US Bridges

US 36(FAP 323) over Lake Fork River

Good

Douglas County, Illinois · W Edge of Atwood · Structure no. 021005100000000

Built
1987
38 years old
Condition
Good
inspected February 2022
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
183 ft
3 main spans
Daily traffic
3,950
2023 count
Owner
State
State Highway Agency

About this bridge

US 36(FAP 323) over Lake Fork River is a prestressed concrete continuous stringer/multi-beam or girder carrying US 36(FAP 323) over Lake Fork River in Douglas County, Illinois. It was built in 1987, so it is 38 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 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 3,950 vehicles a day, roughly 16% of them trucks, projected to reach 4,394 by 2046. The structure is 183 ft (55.8 m) long and 39 ft wide.

CarriesUS 36(FAP 323)
CrossesLake Fork River
LocationW Edge of Atwood
RouteU.S. Route 36
Coordinates39.79182, -88.46294
Functional classRural Principal Arterial - Other

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.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionFebruary 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable 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 rating94.2 US tons
Inventory rating46.7 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length183 ft (55.8 m)
Longest span64 ft (19.4 m)
Deck width39 ft (11.9 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,950 (2023)
Projected traffic4,394 by 2046
Trucks16%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
TollOn a free road
National Highway SystemYes

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 US 36(FAP 323) over Lake Fork River built?

It was built in 1987, making it 38 years old in 2025.

What condition is US 36(FAP 323) over Lake Fork River 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 February 2022.

How much traffic does US 36(FAP 323) over Lake Fork River carry?

About 3,950 vehicles per day (2023 count), of which roughly 16% are trucks.

How long is US 36(FAP 323) over Lake Fork River?

The structure is 183 ft (55.8 m) long with a longest span of 64 ft (19.4 m) and a deck 39 ft wide.

Who owns US 36(FAP 323) over Lake Fork River?

It is owned by the State Highway Agency.