US Bridges

TR 347 over Sangamon River

Good

McLean County, Illinois · 2.0 MI W Arrowsmith · Structure no. 057321200000000

Built
1998
27 years old
Condition
Good
inspected March 2021
Type
Slab
Concrete Continuous
Length
80 ft
3 main spans
Daily traffic
50
2024 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

TR 347 over Sangamon River is a concrete continuous slab carrying TR 347 over Sangamon River in McLean County, Illinois. It was built in 1998, so it is 27 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 50 vehicles a day, roughly 4% of them trucks, projected to reach 51 by 2046. The structure is 80 ft (24.4 m) long and 26 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesTR 347
CrossesSangamon River
Location2.0 MI W Arrowsmith
RouteCounty Highway 0
Coordinates40.44224, -88.66727
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.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMarch 2021
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 alignment8: Equal to present desirable criteria
Operating rating48.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length80 ft (24.4 m)
Longest span30 ft (9.1 m)
Deck width26 ft (7.9 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2024)
Projected traffic51 by 2046
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
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 347 over Sangamon River built?

It was built in 1998, making it 27 years old in 2025.

What condition is TR 347 over Sangamon 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 March 2021.

How much traffic does TR 347 over Sangamon River carry?

About 50 vehicles per day (2024 count), of which roughly 4% are trucks.

How long is TR 347 over Sangamon River?

The structure is 80 ft (24.4 m) long with a longest span of 30 ft (9.1 m) and a deck 26 ft wide.

Who owns TR 347 over Sangamon River?

It is owned by the Town or Township Highway Agency.