US Bridges

Il 101 over Rocky Hollow Creek

Fair

Schuyler County, Illinois · 3.15M E IL61-AUGUSTA · Structure no. 085200400000000

Built
1929
96 years old
Condition
Fair
inspected January 2024
Type
Culvert
Concrete
Length
43 ft
3 main spans
Daily traffic
400
2023 count
Owner
State
State Highway Agency

About this bridge

Il 101 over Rocky Hollow Creek is a concrete culvert carrying Il 101 over Rocky Hollow Creek in Schuyler County, Illinois. It was built in 1929, so it is 96 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 400 vehicles a day, roughly 16% of them trucks, projected to reach 480 by 2046. The structure is 43 ft (13 m) long. If it were closed, the detour would be 29.8 mi (48 km).

Location

Open in Google Maps
CarriesIl 101
CrossesRocky Hollow Creek
Location3.15M E IL61-AUGUSTA
RouteState Highway 101
CountySchuyler County
StateIllinois
Coordinates40.22625, -90.89161
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJanuary 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
Waterway adequacy9: Superior to present desirable 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 spans3
Design loadUnknown
Structure length43 ft (13 m)
Longest span13 ft (3.9 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic400 (2023)
Projected traffic480 by 2046
Trucks16%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed29.8 mi (48 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 101 over Rocky Hollow Creek built?

It was built in 1929, making it 96 years old in 2025.

What condition is Il 101 over Rocky Hollow 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 January 2024.

How much traffic does Il 101 over Rocky Hollow Creek carry?

About 400 vehicles per day (2023 count), of which roughly 16% are trucks.

How long is Il 101 over Rocky Hollow Creek?

The structure is 43 ft (13 m) long with a longest span of 13 ft (3.9 m).

Who owns Il 101 over Rocky Hollow Creek?

It is owned by the State Highway Agency.