US Bridges

Ill 16 over Adams Creek

Fair

Macoupin County, Illinois · 4.0 M W Gillespie · Structure no. 059200000000000

Built
1937
88 years old
Condition
Fair
inspected April 2023
Type
Culvert
Concrete
Length
43 ft
4 main spans
Daily traffic
1,750
2023 count
Owner
State
State Highway Agency

About this bridge

Ill 16 over Adams Creek is a concrete culvert carrying Ill 16 over Adams Creek in Macoupin County, Illinois. It was built in 1937, so it is 88 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 1,750 vehicles a day, roughly 7% of them trucks, projected to reach 2,121 by 2046. The structure is 43 ft (13.2 m) long. If it were closed, the detour would be 18 mi (29 km).

CarriesIll 16
CrossesAdams Creek
Location4.0 M W Gillespie
RouteState Highway 16
Coordinates39.12904, -89.90379
Functional classRural Principal Arterial - Other

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 inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating57.1 US tons
Inventory rating34.3 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans4
Design loadH 15
Structure length43 ft (13.2 m)
Longest span10 ft (2.9 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,750 (2023)
Projected traffic2,121 by 2046
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed18 mi (29 km)
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 Ill 16 over Adams Creek built?

It was built in 1937, making it 88 years old in 2025.

What condition is Ill 16 over Adams Creek 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 April 2023.

How much traffic does Ill 16 over Adams Creek carry?

About 1,750 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is Ill 16 over Adams Creek?

The structure is 43 ft (13.2 m) long with a longest span of 10 ft (2.9 m).

Who owns Ill 16 over Adams Creek?

It is owned by the State Highway Agency.