US Bridges

Ch 27 (fas 551) over Trib to Sangamon

Fair

Macon County, Illinois · 2.2 MI SW Harristown · Structure no. 058336200000000

Built
2003
22 years old
Condition
Fair
inspected February 2025
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
68 ft
1 main span
Daily traffic
300
2020 count
Owner
County
County Highway Agency

About this bridge

Ch 27 (fas 551) over Trib to Sangamon is a prestressed concrete box beam or girders - multiple carrying Ch 27 (fas 551) over Trib to Sangamon in Macon County, Illinois. It was built in 2003, so it is 22 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 300 vehicles a day, roughly 20% of them trucks, projected to reach 303 by 2046. The structure is 68 ft (20.7 m) long and 28 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesCh 27 (fas 551)
CrossesTrib to Sangamon
Location2.2 MI SW Harristown
RouteCounty Highway 0
CountyMacon County
StateIllinois
Coordinates39.82482, -89.1039
Functional classRural Minor 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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
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 geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable 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 length68 ft (20.7 m)
Longest span63 ft (19.3 m)
Deck width28 ft (8.5 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic300 (2020)
Projected traffic303 by 2046
Trucks20%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 Ch 27 (fas 551) over Trib to Sangamon built?

It was built in 2003, making it 22 years old in 2025.

What condition is Ch 27 (fas 551) over Trib to Sangamon 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 Ch 27 (fas 551) over Trib to Sangamon carry?

About 300 vehicles per day (2020 count), of which roughly 20% are trucks.

How long is Ch 27 (fas 551) over Trib to Sangamon?

The structure is 68 ft (20.7 m) long with a longest span of 63 ft (19.3 m) and a deck 28 ft wide.

Who owns Ch 27 (fas 551) over Trib to Sangamon?

It is owned by the County Highway Agency.