US Bridges

1500 E over Mchenry Slough

Poor

White County, Illinois · 3 MI N of Epworth · Structure no. 097326000000000

Built
2008
17 years old
Condition
Poor
inspected March 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
52 ft
1 main span
Daily traffic
225
2024 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

1500 E over Mchenry Slough is a prestressed concrete box beam or girders - multiple carrying 1500 E over Mchenry Slough in White County, Illinois. It was built in 2008, so it is 17 years old, younger 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 4 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.

It carries about 225 vehicles a day, roughly 34% of them trucks, projected to reach 227 by 2046. The structure is 52 ft (16 m) long and 24 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
Carries1500 E
CrossesMchenry Slough
Location3 MI N of Epworth
RouteCounty Highway 0
CountyWhite County
StateIllinois
Coordinates38.11058, -88.09728
Functional classRural Local

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
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.3 US tons
Inventory rating35.4 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length52 ft (16 m)
Longest span50 ft (15.2 m)
Deck width24 ft (7.3 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic225 (2024)
Projected traffic227 by 2046
Trucks34%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerTown or Township Highway Agency
Maintained byTown or Township 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 1500 E over Mchenry Slough built?

It was built in 2008, making it 17 years old in 2025.

What condition is 1500 E over Mchenry Slough 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 March 2023.

How much traffic does 1500 E over Mchenry Slough carry?

About 225 vehicles per day (2024 count), of which roughly 34% are trucks.

How long is 1500 E over Mchenry Slough?

The structure is 52 ft (16 m) long with a longest span of 50 ft (15.2 m) and a deck 24 ft wide.

Who owns 1500 E over Mchenry Slough?

It is owned by the Town or Township Highway Agency.