US Bridges

N3070 over Dry Creek

Fair

Grant County, Oklahoma · .3N .9W 2.6NOF Deer Creek · Structure no. 251930000000000

Built
1997
28 years old
Condition
Fair
inspected May 2023
Type
Other
Steel
Length
34 ft
1 main span
Daily traffic
24
2022 count
Owner
County
County Highway Agency

About this bridge

N3070 over Dry Creek is a steel other carrying N3070 over Dry Creek in Grant County, Oklahoma. It was built in 1997, so it is 28 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 15% of them trucks, projected to reach 38 by 2042. The structure is 34 ft (10.4 m) long and 26 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesN3070
CrossesDry Creek
Location.3N .9W 2.6NOF Deer Creek
RouteCounty Highway N3070
CountyGrant County
StateOklahoma
Coordinates36.84779, -97.53458
Functional classRural Major Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating77.1 US tons
Inventory rating46 US tons

Structure

Structure typeOther
MaterialSteel
DeckSteel plate
Main spans1
Design loadHS 20
Structure length34 ft (10.4 m)
Longest span33 ft (10.1 m)
Deck width26 ft (7.8 m)
Roadway width25 ft (7.6 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
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$285,000
NavigationNo navigation control on waterway

Frequently asked questions

When was N3070 over Dry Creek built?

It was built in 1997, making it 28 years old in 2025.

What condition is N3070 over Dry 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 2023.

How much traffic does N3070 over Dry Creek carry?

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

How long is N3070 over Dry Creek?

The structure is 34 ft (10.4 m) long with a longest span of 33 ft (10.1 m) and a deck 26 ft wide.

Who owns N3070 over Dry Creek?

It is owned by the County Highway Agency.