US Bridges

Rock Cut St. Pk. R over I-90 (nw Tollway)

Fair

Winnebago County, Illinois · 1.5 Mi. S. of Il 173 · Structure no. 101996100000000

Built
1989
36 years old
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
212 ft
2 main spans
Daily traffic
900
2017 count
Owner
State
State Park, Forest, or Reservation Agency

About this bridge

Rock Cut St. Pk. R over I-90 (nw Tollway) is a prestressed concrete stringer/multi-beam or girder carrying Rock Cut St. Pk. R over I-90 (nw Tollway) in Winnebago County, Illinois. It was built in 1989, so it is 36 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 900 vehicles a day, projected to reach 909 by 2046. The structure is 212 ft (64.5 m) long and 33 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesRock Cut St. Pk. R
CrossesI-90 (nw Tollway)
Location1.5 Mi. S. of Il 173
CountyWinnebago County
StateIllinois
Coordinates42.3477, -88.9644
Functional classUrban 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
Deck8 Very GoodNo problems noted.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating67.9 US tons
Inventory rating40.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans2
Design loadHS 20
Structure length212 ft (64.5 m)
Longest span105 ft (31.9 m)
Deck width33 ft (10.2 m)
Roadway width26 ft (8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic900 (2017)
Projected traffic909 by 2046
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Park, Forest, or Reservation Agency
Maintained byState Park, Forest, or Reservation Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Rock Cut St. Pk. R over I-90 (nw Tollway) built?

It was built in 1989, making it 36 years old in 2025.

What condition is Rock Cut St. Pk. R over I-90 (nw Tollway) 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 2024.

How much traffic does Rock Cut St. Pk. R over I-90 (nw Tollway) carry?

About 900 vehicles per day (2017 count).

How long is Rock Cut St. Pk. R over I-90 (nw Tollway)?

The structure is 212 ft (64.5 m) long with a longest span of 105 ft (31.9 m) and a deck 33 ft wide.

Who owns Rock Cut St. Pk. R over I-90 (nw Tollway)?

It is owned by the State Park, Forest, or Reservation Agency.