US Bridges

US 30 East Bound over Desplaines River

Poor

Will County, Illinois · 0.8 MI W of Ill 171 · Structure no. 099016600000000

Built
1933
92 years old, rebuilt 1987
Condition
Poor
inspected June 2024
Type
Movable - Bascule
Steel
Length
331 ft
1 main span
Daily traffic
11,110
2023 count
Owner
State
State Highway Agency

About this bridge

US 30 East Bound over Desplaines River is a steel movable - bascule carrying US 30 East Bound over Desplaines River in Will County, Illinois. It was built in 1933 and reconstructed in 1987, so it is 92 years old, older 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 2 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 11,110 vehicles a day, roughly 3% of them trucks, projected to reach 11,111 by 2033. The structure is 331 ft (100.9 m) long and 56 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesUS 30 East Bound
CrossesDesplaines River
Location0.8 MI W of Ill 171
RouteU.S. Route 30
Coordinates41.52489, -88.08707
Functional classUrban Other Principal Arterial

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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure2 CriticalAdvanced deterioration of primary structural elements. Bridge may be closed until corrective action is taken.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2024
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating50.7 US tons
Inventory rating30.3 US tons

Structure

Structure typeMovable - Bascule
MaterialSteel
DeckOpen grating
Main spans1 (+4 approach)
Design loadHS 20 + Mod
Structure length331 ft (100.9 m)
Longest span166 ft (50.6 m)
Deck width56 ft (17.1 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,110 (2023)
Projected traffic11,111 by 2033
Trucks3%
Lanes on structure4
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$3.7 million
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was US 30 East Bound over Desplaines River built?

It was built in 1933, making it 92 years old in 2025. It was reconstructed in 1987.

What condition is US 30 East Bound over Desplaines River 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 June 2024.

How much traffic does US 30 East Bound over Desplaines River carry?

About 11,110 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is US 30 East Bound over Desplaines River?

The structure is 331 ft (100.9 m) long with a longest span of 166 ft (50.6 m) and a deck 56 ft wide.

Who owns US 30 East Bound over Desplaines River?

It is owned by the State Highway Agency.