US Bridges

CR 600E over Mounts Run

Fair

Boone County, Indiana · 00.60 N of CR 100 N · Structure no. 0600051

Built
1935
90 years old, rebuilt 1975
Condition
Fair
inspected September 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
35 ft
1 main span
Daily traffic
260
2017 count
Owner
County
County Highway Agency

About this bridge

CR 600E over Mounts Run is a prestressed concrete box beam or girders - multiple carrying CR 600E over Mounts Run in Boone County, Indiana. It was built in 1935 and reconstructed in 1975, so it is 90 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 260 vehicles a day, roughly 3% of them trucks, projected to reach 400 by 2037. The structure is 35 ft (10.6 m) long and 24 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesCR 600E
CrossesMounts Run
Location00.60 N of CR 100 N
RouteCounty Highway 600
CountyBoone County
StateIndiana
Coordinates40.06318, -86.356
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.
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 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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating76.4 US tons
Inventory rating45.7 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadUnknown
Structure length35 ft (10.6 m)
Longest span21 ft (6.5 m)
Deck width24 ft (7.3 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic260 (2017)
Projected traffic400 by 2037
Trucks3%
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 CR 600E over Mounts Run built?

It was built in 1935, making it 90 years old in 2025. It was reconstructed in 1975.

What condition is CR 600E 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 September 2023.

How much traffic does CR 600E over Mounts Run carry?

About 260 vehicles per day (2017 count), of which roughly 3% are trucks.

How long is CR 600E over Mounts Run?

The structure is 35 ft (10.6 m) long with a longest span of 21 ft (6.5 m) and a deck 24 ft wide.

Who owns CR 600E over Mounts Run?

It is owned by the County Highway Agency.