US Bridges

Rothrocks Mill RD over Blue River

Good

Crawford County, Indiana · 1.50 E of Wyandotte Cave · Structure no. 1300031

Built
2006
19 years old
Condition
Good
inspected September 2023
Type
Truss - Thru
Steel
Length
171 ft
1 main span
Daily traffic
137
2015 count
Owner
County
County Highway Agency

About this bridge

Rothrocks Mill RD over Blue River is a steel truss - thru carrying Rothrocks Mill RD over Blue River in Crawford County, Indiana. It was built in 2006, so it is 19 years old, younger than the Indiana average of 46.6 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 137 vehicles a day, roughly 5% of them trucks, projected to reach 163 by 2035. The structure is 171 ft (52.2 m) long and 18 ft wide. If it were closed, the detour would be 14.9 mi (24 km).

CarriesRothrocks Mill RD
CrossesBlue River
Location1.50 E of Wyandotte Cave
RouteCounty Highway 0
StateIndiana
Coordinates38.2745, -86.27572
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating76.3 US tons
Inventory rating45.6 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length171 ft (52.2 m)
Longest span169 ft (51.6 m)
Deck width18 ft (5.4 m)
Roadway width18 ft (5.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic137 (2015)
Projected traffic163 by 2035
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.9 mi (24 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—
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was Rothrocks Mill RD over Blue River built?

It was built in 2006, making it 19 years old in 2025.

What condition is Rothrocks Mill RD over Blue River in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in September 2023.

How much traffic does Rothrocks Mill RD over Blue River carry?

About 137 vehicles per day (2015 count), of which roughly 5% are trucks.

How long is Rothrocks Mill RD over Blue River?

The structure is 171 ft (52.2 m) long with a longest span of 169 ft (51.6 m) and a deck 18 ft wide.

Who owns Rothrocks Mill RD over Blue River?

It is owned by the County Highway Agency.