US Bridges

CR 575S over Sly Fork

Fair

Madison County, Indiana · 00.80 E CR 300 E · Structure no. 4800144

Built
1927
98 years old, rebuilt 1983
Condition
Fair
inspected October 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
31 ft
1 main span
Daily traffic
319
2023 count
Owner
County
County Highway Agency

About this bridge

CR 575S over Sly Fork is a prestressed concrete box beam or girders - multiple carrying CR 575S over Sly Fork in Madison County, Indiana. It was built in 1927 and reconstructed in 1983, so it is 98 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 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 319 vehicles a day, roughly 3% of them trucks, projected to reach 452 by 2043. The structure is 31 ft (9.4 m) long and 22 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
CarriesCR 575S
CrossesSly Fork
Location00.80 E CR 300 E
RouteCounty Highway 146
CountyMadison County
StateIndiana
Coordinates40.02268, -85.59811
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60.1 US tons
Inventory rating35.9 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadUnknown
Structure length31 ft (9.4 m)
Longest span28 ft (8.6 m)
Deck width22 ft (6.7 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic319 (2023)
Projected traffic452 by 2043
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 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 CR 575S over Sly Fork built?

It was built in 1927, making it 98 years old in 2025. It was reconstructed in 1983.

What condition is CR 575S over Sly Fork 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 October 2024.

How much traffic does CR 575S over Sly Fork carry?

About 319 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is CR 575S over Sly Fork?

The structure is 31 ft (9.4 m) long with a longest span of 28 ft (8.6 m) and a deck 22 ft wide.

Who owns CR 575S over Sly Fork?

It is owned by the County Highway Agency.