US Bridges

N2490 over Ninemile Creek

PoorPosted for load

Blaine County, Oklahoma · 6S 1E of Canton · Structure no. 148820000000000

Built
1960
65 years old, rebuilt 1997
Condition
Poor
inspected May 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
49 ft
1 main span
Daily traffic
30
2022 count
Owner
County
County Highway Agency

About this bridge

N2490 over Ninemile Creek is a steel stringer/multi-beam or girder carrying N2490 over Ninemile Creek in Blaine County, Oklahoma. It was built in 1960 and reconstructed in 1997, so it is 65 years old, older 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 30 vehicles a day, roughly 10% of them trucks, projected to reach 48 by 2042. The structure is 49 ft (14.9 m) long and 19 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesN2490
CrossesNinemile Creek
Location6S 1E of Canton
RouteCounty Highway N2490
Coordinates35.97139, -98.56556
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2023
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 adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating10 US tons
Inventory rating5 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length49 ft (14.9 m)
Longest span48 ft (14.6 m)
Deck width19 ft (5.8 m)
Roadway width19 ft (5.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic30 (2022)
Projected traffic48 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$346,000
NavigationNo navigation control on waterway

Frequently asked questions

When was N2490 over Ninemile Creek built?

It was built in 1960, making it 65 years old in 2025. It was reconstructed in 1997.

What condition is N2490 over Ninemile Creek 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 May 2023.

How much traffic does N2490 over Ninemile Creek carry?

About 30 vehicles per day (2022 count), of which roughly 10% are trucks.

How long is N2490 over Ninemile Creek?

The structure is 49 ft (14.9 m) long with a longest span of 48 ft (14.6 m) and a deck 19 ft wide.

Who owns N2490 over Ninemile Creek?

It is owned by the County Highway Agency.