US Bridges

Holcomb RD over Stillman Creek

Fair

Ogle County, Illinois · 3 MI S Stillman Val. · Structure no. 071303100000000

Built
1967
58 years old
Condition
Fair
inspected July 2023
Type
Slab
Concrete Continuous
Length
72 ft
3 main spans
Daily traffic
225
2022 count
Owner
County
County Highway Agency

About this bridge

Holcomb RD over Stillman Creek is a concrete continuous slab carrying Holcomb RD over Stillman Creek in Ogle County, Illinois. It was built in 1967, so it is 58 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 225 vehicles a day, roughly 16% of them trucks, projected to reach 286 by 2046. The structure is 72 ft (21.9 m) long and 30 ft wide. If it were closed, the detour would be 14.9 mi (24 km).

Location

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CarriesHolcomb RD
CrossesStillman Creek
Location3 MI S Stillman Val.
RouteCounty Highway 0
CountyOgle County
StateIllinois
Coordinates42.06333, -89.16641
Functional classRural Minor Collector

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.
Substructure8 Very GoodNo problems noted.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating50.4 US tons
Inventory rating30 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 15
Structure length72 ft (21.9 m)
Longest span27 ft (8.2 m)
Deck width30 ft (9.1 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic225 (2022)
Projected traffic286 by 2046
Trucks16%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.9 mi (24 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 Holcomb RD over Stillman Creek built?

It was built in 1967, making it 58 years old in 2025.

What condition is Holcomb RD 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 Holcomb RD over Stillman Creek carry?

About 225 vehicles per day (2022 count), of which roughly 16% are trucks.

How long is Holcomb RD over Stillman Creek?

The structure is 72 ft (21.9 m) long with a longest span of 27 ft (8.2 m) and a deck 30 ft wide.

Who owns Holcomb RD over Stillman Creek?

It is owned by the County Highway Agency.