US Bridges

Blackwood RD over Br of Killbuck CR

Good

Ogle County, Illinois · 3 MI SW Monroe Centr · Structure no. 071511300000000

Built
2001
24 years old
Condition
Good
inspected July 2021
Type
Culvert
Concrete
Length
29 ft
2 main spans
Daily traffic
75
2017 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

Blackwood RD over Br of Killbuck CR is a concrete culvert carrying Blackwood RD over Br of Killbuck CR in Ogle County, Illinois. It was built in 2001, so it is 24 years old, younger 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 75 vehicles a day, projected to reach 78 by 2046. The structure is 29 ft (8.9 m) long. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesBlackwood RD
CrossesBr of Killbuck CR
Location3 MI SW Monroe Centr
RouteCounty Highway 0
CountyOgle County
StateIllinois
Coordinates42.08419, -89.05635
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert8 Very GoodNo problems noted.
Last inspectionJuly 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 20
Structure length29 ft (8.9 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 traffic75 (2017)
Projected traffic78 by 2046
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 Blackwood RD over Br of Killbuck CR built?

It was built in 2001, making it 24 years old in 2025.

What condition is Blackwood RD over Br of Killbuck CR 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 Blackwood RD over Br of Killbuck CR carry?

About 75 vehicles per day (2017 count).

How long is Blackwood RD over Br of Killbuck CR?

The structure is 29 ft (8.9 m) long with a longest span of 12 ft (3.7 m).

Who owns Blackwood RD over Br of Killbuck CR?

It is owned by the Town or Township Highway Agency.