US Bridges

Monon Road over Singleton Ditch

Fair

Lake County, Indiana · 01.00 N. of 221st Ave · Structure no. 4500055

Built
1988
37 years old
Condition
Fair
inspected August 2024
Type
Slab
Concrete Continuous
Length
84 ft
3 main spans
Daily traffic
940
2012 count
Owner
County
County Highway Agency

About this bridge

Monon Road over Singleton Ditch is a concrete continuous slab carrying Monon Road over Singleton Ditch in Lake County, Indiana. It was built in 1988, so it is 37 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 940 vehicles a day, roughly 1% of them trucks, projected to reach 1,243 by 2040. The structure is 84 ft (25.7 m) long and 29 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesMonon Road
CrossesSingleton Ditch
Location01.00 N. of 221st Ave
RouteCounty Highway 0
CountyLake County
StateIndiana
Coordinates41.2341, -87.37968
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 inspectionAugust 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 adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60.1 US tons
Inventory rating35.9 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length84 ft (25.7 m)
Longest span32 ft (9.9 m)
Deck width29 ft (8.8 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic940 (2012)
Projected traffic1,243 by 2040
Trucks1%
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

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$392,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Monon Road over Singleton Ditch built?

It was built in 1988, making it 37 years old in 2025.

What condition is Monon Road over Singleton 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 August 2024.

How much traffic does Monon Road over Singleton Ditch carry?

About 940 vehicles per day (2012 count), of which roughly 1% are trucks.

How long is Monon Road over Singleton Ditch?

The structure is 84 ft (25.7 m) long with a longest span of 32 ft (9.9 m) and a deck 29 ft wide.

Who owns Monon Road over Singleton Ditch?

It is owned by the County Highway Agency.