US Bridges

Il 161 NB over Dutchhollow Metrolink CR

Good

St. Clair County, Illinois · 2.2 MI SE of Il 157 · Structure no. 082029000000000

Built
1992
33 years old
Condition
Good
inspected April 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
362 ft
4 main spans
Daily traffic
14,800
2023 count
Owner
State
State Highway Agency

About this bridge

Il 161 NB over Dutchhollow Metrolink CR is a steel continuous stringer/multi-beam or girder carrying Il 161 NB over Dutchhollow Metrolink CR in St. Clair County, Illinois. It was built in 1992, so it is 33 years old, younger than the Illinois average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 14,800 vehicles a day, roughly 4% of them trucks, projected to reach 6,464 by 2046. The structure is 362 ft (110.3 m) long and 46 ft wide. If it were closed, the detour would be 11.8 mi (19 km).

Location

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CarriesIl 161 NB
CrossesDutchhollow Metrolink CR
Location2.2 MI SE of Il 157
RouteState Highway 161
CountySt. Clair County
StateIllinois
Coordinates38.5716, -90.03595
Functional classUrban Other Principal Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionApril 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating70.3 US tons
Inventory rating41.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length362 ft (110.3 m)
Longest span95 ft (29.1 m)
Deck width46 ft (14.1 m)
Roadway width43 ft (13.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic14,800 (2023)
Projected traffic6,464 by 2046
Trucks4%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway, waterway and railroad
Detour if closed11.8 mi (19 km)
TollOn a free road
National Highway SystemYes

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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Il 161 NB over Dutchhollow Metrolink CR built?

It was built in 1992, making it 33 years old in 2025.

What condition is Il 161 NB over Dutchhollow Metrolink CR in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in April 2023.

How much traffic does Il 161 NB over Dutchhollow Metrolink CR carry?

About 14,800 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is Il 161 NB over Dutchhollow Metrolink CR?

The structure is 362 ft (110.3 m) long with a longest span of 95 ft (29.1 m) and a deck 46 ft wide.

Who owns Il 161 NB over Dutchhollow Metrolink CR?

It is owned by the State Highway Agency.