US Bridges

Iron Post Rd. over Snake Creek Trib.

PoorPosted for load

Cherokee County, Oklahoma · Mayes Cl 1.2 E. of NW Cor · Structure no. 239220000000000

Built
1994
31 years old
Condition
Poor
inspected August 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
40 ft
2 main spans
Daily traffic
133
2022 count
Owner
County
County Highway Agency

About this bridge

Iron Post Rd. over Snake Creek Trib. is a steel continuous stringer/multi-beam or girder carrying Iron Post Rd. over Snake Creek Trib. in Cherokee County, Oklahoma. It was built in 1994, so it is 31 years old, younger 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: posted for load restriction.

It carries about 133 vehicles a day, roughly 15% of them trucks, projected to reach 213 by 2042. The structure is 40 ft (12.3 m) long and 24 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

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CarriesIron Post Rd.
CrossesSnake Creek Trib.
LocationMayes Cl 1.2 E. of NW Cor
RouteCounty Highway 1117
CountyCherokee County
StateOklahoma
Coordinates36.16153, -95.0984
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating30 US tons
Inventory rating18 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadH 20
Structure length40 ft (12.3 m)
Longest span19 ft (5.8 m)
Deck width24 ft (7.3 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic133 (2022)
Projected traffic213 by 2042
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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$303,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Iron Post Rd. over Snake Creek Trib. built?

It was built in 1994, making it 31 years old in 2025.

What condition is Iron Post Rd. over Snake Creek Trib. 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 August 2023.

How much traffic does Iron Post Rd. over Snake Creek Trib. carry?

About 133 vehicles per day (2022 count), of which roughly 15% are trucks.

How long is Iron Post Rd. over Snake Creek Trib.?

The structure is 40 ft (12.3 m) long with a longest span of 19 ft (5.8 m) and a deck 24 ft wide.

Who owns Iron Post Rd. over Snake Creek Trib.?

It is owned by the County Highway Agency.