US Bridges

FAS 556 (ch 28) over Trib Sangamon River

Fair

Macon County, Illinois · SW Edge of Decatur · Structure no. 058334200000000

Built
2000
25 years old
Condition
Fair
inspected December 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
65 ft
1 main span
Daily traffic
650
2020 count
Owner
County
County Highway Agency

About this bridge

FAS 556 (ch 28) over Trib Sangamon River is a prestressed concrete box beam or girders - multiple carrying FAS 556 (ch 28) over Trib Sangamon River in Macon County, Illinois. It was built in 2000, so it is 25 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 650 vehicles a day, roughly 9% of them trucks, projected to reach 657 by 2046. The structure is 65 ft (19.8 m) long and 33 ft wide. If it were closed, the detour would be 5 mi (8 km).

CarriesFAS 556 (ch 28)
CrossesTrib Sangamon River
LocationSW Edge of Decatur
RouteCounty Highway 0
Coordinates39.79743, -89.01971
Functional classRural Major 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.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating48.6 US tons
Inventory rating35.7 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length65 ft (19.8 m)
Longest span62 ft (19 m)
Deck width33 ft (10.1 m)
Roadway width33 ft (10.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic650 (2020)
Projected traffic657 by 2046
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 FAS 556 (ch 28) over Trib Sangamon River built?

It was built in 2000, making it 25 years old in 2025.

What condition is FAS 556 (ch 28) over Trib Sangamon River 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 December 2024.

How much traffic does FAS 556 (ch 28) over Trib Sangamon River carry?

About 650 vehicles per day (2020 count), of which roughly 9% are trucks.

How long is FAS 556 (ch 28) over Trib Sangamon River?

The structure is 65 ft (19.8 m) long with a longest span of 62 ft (19 m) and a deck 33 ft wide.

Who owns FAS 556 (ch 28) over Trib Sangamon River?

It is owned by the County Highway Agency.