US Bridges

Glidden RD over Lee Slough Creek

Poor

DeKalb County, Illinois · 2955N 850E · Structure no. 019304900000000

Built
1997
28 years old
Condition
Poor
inspected February 2024
Type
Channel Beam
Concrete
Length
40 ft
1 main span
Daily traffic
3,550
2021 count
Owner
County
County Highway Agency

About this bridge

Glidden RD over Lee Slough Creek is a concrete channel beam carrying Glidden RD over Lee Slough Creek in DeKalb 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 poor condition with a lowest component rating of 3 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 3,550 vehicles a day, roughly 11% of them trucks, projected to reach 3,976 by 2046. The structure is 40 ft (12.2 m) long and 41 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesGlidden RD
CrossesLee Slough Creek
Location2955N 850E
RouteCounty Highway 0
CountyDeKalb County
StateIllinois
Coordinates42.06089, -88.78352
Functional classRural Major 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
Deck7 GoodSome minor problems.
Superstructure3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating54.7 US tons
Inventory rating32.5 US tons

Structure

Structure typeChannel Beam
MaterialConcrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length40 ft (12.2 m)
Longest span37 ft (11.3 m)
Deck width41 ft (12.6 m)
Roadway width41 ft (12.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,550 (2021)
Projected traffic3,976 by 2046
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
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 Glidden RD over Lee Slough Creek built?

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

What condition is Glidden RD over Lee Slough 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 February 2024.

How much traffic does Glidden RD over Lee Slough Creek carry?

About 3,550 vehicles per day (2021 count), of which roughly 11% are trucks.

How long is Glidden RD over Lee Slough Creek?

The structure is 40 ft (12.2 m) long with a longest span of 37 ft (11.3 m) and a deck 41 ft wide.

Who owns Glidden RD over Lee Slough Creek?

It is owned by the County Highway Agency.