US Bridges

TR 490 over Sagamon River

Good

McLean County, Illinois · 2.5 MI W Arrowsmith · Structure no. 057321000000000

Built
1995
30 years old
Condition
Good
inspected April 2022
Type
Tee Beam
Concrete
Length
54 ft
1 main span
Daily traffic
25
2024 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

TR 490 over Sagamon River is a concrete tee beam carrying TR 490 over Sagamon River in McLean County, Illinois. It was built in 1995, so it is 30 years old, younger than the Illinois average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 25 vehicles a day, roughly 8% of them trucks, projected to reach 25 by 2046. The structure is 54 ft (16.5 m) long and 26 ft wide.

CarriesTR 490
CrossesSagamon River
Location2.5 MI W Arrowsmith
RouteCounty Highway 0
Coordinates40.4498, -88.68409
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionApril 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than 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

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length54 ft (16.5 m)
Longest span52 ft (15.7 m)
Deck width26 ft (7.9 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic25 (2024)
Projected traffic25 by 2046
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerTown or Township Highway Agency
Maintained byTown or Township 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 TR 490 over Sagamon River built?

It was built in 1995, making it 30 years old in 2025.

What condition is TR 490 over Sagamon River in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in April 2022.

How much traffic does TR 490 over Sagamon River carry?

About 25 vehicles per day (2024 count), of which roughly 8% are trucks.

How long is TR 490 over Sagamon River?

The structure is 54 ft (16.5 m) long with a longest span of 52 ft (15.7 m) and a deck 26 ft wide.

Who owns TR 490 over Sagamon River?

It is owned by the Town or Township Highway Agency.