US Bridges

4102C over Big Creek

PoorClosed to traffic

Lincoln County, Oklahoma · 2.1 N 1.5 E of Agra · Structure no. 031110000000000

Built
1930
95 years old
Condition
Poor
inspected February 2024
Type
Girder and Floorbeam System
Steel
Length
80 ft
2 main spans
Daily traffic
100
2022 count
Owner
County
County Highway Agency

About this bridge

4102C over Big Creek is a steel girder and floorbeam system carrying 4102C over Big Creek in Lincoln County, Oklahoma. It was built in 1930, so it is 95 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: closed to all traffic.

It carries about 100 vehicles a day, roughly 15% of them trucks, projected to reach 160 by 2042. The structure is 80 ft (24.4 m) long and 20 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
Carries4102C
CrossesBig Creek
Location2.1 N 1.5 E of Agra
RouteCounty Highway 4102C
CountyLincoln County
StateOklahoma
Coordinates35.92744, -96.84737
Functional classRural Major Collector

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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusClosed to all traffic
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation0: Immediate repair necessary to put back in service
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 rating0 US tons
Inventory rating0 US tons

Structure

Structure typeGirder and Floorbeam System
MaterialSteel
DeckWood or timber
Main spans2
Design loadUnknown
Structure length80 ft (24.4 m)
Longest span60 ft (18.3 m)
Deck width20 ft (6.1 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2022)
Projected traffic160 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$451,000
NavigationNo navigation control on waterway

Frequently asked questions

When was 4102C over Big Creek built?

It was built in 1930, making it 95 years old in 2025.

What condition is 4102C over Big 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 February 2024.

How much traffic does 4102C over Big Creek carry?

About 100 vehicles per day (2022 count), of which roughly 15% are trucks.

How long is 4102C over Big Creek?

The structure is 80 ft (24.4 m) long with a longest span of 60 ft (18.3 m) and a deck 20 ft wide.

Who owns 4102C over Big Creek?

It is owned by the County Highway Agency.