US Bridges

TR - 77 over Little Indian Creek

Fair

LaSalle County, Illinois · E 2175 N 4340 · Structure no. 050342100000000

Built
1968
57 years old
Condition
Fair
inspected June 2024
Type
Channel Beam
Concrete
Length
78 ft
2 main spans
Daily traffic
75
2020 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

TR - 77 over Little Indian Creek is a concrete channel beam carrying TR - 77 over Little Indian Creek in LaSalle County, Illinois. It was built in 1968, so it is 57 years old, older 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 5 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 75 vehicles a day, roughly 3% of them trucks, projected to reach 76 by 2046. The structure is 78 ft (23.8 m) long and 27 ft wide.

CarriesTR - 77
CrossesLittle Indian Creek
LocationE 2175 N 4340
RouteCounty Highway 0
Coordinates41.56511, -88.75391
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
Deck7 GoodSome minor problems.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating53.6 US tons
Inventory rating32.2 US tons

Structure

Structure typeChannel Beam
MaterialConcrete
DeckConcrete, precast panels
Main spans2
Design loadHS 15
Structure length78 ft (23.8 m)
Longest span38 ft (11.6 m)
Deck width27 ft (8.1 m)
Roadway width25 ft (7.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic75 (2020)
Projected traffic76 by 2046
Trucks3%
Lanes on structure2
Traffic directionTwo-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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was TR - 77 over Little Indian Creek built?

It was built in 1968, making it 57 years old in 2025.

What condition is TR - 77 over Little Indian 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 June 2024.

How much traffic does TR - 77 over Little Indian Creek carry?

About 75 vehicles per day (2020 count), of which roughly 3% are trucks.

How long is TR - 77 over Little Indian Creek?

The structure is 78 ft (23.8 m) long with a longest span of 38 ft (11.6 m) and a deck 27 ft wide.

Who owns TR - 77 over Little Indian Creek?

It is owned by the Town or Township Highway Agency.