US Bridges

1128C/ N4520 over Fourteen Mile Creek

Good

Cherokee County, Oklahoma · 3.3 MI E of SH 82 · Structure no. 216120000000000

Built
1987
38 years old
Condition
Good
inspected August 2023
Type
Tee Beam
Prestressed Concrete
Length
105 ft
3 main spans
Daily traffic
1,862
2022 count
Owner
County
County Highway Agency

About this bridge

1128C/ N4520 over Fourteen Mile Creek is a prestressed concrete tee beam carrying 1128C/ N4520 over Fourteen Mile Creek in Cherokee County, Oklahoma. It was built in 1987, so it is 38 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 1,862 vehicles a day, roughly 15% of them trucks, projected to reach 2,979 by 2042. The structure is 105 ft (32 m) long and 35 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
Carries1128C/ N4520
CrossesFourteen Mile Creek
Location3.3 MI E of SH 82
RouteCounty Highway 1128C
CountyCherokee County
StateOklahoma
Coordinates36.02852, -94.95778
Functional classRural Major Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating63.6 US tons
Inventory rating38.3 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length105 ft (32 m)
Longest span35 ft (10.7 m)
Deck width35 ft (10.7 m)
Roadway width33 ft (10.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,862 (2022)
Projected traffic2,979 by 2042
Trucks15%
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$521,000
NavigationNo navigation control on waterway

Frequently asked questions

When was 1128C/ N4520 over Fourteen Mile Creek built?

It was built in 1987, making it 38 years old in 2025.

What condition is 1128C/ N4520 over Fourteen Mile 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 August 2023.

How much traffic does 1128C/ N4520 over Fourteen Mile Creek carry?

About 1,862 vehicles per day (2022 count), of which roughly 15% are trucks.

How long is 1128C/ N4520 over Fourteen Mile Creek?

The structure is 105 ft (32 m) long with a longest span of 35 ft (10.7 m) and a deck 35 ft wide.

Who owns 1128C/ N4520 over Fourteen Mile Creek?

It is owned by the County Highway Agency.