US Bridges

FAS 946 over Drainage Ditch

Fair

Alexander County, Illinois · 2.6 MI S Olive Br. · Structure no. 002500000000000

Built
1962
63 years old
Condition
Fair
inspected September 2023
Type
Culvert
Concrete
Length
36 ft
3 main spans
Daily traffic
125
2022 count
Owner
County
County Highway Agency

About this bridge

FAS 946 over Drainage Ditch is a concrete culvert carrying FAS 946 over Drainage Ditch in Alexander County, Illinois. It was built in 1962, so it is 63 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 125 vehicles a day, roughly 14% of them trucks, projected to reach 278 by 2046. The structure is 36 ft (11 m) long and 31 ft wide.

Location

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CarriesFAS 946
CrossesDrainage Ditch
Location2.6 MI S Olive Br.
RouteCounty Highway 0
CountyAlexander County
StateIllinois
Coordinates37.13414, -89.36541
Functional classRural Major Collector

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 protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating39.7 US tons
Inventory rating23.9 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 15
Structure length36 ft (11 m)
Longest span12 ft (3.7 m)
Deck width31 ft (9.6 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic125 (2022)
Projected traffic278 by 2046
Trucks14%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was FAS 946 over Drainage Ditch built?

It was built in 1962, making it 63 years old in 2025.

What condition is FAS 946 over Drainage 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 September 2023.

How much traffic does FAS 946 over Drainage Ditch carry?

About 125 vehicles per day (2022 count), of which roughly 14% are trucks.

How long is FAS 946 over Drainage Ditch?

The structure is 36 ft (11 m) long with a longest span of 12 ft (3.7 m) and a deck 31 ft wide.

Who owns FAS 946 over Drainage Ditch?

It is owned by the County Highway Agency.