US Bridges

Il 177 over Queens Lake Branch

Good

Clinton County, Illinois · 0.2M E New Memphis · Structure no. 014007200000000

Built
1997
28 years old
Condition
Good
inspected July 2024
Type
Slab
Concrete Continuous
Length
123 ft
3 main spans
Daily traffic
2,000
2023 count
Owner
State
State Highway Agency

About this bridge

Il 177 over Queens Lake Branch is a concrete continuous slab carrying Il 177 over Queens Lake Branch in Clinton County, Illinois. It was built in 1997, so it is 28 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 2,000 vehicles a day, roughly 12% of them trucks, projected to reach 2,255 by 2046. The structure is 123 ft (37.4 m) long and 35 ft wide. If it were closed, the detour would be 60.3 mi (97 km).

Location

Open in Google Maps
CarriesIl 177
CrossesQueens Lake Branch
Location0.2M E New Memphis
RouteState Highway 160
CountyClinton County
StateIllinois
Coordinates38.47058, -89.67728
Functional classRural Minor Arterial

Condition and inspection

Good

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

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating70 US tons
Inventory rating42.1 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length123 ft (37.4 m)
Longest span45 ft (13.7 m)
Deck width35 ft (10.7 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,000 (2023)
Projected traffic2,255 by 2046
Trucks12%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed60.3 mi (97 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Il 177 over Queens Lake Branch built?

It was built in 1997, making it 28 years old in 2025.

What condition is Il 177 over Queens Lake Branch 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 July 2024.

How much traffic does Il 177 over Queens Lake Branch carry?

About 2,000 vehicles per day (2023 count), of which roughly 12% are trucks.

How long is Il 177 over Queens Lake Branch?

The structure is 123 ft (37.4 m) long with a longest span of 45 ft (13.7 m) and a deck 35 ft wide.

Who owns Il 177 over Queens Lake Branch?

It is owned by the State Highway Agency.