US Bridges

TR 366 over Trib of Rock Creek

Fair

Hancock County, Illinois · 2.0 E Fountain Green · Structure no. 034422700000000

Built
1987
38 years old
Condition
Fair
inspected January 2025
Type
Channel Beam
Concrete
Length
82 ft
3 main spans
Daily traffic
50
2023 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

TR 366 over Trib of Rock Creek is a concrete channel beam carrying TR 366 over Trib of Rock Creek in Hancock County, Illinois. It was built in 1987, so it is 38 years old, younger 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 6 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, projected to reach 51 by 2046. The structure is 82 ft (24.9 m) long and 27 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesTR 366
CrossesTrib of Rock Creek
Location2.0 E Fountain Green
RouteCounty Highway 0
CountyHancock County
StateIllinois
Coordinates40.50689, -90.94491
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
Deck8 Very GoodNo problems noted.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating80.7 US tons
Inventory rating48.2 US tons

Structure

Structure typeChannel Beam
MaterialConcrete
DeckConcrete, precast panels
Main spans3
Design loadHS 20
Structure length82 ft (24.9 m)
Longest span37 ft (11.3 m)
Deck width27 ft (8.1 m)
Roadway width27 ft (8.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2023)
Projected traffic51 by 2046
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 366 over Trib of Rock Creek built?

It was built in 1987, making it 38 years old in 2025.

What condition is TR 366 over Trib of Rock Creek 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 January 2025.

How much traffic does TR 366 over Trib of Rock Creek carry?

About 50 vehicles per day (2023 count).

How long is TR 366 over Trib of Rock Creek?

The structure is 82 ft (24.9 m) long with a longest span of 37 ft (11.3 m) and a deck 27 ft wide.

Who owns TR 366 over Trib of Rock Creek?

It is owned by the Town or Township Highway Agency.