US Bridges

SR 32 over Mounts Run

Fair

Boone County, Indiana · 02.26 W US 421 · Structure no. 010600

Built
1932
93 years old, rebuilt 1983
Condition
Fair
inspected February 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
55 ft
1 main span
Daily traffic
5,931
2021 count
Owner
State
State Highway Agency

About this bridge

SR 32 over Mounts Run is a steel stringer/multi-beam or girder carrying SR 32 over Mounts Run in Boone County, Indiana. It was built in 1932 and reconstructed in 1983, so it is 93 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 5,931 vehicles a day, roughly 11% of them trucks, projected to reach 7,645 by 2030. The structure is 55 ft (16.7 m) long and 46 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesSR 32
CrossesMounts Run
Location02.26 W US 421
RouteState Highway 32
CountyBoone County
StateIndiana
Coordinates40.04028, -86.32787
Functional classRural Minor Arterial

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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating61.1 US tons
Inventory rating47.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length55 ft (16.7 m)
Longest span51 ft (15.6 m)
Deck width46 ft (14.1 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,931 (2021)
Projected traffic7,645 by 2030
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 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 32 over Mounts Run built?

It was built in 1932, making it 93 years old in 2025. It was reconstructed in 1983.

What condition is SR 32 over Mounts 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 February 2024.

How much traffic does SR 32 over Mounts Run carry?

About 5,931 vehicles per day (2021 count), of which roughly 11% are trucks.

How long is SR 32 over Mounts Run?

The structure is 55 ft (16.7 m) long with a longest span of 51 ft (15.6 m) and a deck 46 ft wide.

Who owns SR 32 over Mounts Run?

It is owned by the State Highway Agency.