US Bridges

3510C over Mill Creek

Fair

Johnston County, Oklahoma · .7 S & 3.5 W of Ravia · Structure no. 220660000000000

Built
1988
37 years old
Condition
Fair
inspected June 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
222 ft
3 main spans
Daily traffic
125
2022 count
Owner
County
County Highway Agency

About this bridge

3510C over Mill Creek is a prestressed concrete stringer/multi-beam or girder carrying 3510C over Mill Creek in Johnston County, Oklahoma. It was built in 1988, so it is 37 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 125 vehicles a day, roughly 15% of them trucks, projected to reach 200 by 2042. The structure is 222 ft (67.8 m) long and 29 ft wide. If it were closed, the detour would be 14.9 mi (24 km).

Location

Open in Google Maps
Carries3510C
CrossesMill Creek
Location.7 S & 3.5 W of Ravia
RouteCounty Highway 3510C
CountyJohnston County
StateOklahoma
Coordinates34.23064, -96.81369
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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJune 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 adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating110.1 US tons
Inventory rating47 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length222 ft (67.8 m)
Longest span100 ft (30.5 m)
Deck width29 ft (8.7 m)
Roadway width27 ft (8.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic125 (2022)
Projected traffic200 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$757,000
NavigationNo navigation control on waterway

Frequently asked questions

When was 3510C over Mill Creek built?

It was built in 1988, making it 37 years old in 2025.

What condition is 3510C 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 June 2023.

How much traffic does 3510C over Mill Creek carry?

About 125 vehicles per day (2022 count), of which roughly 15% are trucks.

How long is 3510C over Mill Creek?

The structure is 222 ft (67.8 m) long with a longest span of 100 ft (30.5 m) and a deck 29 ft wide.

Who owns 3510C over Mill Creek?

It is owned by the County Highway Agency.