US Bridges

Marengo RD over Trib W Br Union CR E

Fair

McHenry County, Illinois · 1.5MI E of US-20 · Structure no. 056316000000000

Built
1995
30 years old
Condition
Fair
inspected October 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
65 ft
1 main span
Daily traffic
3,300
2021 count
Owner
County
County Highway Agency

About this bridge

Marengo RD over Trib W Br Union CR E is a prestressed concrete box beam or girders - multiple carrying Marengo RD over Trib W Br Union CR E in McHenry County, Illinois. It was built in 1995, so it is 30 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 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 3,300 vehicles a day, roughly 5% of them trucks, projected to reach 3,960 by 2046. The structure is 65 ft (19.8 m) long and 32 ft wide.

CarriesMarengo RD
CrossesTrib W Br Union CR E
Location1.5MI E of US-20
RouteCounty Highway 0
Coordinates42.19631, -88.51758
Functional classRural Major 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
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.
Substructure8 Very GoodNo problems noted.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 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
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 rating52.1 US tons
Inventory rating31.1 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadUnknown
Structure length65 ft (19.8 m)
Longest span64 ft (19.4 m)
Deck width32 ft (9.8 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,300 (2021)
Projected traffic3,960 by 2046
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
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 Marengo RD over Trib W Br Union CR E built?

It was built in 1995, making it 30 years old in 2025.

What condition is Marengo RD over Trib W Br Union CR E 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 2024.

How much traffic does Marengo RD over Trib W Br Union CR E carry?

About 3,300 vehicles per day (2021 count), of which roughly 5% are trucks.

How long is Marengo RD over Trib W Br Union CR E?

The structure is 65 ft (19.8 m) long with a longest span of 64 ft (19.4 m) and a deck 32 ft wide.

Who owns Marengo RD over Trib W Br Union CR E?

It is owned by the County Highway Agency.