US Bridges

TR 20 over Senachwine Lake Trib

Fair

Putnam County, Illinois · 425N 395E · Structure no. 078300800000000

Built
1955
70 years old, rebuilt 1980
Condition
Fair
inspected April 2024
Type
Channel Beam
Concrete
Length
24 ft
1 main span
Daily traffic
50
2023 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

TR 20 over Senachwine Lake Trib is a concrete channel beam carrying TR 20 over Senachwine Lake Trib in Putnam County, Illinois. It was built in 1955 and reconstructed in 1980, so it is 70 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 5 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 50 vehicles a day, roughly 20% of them trucks, projected to reach 52 by 2046. The structure is 24 ft (7.3 m) long and 23 ft wide.

Location

Open in Google Maps
CarriesTR 20
CrossesSenachwine Lake Trib
Location425N 395E
RouteCounty Highway 0
CountyPutnam County
StateIllinois
Coordinates41.16593, -89.39037
Functional classRural Local

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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating72.9 US tons
Inventory rating43.5 US tons

Structure

Structure typeChannel Beam
MaterialConcrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length24 ft (7.3 m)
Longest span23 ft (7.1 m)
Deck width23 ft (6.9 m)
Roadway width23 ft (6.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2023)
Projected traffic52 by 2046
Trucks20%
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 20 over Senachwine Lake Trib built?

It was built in 1955, making it 70 years old in 2025. It was reconstructed in 1980.

What condition is TR 20 over Senachwine Lake Trib 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 April 2024.

How much traffic does TR 20 over Senachwine Lake Trib carry?

About 50 vehicles per day (2023 count), of which roughly 20% are trucks.

How long is TR 20 over Senachwine Lake Trib?

The structure is 24 ft (7.3 m) long with a longest span of 23 ft (7.1 m) and a deck 23 ft wide.

Who owns TR 20 over Senachwine Lake Trib?

It is owned by the Town or Township Highway Agency.