US Bridges

FAP-783 (ILL-33) over Allison Ditch 3

Fair

Lawrence County, Illinois · 0.5 MI W of Westport · Structure no. 051200000000000

Built
1961
64 years old
Condition
Fair
inspected June 2023
Type
Culvert
Concrete
Length
43 ft
3 main spans
Daily traffic
4,200
2023 count
Owner
State
State Highway Agency

About this bridge

FAP-783 (ILL-33) over Allison Ditch 3 is a concrete culvert carrying FAP-783 (ILL-33) over Allison Ditch 3 in Lawrence County, Illinois. It was built in 1961, so it is 64 years old, older than the Illinois average of 45.3 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 4,200 vehicles a day, roughly 4% of them trucks, projected to reach 4,949 by 2046. The structure is 43 ft (13.1 m) long. If it were closed, the detour would be 5 mi (8 km).

CarriesFAP-783 (ILL-33)
CrossesAllison Ditch 3
Location0.5 MI W of Westport
RouteState Highway 33
Coordinates38.69627, -87.55346
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
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating58.2 US tons
Inventory rating34.6 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadHS 20
Structure length43 ft (13.1 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 traffic4,200 (2023)
Projected traffic4,949 by 2046
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 FAP-783 (ILL-33) over Allison Ditch 3 built?

It was built in 1961, making it 64 years old in 2025.

What condition is FAP-783 (ILL-33) over Allison Ditch 3 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 June 2023.

How much traffic does FAP-783 (ILL-33) over Allison Ditch 3 carry?

About 4,200 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is FAP-783 (ILL-33) over Allison Ditch 3?

The structure is 43 ft (13.1 m) long with a longest span of 12 ft (3.7 m).

Who owns FAP-783 (ILL-33) over Allison Ditch 3?

It is owned by the State Highway Agency.