US Bridges

Risley Road over Mariah Creek

Fair

Knox County, Indiana · 00.40 S of Springtown Roa · Structure no. 4200195

Built
1900
125 years old, rebuilt 1988
Condition
Fair
inspected August 2023
Type
Other
Steel
Length
86 ft
1 main span
Daily traffic
130
2015 count
Owner
County
County Highway Agency

About this bridge

Risley Road over Mariah Creek is a steel other carrying Risley Road over Mariah Creek in Knox County, Indiana. It was built in 1900 and reconstructed in 1988, so it is 125 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 175 by 2037. The structure is 86 ft (26.2 m) long and 18 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesRisley Road
CrossesMariah Creek
Location00.40 S of Springtown Roa
RouteCounty Highway 0
CountyKnox County
StateIndiana
Coordinates38.82275, -87.39165
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 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 statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
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 adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating45 US tons
Inventory rating35.9 US tons

Structure

Structure typeOther
MaterialSteel
DeckSteel plate
Main spans1
Design loadUnknown
Structure length86 ft (26.2 m)
Longest span67 ft (20.5 m)
Deck width18 ft (5.4 m)
Roadway width17 ft (5.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic130 (2015)
Projected traffic175 by 2037
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 Risley Road over Mariah Creek built?

It was built in 1900, making it 125 years old in 2025. It was reconstructed in 1988.

What condition is Risley Road over Mariah 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 August 2023.

How much traffic does Risley Road over Mariah Creek carry?

About 130 vehicles per day (2015 count), of which roughly 2% are trucks.

How long is Risley Road over Mariah Creek?

The structure is 86 ft (26.2 m) long with a longest span of 67 ft (20.5 m) and a deck 18 ft wide.

Who owns Risley Road over Mariah Creek?

It is owned by the County Highway Agency.