US Bridges

US 51(FAP 710 Alt) over NS RR & Cerro Gordo St.

Fair

Macon County, Illinois · In Decatur · Structure no. 058001400000000

Built
1966
59 years old, rebuilt 2011
Condition
Fair
inspected November 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
581 ft
10 main spans
Daily traffic
9,600
2023 count
Owner
State
State Highway Agency

About this bridge

US 51(FAP 710 Alt) over NS RR & Cerro Gordo St. is a steel continuous stringer/multi-beam or girder carrying US 51(FAP 710 Alt) over NS RR & Cerro Gordo St. in Macon County, Illinois. It was built in 1966 and reconstructed in 2011, so it is 59 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 9,600 vehicles a day, roughly 2% of them trucks, projected to reach 10,605 by 2046. The structure is 581 ft (177.1 m) long and 48 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesUS 51(FAP 710 Alt)
CrossesNS RR & Cerro Gordo St.
LocationIn Decatur
CountyMacon County
StateIllinois
Coordinates39.84694, -88.95335
Functional classUrban Other Principal 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating98.9 US tons
Inventory rating53.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans10
Design loadHS 20
Structure length581 ft (177.1 m)
Longest span81 ft (24.7 m)
Deck width48 ft (14.6 m)
Roadway width45 ft (13.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,600 (2023)
Projected traffic10,605 by 2046
Trucks2%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway and railroad
Detour if closed1.9 mi (3 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$3.9 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was US 51(FAP 710 Alt) over NS RR & Cerro Gordo St. built?

It was built in 1966, making it 59 years old in 2025. It was reconstructed in 2011.

What condition is US 51(FAP 710 Alt) over NS RR & Cerro Gordo St. 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 November 2023.

How much traffic does US 51(FAP 710 Alt) over NS RR & Cerro Gordo St. carry?

About 9,600 vehicles per day (2023 count), of which roughly 2% are trucks.

How long is US 51(FAP 710 Alt) over NS RR & Cerro Gordo St.?

The structure is 581 ft (177.1 m) long with a longest span of 81 ft (24.7 m) and a deck 48 ft wide.

Who owns US 51(FAP 710 Alt) over NS RR & Cerro Gordo St.?

It is owned by the State Highway Agency.