US Bridges

N1670 over Buck Creek

Good

Harmon County, Oklahoma · 3.6 W & 6.5 S of Hollis · Structure no. 263190000000000

Built
2000
25 years old
Condition
Good
inspected February 2024
Type
Culvert
Steel
Length
32 ft
4 main spans
Daily traffic
24
2022 count
Owner
County
County Highway Agency

About this bridge

N1670 over Buck Creek is a steel culvert carrying N1670 over Buck Creek in Harmon County, Oklahoma. It was built in 2000, so it is 25 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 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 24 vehicles a day, roughly 15% of them trucks, projected to reach 38 by 2042. The structure is 32 ft (9.8 m) long and 40 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

CarriesN1670
CrossesBuck Creek
Location3.6 W & 6.5 S of Hollis
RouteCounty Highway N1670
Coordinates34.58694, -99.98139
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
Channel and channel protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36 US tons
Inventory rating21.1 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans4
Design loadUnknown
Structure length32 ft (9.8 m)
Longest span4 ft (1.2 m)
Deck width40 ft (12.2 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic24 (2022)
Projected traffic38 by 2042
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$225,000
NavigationNo navigation control on waterway

Frequently asked questions

When was N1670 over Buck Creek built?

It was built in 2000, making it 25 years old in 2025.

What condition is N1670 over Buck 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 N1670 over Buck Creek carry?

About 24 vehicles per day (2022 count), of which roughly 15% are trucks.

How long is N1670 over Buck Creek?

The structure is 32 ft (9.8 m) long with a longest span of 4 ft (1.2 m) and a deck 40 ft wide.

Who owns N1670 over Buck Creek?

It is owned by the County Highway Agency.