US Bridges

Marietta Road over Howell Ditch

Good

Shelby County, Indiana · 00.35 S of CR 400 S · Structure no. 7300089

Built
1982
43 years old
Condition
Good
inspected November 2023
Type
Slab
Concrete Continuous
Length
62 ft
3 main spans
Daily traffic
100
2021 count
Owner
County
County Highway Agency

About this bridge

Marietta Road over Howell Ditch is a concrete continuous slab carrying Marietta Road over Howell Ditch in Shelby 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 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 100 vehicles a day, roughly 5% of them trucks, projected to reach 175 by 2041. The structure is 62 ft (18.9 m) long and 26 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesMarietta Road
CrossesHowell Ditch
Location00.35 S of CR 400 S
RouteCounty Highway 0
StateIndiana
Coordinates39.4633, -85.86963
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 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 geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum 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 loadHS 20
Structure length62 ft (18.9 m)
Longest span24 ft (7.4 m)
Deck width26 ft (8 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2021)
Projected traffic175 by 2041
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 Marietta Road over Howell Ditch built?

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

What condition is Marietta Road over Howell Ditch 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 November 2023.

How much traffic does Marietta Road over Howell Ditch carry?

About 100 vehicles per day (2021 count), of which roughly 5% are trucks.

How long is Marietta Road over Howell Ditch?

The structure is 62 ft (18.9 m) long with a longest span of 24 ft (7.4 m) and a deck 26 ft wide.

Who owns Marietta Road over Howell Ditch?

It is owned by the County Highway Agency.