US Bridges

SR 1 over Nettlehorst Ditch

Fair

Allen County, Indiana · 05.85 E I-69 · Structure no. 051400

Built
2016
9 years old
Condition
Fair
inspected December 2024
Type
Slab
Concrete
Length
30 ft
1 main span
Daily traffic
7,655
2021 count
Owner
State
State Highway Agency

About this bridge

SR 1 over Nettlehorst Ditch is a concrete slab carrying SR 1 over Nettlehorst Ditch in Allen County, Indiana. It was built in 2016, so it is 9 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 7,655 vehicles a day, roughly 5% of them trucks, projected to reach 14,525 by 2035. The structure is 30 ft (9.2 m) long and 35 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesSR 1
CrossesNettlehorst Ditch
Location05.85 E I-69
RouteState Highway 1
CountyAllen County
StateIndiana
Coordinates41.21657, -85.01564
Functional classRural Minor Arterial

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating53.6 US tons
Inventory rating41.1 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length30 ft (9.2 m)
Longest span28 ft (8.5 m)
Deck width35 ft (10.6 m)
Roadway width32 ft (9.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,655 (2021)
Projected traffic14,525 by 2035
Trucks5%
Lanes on structure2
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 1 over Nettlehorst Ditch built?

It was built in 2016, making it 9 years old in 2025.

What condition is SR 1 over Nettlehorst Ditch 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 December 2024.

How much traffic does SR 1 over Nettlehorst Ditch carry?

About 7,655 vehicles per day (2021 count), of which roughly 5% are trucks.

How long is SR 1 over Nettlehorst Ditch?

The structure is 30 ft (9.2 m) long with a longest span of 28 ft (8.5 m) and a deck 35 ft wide.

Who owns SR 1 over Nettlehorst Ditch?

It is owned by the State Highway Agency.