US Bridges

SR 15 over Back Creek

Good

Grant County, Indiana · 00.05 N SR 22 · Structure no. 003890

Built
1938
87 years old, rebuilt 1964
Condition
Good
inspected June 2023
Type
Culvert
Concrete
Length
73 ft
1 main span
Daily traffic
8,754
2020 count
Owner
State
State Highway Agency

About this bridge

SR 15 over Back Creek is a concrete culvert carrying SR 15 over Back Creek in Grant County, Indiana. It was built in 1938 and reconstructed in 1964, so it is 87 years old, older 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 8,754 vehicles a day, roughly 2% of them trucks, projected to reach 16,538 by 2031. The structure is 73 ft (22.4 m) long and 95 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesSR 15
CrossesBack Creek
Location00.05 N SR 22
RouteState Highway 15
CountyGrant County
StateIndiana
Coordinates40.4896, -85.62807
Functional classUrban Other Principal Arterial

Condition and inspection

Good

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

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert7 GoodSome minor problems.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating72.9 US tons
Inventory rating66 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans1
Design loadH 20
Structure length73 ft (22.4 m)
Longest span50 ft (15.2 m)
Deck width95 ft (29.1 m)
Roadway width80 ft (24.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,754 (2020)
Projected traffic16,538 by 2031
Trucks2%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed0.6 mi (1 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 15 over Back Creek built?

It was built in 1938, making it 87 years old in 2025. It was reconstructed in 1964.

What condition is SR 15 over Back 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 June 2023.

How much traffic does SR 15 over Back Creek carry?

About 8,754 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is SR 15 over Back Creek?

The structure is 73 ft (22.4 m) long with a longest span of 50 ft (15.2 m) and a deck 95 ft wide.

Who owns SR 15 over Back Creek?

It is owned by the State Highway Agency.