US Bridges

TR 35 a over Flat Branch

Fair

Shelby County, Illinois · 3 MI SE of Moweaqua · Structure no. 087304200000000

Built
1916
109 years old
Condition
Fair
inspected April 2023
Type
Truss - Thru
Steel
Length
86 ft
1 main span
Daily traffic
50
2024 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

TR 35 a over Flat Branch is a steel truss - thru carrying TR 35 a over Flat Branch in Shelby County, Illinois. It was built in 1916, so it is 109 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 2% of them trucks, projected to reach 76 by 2046. The structure is 86 ft (26.2 m) long and 18 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesTR 35 a
CrossesFlat Branch
Location3 MI SE of Moweaqua
RouteCounty Highway 0
CountyShelby County
StateIllinois
Coordinates39.56629, -88.97202
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating46.7 US tons
Inventory rating31.7 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length86 ft (26.2 m)
Longest span85 ft (26 m)
Deck width18 ft (5.4 m)
Roadway width18 ft (5.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2024)
Projected traffic76 by 2046
Trucks2%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$597,000
NavigationNo navigation control on waterway

Frequently asked questions

When was TR 35 a over Flat Branch built?

It was built in 1916, making it 109 years old in 2025.

What condition is TR 35 a over Flat Branch 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 2023.

How much traffic does TR 35 a over Flat Branch carry?

About 50 vehicles per day (2024 count), of which roughly 2% are trucks.

How long is TR 35 a over Flat Branch?

The structure is 86 ft (26.2 m) long with a longest span of 85 ft (26 m) and a deck 18 ft wide.

Who owns TR 35 a over Flat Branch?

It is owned by the Town or Township Highway Agency.