US Bridges

Lathrop St/Patriot over Graddett Ditch

Good

Henry County, Illinois · E Edge of Annawan · Structure no. 037620000000000

Built
2009
16 years old
Condition
Good
inspected November 2020
Type
Culvert
Concrete
Length
32 ft
2 main spans
Daily traffic
575
2020 count
Owner
City
City or Municipal Highway Agency

About this bridge

Lathrop St/Patriot over Graddett Ditch is a concrete culvert carrying Lathrop St/Patriot over Graddett Ditch in Henry County, Illinois. It was built in 2009, so it is 16 years old, younger than the Illinois average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 575 vehicles a day, roughly 57% of them trucks, projected to reach 621 by 2046. The structure is 32 ft (9.8 m) long. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesLathrop St/Patriot
CrossesGraddett Ditch
LocationE Edge of Annawan
RouteCity Street 0
CountyHenry County
StateIllinois
Coordinates41.39703, -89.88251
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
Channel and channel protection8 Very GoodNo problems noted.
Culvert8 Very GoodNo problems noted.
Last inspectionNovember 2020
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46.4 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 20
Structure length32 ft (9.8 m)
Longest span12 ft (3.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic575 (2020)
Projected traffic621 by 2046
Trucks57%
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

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 Lathrop St/Patriot over Graddett Ditch built?

It was built in 2009, making it 16 years old in 2025.

What condition is Lathrop St/Patriot over Graddett 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 2020.

How much traffic does Lathrop St/Patriot over Graddett Ditch carry?

About 575 vehicles per day (2020 count), of which roughly 57% are trucks.

How long is Lathrop St/Patriot over Graddett Ditch?

The structure is 32 ft (9.8 m) long with a longest span of 12 ft (3.7 m).

Who owns Lathrop St/Patriot over Graddett Ditch?

It is owned by the City or Municipal Highway Agency.