US Bridges

TR 79 Drummer over Dickerson Slough

Poor

Ford County, Illinois · 570E 700N · Structure no. 027326500000000

Built
1980
45 years old
Condition
Poor
inspected May 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
38 ft
1 main span
Daily traffic
75
2023 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

TR 79 Drummer over Dickerson Slough is a prestressed concrete box beam or girders - multiple carrying TR 79 Drummer over Dickerson Slough in Ford County, Illinois. It was built in 1980, so it is 45 years old, younger 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 75 vehicles a day, projected to reach 76 by 2046. The structure is 38 ft (11.6 m) long and 27 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesTR 79 Drummer
CrossesDickerson Slough
Location570E 700N
RouteCounty Highway 0
Coordinates40.5006, -88.35365
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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.9 US tons
Inventory rating35.7 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20 + Mod
Structure length38 ft (11.6 m)
Longest span37 ft (11.3 m)
Deck width27 ft (8.3 m)
Roadway width27 ft (8.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic75 (2023)
Projected traffic76 by 2046
Trucks0%
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 79 Drummer over Dickerson Slough built?

It was built in 1980, making it 45 years old in 2025.

What condition is TR 79 Drummer over Dickerson Slough 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 May 2024.

How much traffic does TR 79 Drummer over Dickerson Slough carry?

About 75 vehicles per day (2023 count).

How long is TR 79 Drummer over Dickerson Slough?

The structure is 38 ft (11.6 m) long with a longest span of 37 ft (11.3 m) and a deck 27 ft wide.

Who owns TR 79 Drummer over Dickerson Slough?

It is owned by the Town or Township Highway Agency.