US Bridges

Allisonville RD over Overdorff Branch

Fair

Hamilton County, Indiana · 00.74 N of 146th ST · Structure no. 2900208

Built
1937
88 years old
Condition
Fair
inspected September 2023
Type
Culvert
Concrete
Length
23 ft
1 main span
Daily traffic
20,020
2024 count
Owner
County
County Highway Agency

About this bridge

Allisonville RD over Overdorff Branch is a concrete culvert carrying Allisonville RD over Overdorff Branch in Hamilton County, Indiana. It was built in 1937, so it is 88 years old, older 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 20,020 vehicles a day, roughly 7% of them trucks, projected to reach 36,040 by 2044. The structure is 23 ft (7 m) long and 46 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesAllisonville RD
CrossesOverdorff Branch
Location00.74 N of 146th ST
RouteCity Street 0
CountyHamilton County
StateIndiana
Coordinates40.01088, -86.01619
Functional classUrban Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2023
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 rating46.6 US tons
Inventory rating35.9 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans1
Design loadUnknown
Structure length23 ft (7 m)
Longest span20 ft (6.1 m)
Deck width46 ft (14 m)
Roadway width42 ft (12.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20,020 (2024)
Projected traffic36,040 by 2044
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 Allisonville RD over Overdorff Branch built?

It was built in 1937, making it 88 years old in 2025.

What condition is Allisonville RD over Overdorff Branch 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 September 2023.

How much traffic does Allisonville RD over Overdorff Branch carry?

About 20,020 vehicles per day (2024 count), of which roughly 7% are trucks.

How long is Allisonville RD over Overdorff Branch?

The structure is 23 ft (7 m) long with a longest span of 20 ft (6.1 m) and a deck 46 ft wide.

Who owns Allisonville RD over Overdorff Branch?

It is owned by the County Highway Agency.