US Bridges

White Rock Road over Br Stillman Creek

Good

Ogle County, Illinois · 3.0 SW Holcomb · Structure no. 071507000000000

Built
1978
47 years old
Condition
Good
inspected July 2021
Type
Culvert
Concrete
Length
26 ft
2 main spans
Daily traffic
250
2022 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

White Rock Road over Br Stillman Creek is a concrete culvert carrying White Rock Road over Br Stillman Creek in Ogle County, Illinois. It was built in 1978, so it is 47 years old, older than the Illinois average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 250 vehicles a day, roughly 26% of them trucks, projected to reach 208 by 2046. The structure is 26 ft (7.9 m) long and 31 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesWhite Rock Road
CrossesBr Stillman Creek
Location3.0 SW Holcomb
RouteCounty Highway 0
CountyOgle County
StateIllinois
Coordinates42.03063, -89.13387
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionJuly 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.9 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 20
Structure length26 ft (7.9 m)
Longest span12 ft (3.7 m)
Deck width31 ft (9.5 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic250 (2022)
Projected traffic208 by 2046
Trucks26%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerTown or Township Highway Agency
Maintained byTown or Township 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 White Rock Road over Br Stillman Creek built?

It was built in 1978, making it 47 years old in 2025.

What condition is White Rock Road over Br Stillman Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in July 2021.

How much traffic does White Rock Road over Br Stillman Creek carry?

About 250 vehicles per day (2022 count), of which roughly 26% are trucks.

How long is White Rock Road over Br Stillman Creek?

The structure is 26 ft (7.9 m) long with a longest span of 12 ft (3.7 m) and a deck 31 ft wide.

Who owns White Rock Road over Br Stillman Creek?

It is owned by the Town or Township Highway Agency.