US Bridges

Il 16 over Big 4 Resvr Ovrfl

Fair

Montgomery County, Illinois · Schram City 1M E Wcl · Structure no. 068001100000000

Built
1925
100 years old, rebuilt 1953
Condition
Fair
inspected September 2024
Type
Slab
Concrete
Length
33 ft
1 main span
Daily traffic
2,900
2023 count
Owner
State
State Highway Agency

About this bridge

Il 16 over Big 4 Resvr Ovrfl is a concrete slab carrying Il 16 over Big 4 Resvr Ovrfl in Montgomery County, Illinois. It was built in 1925 and reconstructed in 1953, so it is 100 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 5 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 2,900 vehicles a day, roughly 8% of them trucks, projected to reach 3,182 by 2046. The structure is 33 ft (10 m) long and 37 ft wide. If it were closed, the detour would be 18 mi (29 km).

Location

Open in Google Maps
CarriesIl 16
CrossesBig 4 Resvr Ovrfl
LocationSchram City 1M E Wcl
RouteState Highway 16
CountyMontgomery County
StateIllinois
Coordinates39.16424, -89.46416
Functional classUrban Other Principal 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating61.4 US tons
Inventory rating36.8 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length33 ft (10 m)
Longest span30 ft (9.1 m)
Deck width37 ft (11.2 m)
Roadway width29 ft (8.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,900 (2023)
Projected traffic3,182 by 2046
Trucks8%
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 Il 16 over Big 4 Resvr Ovrfl built?

It was built in 1925, making it 100 years old in 2025. It was reconstructed in 1953.

What condition is Il 16 over Big 4 Resvr Ovrfl 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 2024.

How much traffic does Il 16 over Big 4 Resvr Ovrfl carry?

About 2,900 vehicles per day (2023 count), of which roughly 8% are trucks.

How long is Il 16 over Big 4 Resvr Ovrfl?

The structure is 33 ft (10 m) long with a longest span of 30 ft (9.1 m) and a deck 37 ft wide.

Who owns Il 16 over Big 4 Resvr Ovrfl?

It is owned by the State Highway Agency.