US Bridges

TR 371 over Coffeen Lake

Good

Montgomery County, Illinois · 0.9 MI W Coffeen · Structure no. 068337100000000

Built
2019
6 years old
Condition
Good
inspected January 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
120 ft
3 main spans
Daily traffic
200
2020 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

TR 371 over Coffeen Lake is a prestressed concrete box beam or girders - multiple carrying TR 371 over Coffeen Lake in Montgomery County, Illinois. It was built in 2019, so it is 6 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 200 vehicles a day, roughly 5% of them trucks, projected to reach 202 by 2046. The structure is 120 ft (36.5 m) long and 30 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesTR 371
CrossesCoffeen Lake
Location0.9 MI W Coffeen
RouteCounty Highway 0
CountyMontgomery County
StateIllinois
Coordinates39.08588, -89.41556
Functional classRural Minor Collector

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.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJanuary 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating57.1 US tons
Inventory rating44 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans3
Design loadHS 25 or greater
Structure length120 ft (36.5 m)
Longest span39 ft (12 m)
Deck width30 ft (9.1 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic200 (2020)
Projected traffic202 by 2046
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 371 over Coffeen Lake built?

It was built in 2019, making it 6 years old in 2025.

What condition is TR 371 over Coffeen Lake 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 January 2024.

How much traffic does TR 371 over Coffeen Lake carry?

About 200 vehicles per day (2020 count), of which roughly 5% are trucks.

How long is TR 371 over Coffeen Lake?

The structure is 120 ft (36.5 m) long with a longest span of 39 ft (12 m) and a deck 30 ft wide.

Who owns TR 371 over Coffeen Lake?

It is owned by the Town or Township Highway Agency.