US Bridges

SR 75 over Wolf Creek

Fair

Boone County, Indiana · 01.91 S SR 47 · Structure no. 024910

Built
1936
89 years old, rebuilt 1982
Condition
Fair
inspected December 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
89 ft
3 main spans
Daily traffic
1,587
2021 count
Owner
State
State Highway Agency

About this bridge

SR 75 over Wolf Creek is a steel continuous stringer/multi-beam or girder carrying SR 75 over Wolf Creek in Boone County, Indiana. It was built in 1936 and reconstructed in 1982, so it is 89 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 1,587 vehicles a day, roughly 12% of them trucks, projected to reach 2,568 by 2034. The structure is 89 ft (27.1 m) long and 44 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesSR 75
CrossesWolf Creek
Location01.91 S SR 47
RouteState Highway 75
CountyBoone County
StateIndiana
Coordinates40.10578, -86.61941
Functional classRural Major 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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating52.1 US tons
Inventory rating40 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length89 ft (27.1 m)
Longest span36 ft (11 m)
Deck width44 ft (13.5 m)
Roadway width42 ft (12.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,587 (2021)
Projected traffic2,568 by 2034
Trucks12%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 SR 75 over Wolf Creek built?

It was built in 1936, making it 89 years old in 2025. It was reconstructed in 1982.

What condition is SR 75 over Wolf 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 December 2023.

How much traffic does SR 75 over Wolf Creek carry?

About 1,587 vehicles per day (2021 count), of which roughly 12% are trucks.

How long is SR 75 over Wolf Creek?

The structure is 89 ft (27.1 m) long with a longest span of 36 ft (11 m) and a deck 44 ft wide.

Who owns SR 75 over Wolf Creek?

It is owned by the State Highway Agency.