US Bridges

Holcomb RD over Branch Stillman CR

Fair

Ogle County, Illinois · 6.0 MI SE Byron · Structure no. 071501400000000

Built
1959
66 years old
Condition
Fair
inspected July 2023
Type
Culvert
Concrete Continuous
Length
25 ft
2 main spans
Daily traffic
225
2022 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

Holcomb RD over Branch Stillman CR is a concrete continuous culvert carrying Holcomb RD over Branch Stillman CR in Ogle County, Illinois. It was built in 1959, so it is 66 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 28% of them trucks, projected to reach 286 by 2046. The structure is 25 ft (7.6 m) long. If it were closed, the detour would be 11.8 mi (19 km).

Location

Open in Google Maps
CarriesHolcomb RD
CrossesBranch Stillman CR
Location6.0 MI SE Byron
RouteCounty Highway 0
CountyOgle County
StateIllinois
Coordinates42.05912, -89.21831
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
Channel and channel protection7 GoodSome minor problems.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating35.1 US tons
Inventory rating20.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadHS 15
Structure length25 ft (7.6 m)
Longest span12 ft (3.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic225 (2022)
Projected traffic286 by 2046
Trucks28%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.8 mi (19 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 Holcomb RD over Branch Stillman CR built?

It was built in 1959, making it 66 years old in 2025.

What condition is Holcomb RD over Branch Stillman CR 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 Branch Stillman CR carry?

About 225 vehicles per day (2022 count), of which roughly 28% are trucks.

How long is Holcomb RD over Branch Stillman CR?

The structure is 25 ft (7.6 m) long with a longest span of 12 ft (3.7 m).

Who owns Holcomb RD over Branch Stillman CR?

It is owned by the Town or Township Highway Agency.