US Bridges

Harrison Road over Tunnison Creek

Fair

Winnebago County, Illinois · 1.9 MI N Trask Br RD · Structure no. 101203700000000

Built
1992
33 years old
Condition
Fair
inspected May 2023
Type
Culvert
Concrete
Length
25 ft
2 main spans
Daily traffic
225
2023 count
Owner
State
State Highway Agency

About this bridge

Harrison Road over Tunnison Creek is a concrete culvert carrying Harrison Road over Tunnison Creek in Winnebago County, Illinois. It was built in 1992, so it is 33 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 6 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 8% of them trucks, projected to reach 303 by 2046. The structure is 25 ft (7.6 m) long. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesHarrison Road
CrossesTunnison Creek
Location1.9 MI N Trask Br RD
RouteCounty Highway 0
CountyWinnebago County
StateIllinois
Coordinates42.36226, -89.18511
Functional classRural Local

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 protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating73.5 US tons
Inventory rating43.5 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
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 (2023)
Projected traffic303 by 2046
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 Harrison Road over Tunnison Creek built?

It was built in 1992, making it 33 years old in 2025.

What condition is Harrison Road over Tunnison 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 May 2023.

How much traffic does Harrison Road over Tunnison Creek carry?

About 225 vehicles per day (2023 count), of which roughly 8% are trucks.

How long is Harrison Road over Tunnison Creek?

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

Who owns Harrison Road over Tunnison Creek?

It is owned by the State Highway Agency.