US Bridges

Ill 10(FAP 721) over Sangamon River

Fair

Piatt County, Illinois · 1.5 MI W of I-72 · Structure no. 074007600000000

Built
1977
48 years old
Condition
Fair
inspected December 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
590 ft
1 main span
Daily traffic
3,100
2023 count
Owner
State
State Highway Agency

About this bridge

Ill 10(FAP 721) over Sangamon River is a steel stringer/multi-beam or girder carrying Ill 10(FAP 721) over Sangamon River in Piatt County, Illinois. It was built in 1977, so it is 48 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 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 3,100 vehicles a day, roughly 13% of them trucks, projected to reach 3,030 by 2046. The structure is 590 ft (179.8 m) long and 34 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

Location

Open in Google Maps
CarriesIll 10(FAP 721)
CrossesSangamon River
Location1.5 MI W of I-72
RouteState Highway 10
CountyPiatt County
StateIllinois
Coordinates40.10526, -88.51978
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionDecember 2023
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 alignment8: Equal to present desirable criteria
Operating rating40.7 US tons
Inventory rating31.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1 (+7 approach)
Design loadHS 20
Structure length590 ft (179.8 m)
Longest span129 ft (39.2 m)
Deck width34 ft (10.4 m)
Roadway width31 ft (9.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,100 (2023)
Projected traffic3,030 by 2046
Trucks13%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.7 mi (14 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$1.7 million
NavigationNo navigation control on waterway

Frequently asked questions

When was Ill 10(FAP 721) over Sangamon River built?

It was built in 1977, making it 48 years old in 2025.

What condition is Ill 10(FAP 721) over 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 2023.

How much traffic does Ill 10(FAP 721) over Sangamon River carry?

About 3,100 vehicles per day (2023 count), of which roughly 13% are trucks.

How long is Ill 10(FAP 721) over Sangamon River?

The structure is 590 ft (179.8 m) long with a longest span of 129 ft (39.2 m) and a deck 34 ft wide.

Who owns Ill 10(FAP 721) over Sangamon River?

It is owned by the State Highway Agency.