US Bridges

FAS 487 Ch 36 over Sangamon River

Fair

McLean County, Illinois · W Side Saybrook · Structure no. 057362000000000

Built
1989
36 years old
Condition
Fair
inspected November 2024
Type
Slab
Concrete Continuous
Length
118 ft
3 main spans
Daily traffic
450
2024 count
Owner
County
County Highway Agency

About this bridge

FAS 487 Ch 36 over Sangamon River is a concrete continuous slab carrying FAS 487 Ch 36 over Sangamon River in McLean County, Illinois. It was built in 1989, so it is 36 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 450 vehicles a day, roughly 11% of them trucks, projected to reach 505 by 2046. The structure is 118 ft (36 m) long and 35 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesFAS 487 Ch 36
CrossesSangamon River
LocationW Side Saybrook
RouteCounty Highway 0
Coordinates40.42734, -88.5311
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 protection7 GoodSome minor problems.
Last inspectionNovember 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 alignment8: Equal to present desirable criteria
Operating rating48.9 US tons
Inventory rating35.7 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length118 ft (36 m)
Longest span46 ft (14 m)
Deck width35 ft (10.7 m)
Roadway width33 ft (10.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic450 (2024)
Projected traffic505 by 2046
Trucks11%
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 FAS 487 Ch 36 over Sangamon River built?

It was built in 1989, making it 36 years old in 2025.

What condition is FAS 487 Ch 36 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 November 2024.

How much traffic does FAS 487 Ch 36 over Sangamon River carry?

About 450 vehicles per day (2024 count), of which roughly 11% are trucks.

How long is FAS 487 Ch 36 over Sangamon River?

The structure is 118 ft (36 m) long with a longest span of 46 ft (14 m) and a deck 35 ft wide.

Who owns FAS 487 Ch 36 over Sangamon River?

It is owned by the County Highway Agency.