US Bridges

Montague RD over US Rt 20

Fair

Winnebago County, Illinois · 1.5 MI E Meridian RD · Structure no. 101009400000000

Built
1964
61 years old
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
203 ft
4 main spans
Daily traffic
5,750
2022 count
Owner
State
State Highway Agency

About this bridge

Montague RD over US Rt 20 is a steel continuous stringer/multi-beam or girder carrying Montague RD over US Rt 20 in Winnebago County, Illinois. It was built in 1964, so it is 61 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 5,750 vehicles a day, roughly 9% of them trucks, projected to reach 5,909 by 2046. The structure is 203 ft (61.8 m) long and 36 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesMontague RD
CrossesUS Rt 20
Location1.5 MI E Meridian RD
CountyWinnebago County
StateIllinois
Coordinates42.24489, -89.14117
Functional classUrban Minor 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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating71.8 US tons
Inventory rating42.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length203 ft (61.8 m)
Longest span56 ft (17.2 m)
Deck width36 ft (10.9 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,750 (2022)
Projected traffic5,909 by 2046
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Montague RD over US Rt 20 built?

It was built in 1964, making it 61 years old in 2025.

What condition is Montague RD over US Rt 20 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 2023.

How much traffic does Montague RD over US Rt 20 carry?

About 5,750 vehicles per day (2022 count), of which roughly 9% are trucks.

How long is Montague RD over US Rt 20?

The structure is 203 ft (61.8 m) long with a longest span of 56 ft (17.2 m) and a deck 36 ft wide.

Who owns Montague RD over US Rt 20?

It is owned by the State Highway Agency.