US Bridges

TR 77 over Claypool Ditch

Poor

Grundy County, Illinois · 0.50 Mi.E. Gorman RD · Structure no. 032450600000000

Built
2001
24 years old
Condition
Poor
inspected October 2024
Type
Slab
Concrete
Length
68 ft
3 main spans
Daily traffic
250
2024 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

TR 77 over Claypool Ditch is a concrete slab carrying TR 77 over Claypool Ditch in Grundy County, Illinois. It was built in 2001, so it is 24 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 250 vehicles a day, roughly 18% of them trucks, projected to reach 300 by 2046. The structure is 68 ft (20.7 m) long and 26 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesTR 77
CrossesClaypool Ditch
Location0.50 Mi.E. Gorman RD
RouteCounty Highway 0
CountyGrundy County
StateIllinois
Coordinates41.30863, -88.33337
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating53.2 US tons
Inventory rating31.7 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, precast panels
Main spans3
Design loadHS 20
Structure length68 ft (20.7 m)
Longest span22 ft (6.7 m)
Deck width26 ft (8 m)
Roadway width26 ft (8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic250 (2024)
Projected traffic300 by 2046
Trucks18%
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 77 over Claypool Ditch built?

It was built in 2001, making it 24 years old in 2025.

What condition is TR 77 over Claypool Ditch 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 October 2024.

How much traffic does TR 77 over Claypool Ditch carry?

About 250 vehicles per day (2024 count), of which roughly 18% are trucks.

How long is TR 77 over Claypool Ditch?

The structure is 68 ft (20.7 m) long with a longest span of 22 ft (6.7 m) and a deck 26 ft wide.

Who owns TR 77 over Claypool Ditch?

It is owned by the Town or Township Highway Agency.