US Bridges

Marengo Road over Rush Creek

PoorPosted for load

McHenry County, Illinois · 0.6 MI S Airport RD · Structure no. 056302500000000

Built
1956
69 years old
Condition
Poor
inspected August 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
59 ft
2 main spans
Daily traffic
850
2021 count
Owner
City
City or Municipal Highway Agency

About this bridge

Marengo Road over Rush Creek is a prestressed concrete box beam or girders - multiple carrying Marengo Road over Rush Creek in McHenry County, Illinois. It was built in 1956, so it is 69 years old, older than the Illinois average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 2 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.

It carries about 850 vehicles a day, roughly 4% of them trucks, projected to reach 1,020 by 2046. The structure is 59 ft (18 m) long and 27 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesMarengo Road
CrossesRush Creek
Location0.6 MI S Airport RD
RouteCity Street 0
Coordinates42.39685, -88.61761
Functional classUrban Collector

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck2 CriticalAdvanced deterioration of primary structural elements. Bridge may be closed until corrective action is taken.
Superstructure2 CriticalAdvanced deterioration of primary structural elements. Bridge may be closed until corrective action is taken.
Substructure2 CriticalAdvanced deterioration of primary structural elements. Bridge may be closed until corrective action is taken.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating25.4 US tons
Inventory rating9.6 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans2
Design loadHS 15
Structure length59 ft (18 m)
Longest span28 ft (8.5 m)
Deck width27 ft (8.2 m)
Roadway width25 ft (7.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic850 (2021)
Projected traffic1,020 by 2046
Trucks4%
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

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 Marengo Road over Rush Creek built?

It was built in 1956, making it 69 years old in 2025.

What condition is Marengo Road over Rush Creek in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in August 2023.

How much traffic does Marengo Road over Rush Creek carry?

About 850 vehicles per day (2021 count), of which roughly 4% are trucks.

How long is Marengo Road over Rush Creek?

The structure is 59 ft (18 m) long with a longest span of 28 ft (8.5 m) and a deck 27 ft wide.

Who owns Marengo Road over Rush Creek?

It is owned by the City or Municipal Highway Agency.