US Bridges

TR 76 (TH-S28) over Snag Creek

Poor

Marshall County, Illinois · T29N-R2W-3PM Sec 33 · Structure no. 062481400000000

Built
1935
90 years old, rebuilt 1969
Condition
Poor
inspected March 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
41 ft
1 main span
Daily traffic
50
2024 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

TR 76 (TH-S28) over Snag Creek is a prestressed concrete box beam or girders - multiple carrying TR 76 (TH-S28) over Snag Creek in Marshall County, Illinois. It was built in 1935 and reconstructed in 1969, so it is 90 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.

It carries about 50 vehicles a day, roughly 28% of them trucks, projected to reach 126 by 2046. The structure is 41 ft (12.5 m) long and 18 ft wide.

CarriesTR 76 (TH-S28)
CrossesSnag Creek
LocationT29N-R2W-3PM Sec 33
RouteCounty Highway 0
Coordinates40.92642, -89.34735
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
Deck3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Superstructure3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating49.3 US tons
Inventory rating29.7 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 15
Structure length41 ft (12.5 m)
Longest span40 ft (12.2 m)
Deck width18 ft (5.5 m)
Roadway width16 ft (4.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2024)
Projected traffic126 by 2046
Trucks28%
Lanes on structure1
Traffic directionOne-lane bridge for two-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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$117,000
NavigationNo navigation control on waterway

Frequently asked questions

When was TR 76 (TH-S28) over Snag Creek built?

It was built in 1935, making it 90 years old in 2025. It was reconstructed in 1969.

What condition is TR 76 (TH-S28) over Snag Creek 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 March 2023.

How much traffic does TR 76 (TH-S28) over Snag Creek carry?

About 50 vehicles per day (2024 count), of which roughly 28% are trucks.

How long is TR 76 (TH-S28) over Snag Creek?

The structure is 41 ft (12.5 m) long with a longest span of 40 ft (12.2 m) and a deck 18 ft wide.

Who owns TR 76 (TH-S28) over Snag Creek?

It is owned by the Town or Township Highway Agency.