US Bridges

South Fir Road over Deep Outlet Main

Fair

Marshall County, Indiana · 00.10 S of E 17 B RD · Structure no. 5000115

Built
1982
43 years old
Condition
Fair
inspected October 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
65 ft
1 main span
Daily traffic
175
2024 count
Owner
County
County Highway Agency

About this bridge

South Fir Road over Deep Outlet Main is a prestressed concrete box beam or girders - multiple carrying South Fir Road over Deep Outlet Main in Marshall County, Indiana. It was built in 1982, so it is 43 years old, younger 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 175 vehicles a day, roughly 5% of them trucks, projected to reach 250 by 2042. The structure is 65 ft (19.8 m) long and 24 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesSouth Fir Road
CrossesDeep Outlet Main
Location00.10 S of E 17 B RD
RouteCounty Highway 75
StateIndiana
Coordinates41.22208, -86.15346
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 inspectionOctober 2024
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 adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating83.8 US tons
Inventory rating50.2 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length65 ft (19.8 m)
Longest span56 ft (17.2 m)
Deck width24 ft (7.3 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic175 (2024)
Projected traffic250 by 2042
Trucks5%
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 South Fir Road over Deep Outlet Main built?

It was built in 1982, making it 43 years old in 2025.

What condition is South Fir Road over Deep Outlet Main 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 October 2024.

How much traffic does South Fir Road over Deep Outlet Main carry?

About 175 vehicles per day (2024 count), of which roughly 5% are trucks.

How long is South Fir Road over Deep Outlet Main?

The structure is 65 ft (19.8 m) long with a longest span of 56 ft (17.2 m) and a deck 24 ft wide.

Who owns South Fir Road over Deep Outlet Main?

It is owned by the County Highway Agency.