US Bridges

Decker Road over Muddy Run

Fair

Knox County, Indiana · 00.24 N of Bloebaum Road · Structure no. 4200078

Built
1950
75 years old
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
41 ft
1 main span
Daily traffic
130
2016 count
Owner
County
County Highway Agency

About this bridge

Decker Road over Muddy Run is a steel stringer/multi-beam or girder carrying Decker Road over Muddy Run in Knox County, Indiana. It was built in 1950, so it is 75 years old, older than the Indiana average of 46.6 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.

It carries about 130 vehicles a day, roughly 2% of them trucks, projected to reach 170 by 2036. The structure is 41 ft (12.4 m) long and 18 ft wide. If it were closed, the detour would be 2.5 mi (4 km).

Location

Open in Google Maps
CarriesDecker Road
CrossesMuddy Run
Location00.24 N of Bloebaum Road
RouteCounty Highway 0
CountyKnox County
StateIndiana
Coordinates38.55706, -87.50566
Functional classRural Minor 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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating52.4 US tons
Inventory rating31.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length41 ft (12.4 m)
Longest span38 ft (11.5 m)
Deck width18 ft (5.4 m)
Roadway width17 ft (5.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic130 (2016)
Projected traffic170 by 2036
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed2.5 mi (4 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 Decker Road over Muddy Run built?

It was built in 1950, making it 75 years old in 2025.

What condition is Decker Road over Muddy Run 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 September 2023.

How much traffic does Decker Road over Muddy Run carry?

About 130 vehicles per day (2016 count), of which roughly 2% are trucks.

How long is Decker Road over Muddy Run?

The structure is 41 ft (12.4 m) long with a longest span of 38 ft (11.5 m) and a deck 18 ft wide.

Who owns Decker Road over Muddy Run?

It is owned by the County Highway Agency.