US Bridges

Leonard Huff -137 over Sulphur CR

FairPosted for load

Iron County, Missouri · S 8 T 31 N R 4 E · Structure no. 16925

Built
1972
53 years old
Condition
Fair
inspected February 2025
Type
Stringer/Multi-beam or Girder
Steel
Length
23 ft
1 main span
Daily traffic
15
2023 count
Owner
County
County Highway Agency

About this bridge

Leonard Huff -137 over Sulphur CR is a steel stringer/multi-beam or girder carrying Leonard Huff -137 over Sulphur CR in Iron County, Missouri. It was built in 1972, so it is 53 years old, older 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 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 15 vehicles a day, roughly 10% of them trucks, projected to reach 18 by 2043. The structure is 23 ft (7 m) long and 16 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesLeonard Huff -137
CrossesSulphur CR
LocationS 8 T 31 N R 4 E
RouteCounty Highway 137
CountyIron County
StateMissouri
Coordinates37.3921, -90.6262
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2025
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Deck geometry6: Equal to present minimum criteria
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating11.9 US tons
Inventory rating6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadOther
Structure length23 ft (7 m)
Longest span21 ft (6.4 m)
Deck width16 ft (4.8 m)
Roadway width15 ft (4.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15 (2023)
Projected traffic18 by 2043
Trucks10%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 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$239,000 (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Leonard Huff -137 over Sulphur CR built?

It was built in 1972, making it 53 years old in 2025.

What condition is Leonard Huff -137 over Sulphur CR 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 February 2025.

How much traffic does Leonard Huff -137 over Sulphur CR carry?

About 15 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is Leonard Huff -137 over Sulphur CR?

The structure is 23 ft (7 m) long with a longest span of 21 ft (6.4 m) and a deck 16 ft wide.

Who owns Leonard Huff -137 over Sulphur CR?

It is owned by the County Highway Agency.