US Bridges

N4550 over Otter Creek

FairPosted for load

Haskell County, Oklahoma · .5 S of Keota · Structure no. 223550000000000

Built
1989
36 years old
Condition
Fair
inspected June 2023
Type
Tee Beam
Prestressed Concrete
Length
141 ft
3 main spans
Daily traffic
100
2022 count
Owner
County
County Highway Agency

About this bridge

N4550 over Otter Creek is a prestressed concrete tee beam carrying N4550 over Otter Creek in Haskell County, Oklahoma. It was built in 1989, so it is 36 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 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 141 ft (43 m) long and 34 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesN4550
CrossesOtter Creek
Location.5 S of Keota
RouteCounty Highway N4550
Coordinates35.25085, -94.9203
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry8: Equal to present desirable criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating44 US tons
Inventory rating26.2 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans3
Design loadHL 93
Structure length141 ft (43 m)
Longest span50 ft (15.2 m)
Deck width34 ft (10.4 m)
Roadway width32 ft (9.8 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$648,000
NavigationNo navigation control on waterway

Frequently asked questions

When was N4550 over Otter Creek built?

It was built in 1989, making it 36 years old in 2025.

What condition is N4550 over Otter 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 June 2023.

How much traffic does N4550 over Otter Creek carry?

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

How long is N4550 over Otter Creek?

The structure is 141 ft (43 m) long with a longest span of 50 ft (15.2 m) and a deck 34 ft wide.

Who owns N4550 over Otter Creek?

It is owned by the County Highway Agency.