US Bridges

N Iron Mountain RD over Panther Creek

Fair

Webster County, Missouri · S 23 T 29 N R 19 W · Structure no. 30947

Built
2002
23 years old
Condition
Fair
inspected April 2023
Type
Slab
Concrete Continuous
Length
51 ft
3 main spans
Daily traffic
75
2023 count
Owner
County
County Highway Agency

About this bridge

N Iron Mountain RD over Panther Creek is a concrete continuous slab carrying N Iron Mountain RD over Panther Creek in Webster County, Missouri. It was built in 2002, so it is 23 years old, younger than the Missouri average of 45.1 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 75 vehicles a day, roughly 10% of them trucks, projected to reach 124 by 2043. The structure is 51 ft (15.5 m) long and 26 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesN Iron Mountain RD
CrossesPanther Creek
LocationS 23 T 29 N R 19 W
RouteCounty Highway 324
Coordinates37.19626, -92.97589
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating49.6 US tons
Inventory rating29.8 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length51 ft (15.5 m)
Longest span16 ft (4.9 m)
Deck width26 ft (7.9 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic75 (2023)
Projected traffic124 by 2043
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was N Iron Mountain RD over Panther Creek built?

It was built in 2002, making it 23 years old in 2025.

What condition is N Iron Mountain RD over Panther 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 April 2023.

How much traffic does N Iron Mountain RD over Panther Creek carry?

About 75 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is N Iron Mountain RD over Panther Creek?

The structure is 51 ft (15.5 m) long with a longest span of 16 ft (4.9 m) and a deck 26 ft wide.

Who owns N Iron Mountain RD over Panther Creek?

It is owned by the County Highway Agency.