US Bridges

Stillman Road over Stillman Creek

Fair

Ogle County, Illinois · N Edge Stillman Vall · Structure no. 071329000000000

Built
1986
39 years old
Condition
Fair
inspected July 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
106 ft
2 main spans
Daily traffic
2,350
2022 count
Owner
County
County Highway Agency

About this bridge

Stillman Road over Stillman Creek is a prestressed concrete box beam or girders - multiple carrying Stillman Road over Stillman Creek in Ogle County, Illinois. It was built in 1986, so it is 39 years old, younger 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 2,350 vehicles a day, roughly 8% of them trucks, projected to reach 2,340 by 2046. The structure is 106 ft (32.3 m) long and 40 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesStillman Road
CrossesStillman Creek
LocationN Edge Stillman Vall
RouteCounty Highway 0
CountyOgle County
StateIllinois
Coordinates42.11221, -89.18015
Functional classUrban 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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJuly 2023
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 geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46.4 US tons
Inventory rating27.9 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans2
Design loadHS 20
Structure length106 ft (32.3 m)
Longest span51 ft (15.5 m)
Deck width40 ft (12.2 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,350 (2022)
Projected traffic2,340 by 2046
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 km)
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 Stillman Road over Stillman Creek built?

It was built in 1986, making it 39 years old in 2025.

What condition is Stillman Road over Stillman 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 July 2023.

How much traffic does Stillman Road over Stillman Creek carry?

About 2,350 vehicles per day (2022 count), of which roughly 8% are trucks.

How long is Stillman Road over Stillman Creek?

The structure is 106 ft (32.3 m) long with a longest span of 51 ft (15.5 m) and a deck 40 ft wide.

Who owns Stillman Road over Stillman Creek?

It is owned by the County Highway Agency.