US Bridges

3502C over Mill Creek

FairPosted for load

Johnston County, Oklahoma · 2 W of Mill Creek · Structure no. 109440000000000

Built
1948
77 years old
Condition
Fair
inspected May 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
185 ft
5 main spans
Daily traffic
410
2022 count
Owner
County
County Highway Agency

About this bridge

3502C over Mill Creek is a steel stringer/multi-beam or girder carrying 3502C over Mill Creek in Johnston County, Oklahoma. It was built in 1948, so it is 77 years old, older 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 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.

It carries about 410 vehicles a day, roughly 15% of them trucks, projected to reach 656 by 2042. The structure is 185 ft (56.4 m) long and 23 ft wide. If it were closed, the detour would be 14.9 mi (24 km).

Location

Open in Google Maps
Carries3502C
CrossesMill Creek
Location2 W of Mill Creek
RouteCounty Highway 3502C
CountyJohnston County
StateOklahoma
Coordinates34.40484, -96.86362
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating30 US tons
Inventory rating18 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length185 ft (56.4 m)
Longest span37 ft (11.3 m)
Deck width23 ft (7 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic410 (2022)
Projected traffic656 by 2042
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.9 mi (24 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$688,000
NavigationNo navigation control on waterway

Frequently asked questions

When was 3502C over Mill Creek built?

It was built in 1948, making it 77 years old in 2025.

What condition is 3502C over Mill 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 3502C over Mill Creek carry?

About 410 vehicles per day (2022 count), of which roughly 15% are trucks.

How long is 3502C over Mill Creek?

The structure is 185 ft (56.4 m) long with a longest span of 37 ft (11.3 m) and a deck 23 ft wide.

Who owns 3502C over Mill Creek?

It is owned by the County Highway Agency.