US Bridges

Swanson RD over Mcdonald Creek

Fair

Winnebago County, Illinois · 0.6 MI E Rt 251 · Structure no. 101509300000000

Built
1977
48 years old
Condition
Fair
inspected April 2024
Type
Culvert
Concrete
Length
58 ft
4 main spans
Daily traffic
5,000
2022 count
Owner
County
County Highway Agency

About this bridge

Swanson RD over Mcdonald Creek is a concrete culvert carrying Swanson RD over Mcdonald Creek in Winnebago County, Illinois. It was built in 1977, so it is 48 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 5,000 vehicles a day, roughly 3% of them trucks, projected to reach 5,909 by 2046. The structure is 58 ft (17.7 m) long. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesSwanson RD
CrossesMcdonald Creek
Location0.6 MI E Rt 251
CountyWinnebago County
StateIllinois
Coordinates42.39133, -89.00526
Functional classUrban 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 protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionApril 2024
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 adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating81 US tons
Inventory rating48.6 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans4
Design loadHS 20
Structure length58 ft (17.7 m)
Longest span14 ft (4.3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,000 (2022)
Projected traffic5,909 by 2046
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 Swanson RD over Mcdonald Creek built?

It was built in 1977, making it 48 years old in 2025.

What condition is Swanson RD over Mcdonald 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 April 2024.

How much traffic does Swanson RD over Mcdonald Creek carry?

About 5,000 vehicles per day (2022 count), of which roughly 3% are trucks.

How long is Swanson RD over Mcdonald Creek?

The structure is 58 ft (17.7 m) long with a longest span of 14 ft (4.3 m).

Who owns Swanson RD over Mcdonald Creek?

It is owned by the County Highway Agency.