvert
Steel
Length
23 ft
2 main spans
Daily traffic
100
2022 count
Owner
County
County Highway Agency

About this bridge

IRR N4640 over Trib to Spring River is a steel culvert carrying IRR N4640 over Trib to Spring River in Ottawa County, Oklahoma. It was built in 2009, so it is 16 years old, younger than the Oklahoma average of 47.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. 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 23 ft (6.9 m) long and 46 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesIRR N4640
CrossesTrib to Spring River
Location1.5N 3.5E of Quapaw
RouteCounty Highway N4640
CountyOttawa County
StateOklahoma
Coordinates36.97652, -94.7227
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Culvert4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating7.7 US tons
Inventory rating4.6 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans2
Design loadUnknown
Structure length23 ft (6.9 m)
Longest span9 ft (2.7 m)
Deck width46 ft (14 m)
Roadway width25 ft (7.5 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 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$225,000
NavigationNo navigation control on waterway

Frequently asked questions

When was IRR N4640 over Trib to Spring River built?

It was built in 2009, making it 16 years old in 2025.

What condition is IRR N4640 over Trib to Spring River in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in September 2023.

How much traffic does IRR N4640 over Trib to Spring River carry?

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

How long is IRR N4640 over Trib to Spring River?

The structure is 23 ft (6.9 m) long with a longest span of 9 ft (2.7 m) and a deck 46 ft wide.

Who owns IRR N4640 over Trib to Spring River?

It is owned by the County Highway Agency.