US Bridges

Ill 15 over Nashville Creek W Branch

Fair

Washington County, Illinois · 0.2 MI W Nashville · Structure no. 095000900000000

Built
1921
104 years old, rebuilt 1960
Condition
Fair
inspected March 2024
Type
Slab
Concrete
Length
26 ft
1 main span
Daily traffic
3,450
2023 count
Owner
State
State Highway Agency

About this bridge

Ill 15 over Nashville Creek W Branch is a concrete slab carrying Ill 15 over Nashville Creek W Branch in Washington County, Illinois. It was built in 1921 and reconstructed in 1960, so it is 104 years old, older than the Illinois average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 3,450 vehicles a day, roughly 11% of them trucks, projected to reach 4,477 by 2046. The structure is 26 ft (7.9 m) long and 47 ft wide. If it were closed, the detour would be 26.7 mi (43 km).

Location

Open in Google Maps
CarriesIll 15
CrossesNashville Creek W Branch
Location0.2 MI W Nashville
RouteState Highway 15
CountyWashington County
StateIllinois
Coordinates38.34449, -89.40051
Functional classRural Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating56.4 US tons
Inventory rating34 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length26 ft (7.9 m)
Longest span25 ft (7.6 m)
Deck width47 ft (14.2 m)
Roadway width43 ft (13.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,450 (2023)
Projected traffic4,477 by 2046
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed26.7 mi (43 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 Ill 15 over Nashville Creek W Branch built?

It was built in 1921, making it 104 years old in 2025. It was reconstructed in 1960.

What condition is Ill 15 over Nashville Creek W Branch in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in March 2024.

How much traffic does Ill 15 over Nashville Creek W Branch carry?

About 3,450 vehicles per day (2023 count), of which roughly 11% are trucks.

How long is Ill 15 over Nashville Creek W Branch?

The structure is 26 ft (7.9 m) long with a longest span of 25 ft (7.6 m) and a deck 47 ft wide.

Who owns Ill 15 over Nashville Creek W Branch?

It is owned by the State Highway Agency.