US Bridges

Ill 9 over Dillon Creek

Poor

Tazewell County, Illinois · 1 MI W of Tremont · Structure no. 090006000000000

Built
1962
63 years old
Condition
Poor
inspected July 2024
Type
Slab
Concrete Continuous
Length
93 ft
3 main spans
Daily traffic
5,200
2023 count
Owner
State
State Highway Agency

About this bridge

Ill 9 over Dillon Creek is a concrete continuous slab carrying Ill 9 over Dillon Creek in Tazewell County, Illinois. It was built in 1962, so it is 63 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 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 5,200 vehicles a day, roughly 11% of them trucks, projected to reach 7,272 by 2046. The structure is 93 ft (28.3 m) long and 36 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesIll 9
CrossesDillon Creek
Location1 MI W of Tremont
RouteState Highway 9
CountyTazewell County
StateIllinois
Coordinates40.53297, -89.51246
Functional classRural Principal Arterial - Other

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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2024
Inspection intervalevery 12 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 geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating53.2 US tons
Inventory rating31.7 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length93 ft (28.3 m)
Longest span34 ft (10.4 m)
Deck width36 ft (11 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,200 (2023)
Projected traffic7,272 by 2046
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$666,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Ill 9 over Dillon Creek built?

It was built in 1962, making it 63 years old in 2025.

What condition is Ill 9 over Dillon 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 July 2024.

How much traffic does Ill 9 over Dillon Creek carry?

About 5,200 vehicles per day (2023 count), of which roughly 11% are trucks.

How long is Ill 9 over Dillon Creek?

The structure is 93 ft (28.3 m) long with a longest span of 34 ft (10.4 m) and a deck 36 ft wide.

Who owns Ill 9 over Dillon Creek?

It is owned by the State Highway Agency.