US Bridges

TR 343 over S. Fork Sangamon R.

PoorPosted for load

Christian County, Illinois · 8 W of Rosamond · Structure no. 011326400000000

Built
1900
125 years old
Condition
Poor
inspected November 2023
Type
Truss - Thru
Steel
Length
51 ft
1 main span
Daily traffic
25
2021 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

TR 343 over S. Fork Sangamon R. is a steel truss - thru carrying TR 343 over S. Fork Sangamon R. in Christian County, Illinois. It was built in 1900, so it is 125 years old, older than the Illinois average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 3 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.

It carries about 25 vehicles a day, projected to reach 25 by 2046. The structure is 51 ft (15.5 m) long and 14 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesTR 343
CrossesS. Fork Sangamon R.
Location8 W of Rosamond
RouteCounty Highway 0
CountyChristian County
StateIllinois
Coordinates39.37094, -89.31387
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating7.2 US tons
Inventory rating4.3 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckWood or timber
Main spans1
Design loadUnknown
Structure length51 ft (15.5 m)
Longest span50 ft (15.2 m)
Deck width14 ft (4.2 m)
Roadway width14 ft (4.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic25 (2021)
Projected traffic25 by 2046
Trucks0%
Lanes on structure1
Traffic directionOne-lane bridge for two-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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$89,000
NavigationNo navigation control on waterway

Frequently asked questions

When was TR 343 over S. Fork Sangamon R. built?

It was built in 1900, making it 125 years old in 2025.

What condition is TR 343 over S. Fork Sangamon R. in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in November 2023.

How much traffic does TR 343 over S. Fork Sangamon R. carry?

About 25 vehicles per day (2021 count).

How long is TR 343 over S. Fork Sangamon R.?

The structure is 51 ft (15.5 m) long with a longest span of 50 ft (15.2 m) and a deck 14 ft wide.

Who owns TR 343 over S. Fork Sangamon R.?

It is owned by the Town or Township Highway Agency.