US Bridges

SR 166 over Millstone Creek

Good

Perry County, Indiana · 01.94 E SR 66 · Structure no. 028551

Built
2012
13 years old
Condition
Good
inspected February 2023
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete Continuous
Length
225 ft
3 main spans
Daily traffic
734
2004 count
Owner
State
State Highway Agency

About this bridge

SR 166 over Millstone Creek is a prestressed concrete continuous box beam or girders - single or spread carrying SR 166 over Millstone Creek in Perry County, Indiana. It was built in 2012, so it is 13 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 734 vehicles a day, roughly 9% of them trucks, projected to reach 914 by 2029. The structure is 225 ft (68.5 m) long and 36 ft wide. If it were closed, the detour would be 12.4 mi (20 km).

Location

Open in Google Maps
CarriesSR 166
CrossesMillstone Creek
Location01.94 E SR 66
RouteState Highway 166
CountyPerry County
StateIndiana
Coordinates37.90372, -86.6413
Functional classRural Minor Collector

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.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46.4 US tons
Inventory rating35.7 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length225 ft (68.5 m)
Longest span81 ft (24.6 m)
Deck width36 ft (10.9 m)
Roadway width32 ft (9.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic734 (2004)
Projected traffic914 by 2029
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed12.4 mi (20 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—
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was SR 166 over Millstone Creek built?

It was built in 2012, making it 13 years old in 2025.

What condition is SR 166 over Millstone Creek 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 February 2023.

How much traffic does SR 166 over Millstone Creek carry?

About 734 vehicles per day (2004 count), of which roughly 9% are trucks.

How long is SR 166 over Millstone Creek?

The structure is 225 ft (68.5 m) long with a longest span of 81 ft (24.6 m) and a deck 36 ft wide.

Who owns SR 166 over Millstone Creek?

It is owned by the State Highway Agency.