US Bridges

Alpine RD over Spring Creek

Fair

Winnebago County, Illinois · 0.1 MI S of Sprg Ck · Structure no. 101602500000000

Built
1955
70 years old, rebuilt 1963
Condition
Fair
inspected October 2023
Type
Culvert
Concrete
Length
45 ft
4 main spans
Daily traffic
20,900
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

Alpine RD over Spring Creek is a concrete culvert carrying Alpine RD over Spring Creek in Winnebago County, Illinois. It was built in 1955 and reconstructed in 1963, so it is 70 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 20,900 vehicles a day, roughly 3% of them trucks, projected to reach 26,967 by 2046. The structure is 45 ft (13.7 m) long. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesAlpine RD
CrossesSpring Creek
Location0.1 MI S of Sprg Ck
CountyWinnebago County
StateIllinois
Coordinates42.29504, -89.02913
Functional classUrban Other Principal Arterial

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 inspectionOctober 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 adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating41.8 US tons
Inventory rating25 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans4
Design loadH 20
Structure length45 ft (13.7 m)
Longest span11 ft (3.4 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20,900 (2022)
Projected traffic26,967 by 2046
Trucks3%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 Alpine RD over Spring Creek built?

It was built in 1955, making it 70 years old in 2025. It was reconstructed in 1963.

What condition is Alpine RD over Spring 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 October 2023.

How much traffic does Alpine RD over Spring Creek carry?

About 20,900 vehicles per day (2022 count), of which roughly 3% are trucks.

How long is Alpine RD over Spring Creek?

The structure is 45 ft (13.7 m) long with a longest span of 11 ft (3.4 m).

Who owns Alpine RD over Spring Creek?

It is owned by the City or Municipal Highway Agency.