US Bridges

CR 300N over Big Blue River

Fair

Henry County, Indiana · 00.20 E of CR 100 E · Structure no. 3300037

Built
1970
55 years old
Condition
Fair
inspected August 2023
Type
Slab
Concrete Continuous
Length
112 ft
3 main spans
Daily traffic
393
2021 count
Owner
County
County Highway Agency

About this bridge

CR 300N over Big Blue River is a concrete continuous slab carrying CR 300N over Big Blue River in Henry County, Indiana. It was built in 1970, so it is 55 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 393 vehicles a day, roughly 8% of them trucks, projected to reach 629 by 2041. The structure is 112 ft (34.1 m) long and 26 ft wide. If it were closed, the detour would be 2.5 mi (4 km).

Location

Open in Google Maps
CarriesCR 300N
CrossesBig Blue River
Location00.20 E of CR 100 E
RouteCounty Highway 172
CountyHenry County
StateIndiana
Coordinates39.97545, -85.36118
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 inspectionAugust 2023
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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating35.9 US tons
Inventory rating35.9 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadUnknown
Structure length112 ft (34.1 m)
Longest span44 ft (13.4 m)
Deck width26 ft (7.9 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic393 (2021)
Projected traffic629 by 2041
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed2.5 mi (4 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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost$175,000 (2023 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was CR 300N over Big Blue River built?

It was built in 1970, making it 55 years old in 2025.

What condition is CR 300N over Big Blue River 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 CR 300N over Big Blue River carry?

About 393 vehicles per day (2021 count), of which roughly 8% are trucks.

How long is CR 300N over Big Blue River?

The structure is 112 ft (34.1 m) long with a longest span of 44 ft (13.4 m) and a deck 26 ft wide.

Who owns CR 300N over Big Blue River?

It is owned by the County Highway Agency.