US Bridges

FAU-8556 over Salem Reservoir Dam

Fair

Marion County, Illinois · Salem · Structure no. 061600900000000

Built
1993
32 years old
Condition
Fair
inspected February 2025
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
65 ft
1 main span
Daily traffic
475
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

FAU-8556 over Salem Reservoir Dam is a prestressed concrete box beam or girders - multiple carrying FAU-8556 over Salem Reservoir Dam in Marion County, Illinois. It was built in 1993, so it is 32 years old, younger 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 6 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 475 vehicles a day, roughly 4% of them trucks, projected to reach 606 by 2046. The structure is 65 ft (19.8 m) long and 24 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesFAU-8556
CrossesSalem Reservoir Dam
LocationSalem
CountyMarion County
StateIllinois
Coordinates38.64119, -88.94727
Functional classUrban Collector

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionFebruary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating48.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length65 ft (19.8 m)
Longest span62 ft (18.9 m)
Deck width24 ft (7.4 m)
Roadway width24 ft (7.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic475 (2022)
Projected traffic606 by 2046
Trucks4%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 FAU-8556 over Salem Reservoir Dam built?

It was built in 1993, making it 32 years old in 2025.

What condition is FAU-8556 over Salem Reservoir Dam 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 February 2025.

How much traffic does FAU-8556 over Salem Reservoir Dam carry?

About 475 vehicles per day (2022 count), of which roughly 4% are trucks.

How long is FAU-8556 over Salem Reservoir Dam?

The structure is 65 ft (19.8 m) long with a longest span of 62 ft (18.9 m) and a deck 24 ft wide.

Who owns FAU-8556 over Salem Reservoir Dam?

It is owned by the City or Municipal Highway Agency.