US Bridges

Il 121 (fap 773) over Otter Creek

Poor

Cumberland County, Illinois · 3.0 MI E 7 MI Curve · Structure no. 018200400000000

Built
1933
92 years old, rebuilt 1971
Condition
Poor
inspected December 2024
Type
Culvert
Concrete
Length
24 ft
2 main spans
Daily traffic
1,600
2023 count
Owner
State
State Highway Agency

About this bridge

Il 121 (fap 773) over Otter Creek is a concrete culvert carrying Il 121 (fap 773) over Otter Creek in Cumberland County, Illinois. It was built in 1933 and reconstructed in 1971, so it is 92 years old, older than the Illinois average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 1,600 vehicles a day, roughly 17% of them trucks, projected to reach 1,768 by 2046. The structure is 24 ft (7.3 m) long and 64 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesIl 121 (fap 773)
CrossesOtter Creek
Location3.0 MI E 7 MI Curve
RouteState Highway 121
CountyCumberland County
StateIllinois
Coordinates39.27271, -88.32299
Functional classRural Minor Arterial

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionDecember 2024
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating98.2 US tons
Inventory rating98.2 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadUnknown
Structure length24 ft (7.3 m)
Longest span11 ft (3.4 m)
Deck width64 ft (19.4 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,600 (2023)
Projected traffic1,768 by 2046
Trucks17%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 Il 121 (fap 773) over Otter Creek built?

It was built in 1933, making it 92 years old in 2025. It was reconstructed in 1971.

What condition is Il 121 (fap 773) over Otter Creek in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in December 2024.

How much traffic does Il 121 (fap 773) over Otter Creek carry?

About 1,600 vehicles per day (2023 count), of which roughly 17% are trucks.

How long is Il 121 (fap 773) over Otter Creek?

The structure is 24 ft (7.3 m) long with a longest span of 11 ft (3.4 m) and a deck 64 ft wide.

Who owns Il 121 (fap 773) over Otter Creek?

It is owned by the State Highway Agency.