US Bridges

N1810 over Redoubt Creek

Fair

Harper County, Oklahoma · 8N 10W .1S of Buffalo · Structure no. 323450000000000

Built
2022
3 years old
Condition
Fair
inspected May 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
90 ft
2 main spans
Daily traffic
24
2022 count
Owner
County
County Highway Agency

About this bridge

N1810 over Redoubt Creek is a steel stringer/multi-beam or girder carrying N1810 over Redoubt Creek in Harper County, Oklahoma. It was built in 2022, so it is 3 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.

It carries about 24 vehicles a day, roughly 10% of them trucks, projected to reach 38 by 2042. The structure is 90 ft (27.4 m) long and 29 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesN1810
CrossesRedoubt Creek
Location8N 10W .1S of Buffalo
RouteCounty Highway N1810
CountyHarper County
StateOklahoma
Coordinates36.97222, -99.81083
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
Deck8 Very GoodNo problems noted.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure8 Very GoodNo problems noted.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating88 US tons
Inventory rating53 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckNot applicable
Main spans2
Design loadH 20
Structure length90 ft (27.4 m)
Longest span45 ft (13.7 m)
Deck width29 ft (8.7 m)
Roadway width25 ft (7.5 m)
Vertical clearance over deck0 ft (0 m)

Traffic and service

Average daily traffic24 (2022)
Projected traffic38 by 2042
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was N1810 over Redoubt Creek built?

It was built in 2022, making it 3 years old in 2025.

What condition is N1810 over Redoubt 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 May 2024.

How much traffic does N1810 over Redoubt Creek carry?

About 24 vehicles per day (2022 count), of which roughly 10% are trucks.

How long is N1810 over Redoubt Creek?

The structure is 90 ft (27.4 m) long with a longest span of 45 ft (13.7 m) and a deck 29 ft wide.

Who owns N1810 over Redoubt Creek?

It is owned by the County Highway Agency.